From c93b142692a8fc6a2015efb2267c17c46281be55 Mon Sep 17 00:00:00 2001
From: Cecile Tonglet <cecile@parity.io>
Date: Mon, 10 Feb 2020 10:32:10 +0100
Subject: [PATCH] Test node exits properly (#831)

* Initial commit

Forked at: 703ac8bbbc10b19f6d559f344119909ad7367e36
Parent branch: origin/master

* Test running node and interrupts

* WIP

Forked at: 1942ae27ae23809a40f955545dfbf0467faa7750
Parent branch: origin/cumulus-branch

* Update Cargo.lock

* WIP

Forked at: 1942ae27ae23809a40f955545dfbf0467faa7750
Parent branch: origin/cumulus-branch

* WIP

Forked at: 1942ae27ae23809a40f955545dfbf0467faa7750
Parent branch: origin/cumulus-branch

* WIP

Forked at: 1942ae27ae23809a40f955545dfbf0467faa7750
Parent branch: origin/cumulus-branch
---
 polkadot/Cargo.lock                           | 210 ++++++++++++------
 polkadot/Cargo.toml                           |   4 +
 polkadot/cli/src/command.rs                   |   2 +-
 polkadot/tests/common.rs                      |  34 +++
 polkadot/tests/purge_chain_works.rs           |  53 +++++
 .../tests/running_the_node_and_interrupt.rs   |  48 ++++
 6 files changed, 281 insertions(+), 70 deletions(-)
 create mode 100644 polkadot/tests/common.rs
 create mode 100644 polkadot/tests/purge_chain_works.rs
 create mode 100644 polkadot/tests/running_the_node_and_interrupt.rs

diff --git a/polkadot/Cargo.lock b/polkadot/Cargo.lock
index 9fdd1dbb60..ac074317ef 100644
--- a/polkadot/Cargo.lock
+++ b/polkadot/Cargo.lock
@@ -59,7 +59,7 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -161,6 +161,18 @@ dependencies = [
  "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "assert_cmd"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "doc-comment 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "escargot 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "predicates 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "predicates-core 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "predicates-tree 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "assert_matches"
 version = "1.3.0"
@@ -261,7 +273,7 @@ name = "base64"
 version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -274,7 +286,7 @@ name = "bincode"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -352,7 +364,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "block-padding 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -423,7 +435,7 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.1.2"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -443,7 +455,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "byteorder"
-version = "1.3.2"
+version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -451,7 +463,7 @@ name = "bytes"
 version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -600,7 +612,7 @@ name = "cranelift-codegen"
 version = "0.50.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cranelift-bforest 0.50.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cranelift-codegen-meta 0.50.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cranelift-codegen-shared 0.50.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -771,7 +783,7 @@ name = "curve25519-dalek"
 version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "clear_on_drop 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -783,7 +795,7 @@ name = "curve25519-dalek"
 version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "subtle 2.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -875,7 +887,7 @@ name = "dns-parser"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -982,6 +994,17 @@ dependencies = [
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "escargot"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "exit-future"
 version = "0.2.0"
@@ -1070,7 +1093,7 @@ name = "fixed-hash"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hex 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1303,7 +1326,7 @@ dependencies = [
  "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1404,7 +1427,7 @@ name = "fxhash"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1457,7 +1480,7 @@ version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fallible-iterator 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1505,7 +1528,7 @@ dependencies = [
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1514,7 +1537,7 @@ name = "h2"
 version = "0.1.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1569,7 +1592,7 @@ name = "hashbrown"
 version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1605,7 +1628,7 @@ dependencies = [
 
 [[package]]
 name = "hex"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1886,10 +1909,10 @@ dependencies = [
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-core 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-pubsub 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-pubsub 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1902,7 +1925,7 @@ dependencies = [
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1926,7 +1949,7 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-http-server"
-version = "14.0.5"
+version = "14.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "hyper 0.12.35 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1934,18 +1957,18 @@ dependencies = [
  "jsonrpc-server-utils 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "jsonrpc-pubsub"
-version = "14.0.5"
+version = "14.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "jsonrpc-core 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1966,13 +1989,13 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-ws-server"
-version = "14.0.5"
+version = "14.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "jsonrpc-core 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-server-utils 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2037,7 +2060,7 @@ dependencies = [
  "rustc-hex 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-authority-discovery 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-block-builder 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -2305,7 +2328,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bs58 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2721,7 +2744,7 @@ name = "merlin"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "keccak 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "zeroize 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2839,6 +2862,18 @@ dependencies = [
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "nix"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "nodrop"
 version = "0.1.14"
@@ -3413,7 +3448,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayref 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "bs58 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "data-encoding 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-multihash 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3599,7 +3634,7 @@ name = "pbkdf2"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "crypto-mac 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3674,7 +3709,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "polkadot"
 version = "0.7.20"
 dependencies = [
+ "assert_cmd 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-cli 0.7.20",
  "polkadot-service 0.7.20",
  "vergen 3.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3896,7 +3933,7 @@ dependencies = [
  "rustc-hex 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-authority-discovery 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-block-builder 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -3943,7 +3980,7 @@ dependencies = [
  "rustc-hex 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-core 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-inherents 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -4060,6 +4097,29 @@ name = "ppv-lite86"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "predicates"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "predicates-core 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "predicates-core"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "predicates-tree"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "predicates-core 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "treeline 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "pretty_assertions"
 version = "0.5.1"
@@ -4603,7 +4663,7 @@ dependencies = [
  "sc-client-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-keystore 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-network 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-authority-discovery 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-blockchain 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -4637,7 +4697,7 @@ dependencies = [
  "sc-network 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-telemetry 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-core 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-runtime 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
 ]
@@ -4678,7 +4738,7 @@ dependencies = [
  "sc-service 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-telemetry 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-tracing 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-blockchain 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-core 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-keyring 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -4972,7 +5032,7 @@ dependencies = [
  "sc-network 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-network-gossip 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-telemetry 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-arithmetic 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-blockchain 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-consensus 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -4989,10 +5049,10 @@ version = "2.0.0"
 source = "git+https://github.com/paritytech/substrate?branch=polkadot-master#aa15e17a71e28eea1291f2e5d169574d4894bc38"
 dependencies = [
  "derive_more 0.99.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "hex 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-application-crypto 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-core 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "subtle 2.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5027,7 +5087,7 @@ dependencies = [
  "sc-client-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-peerset 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 2.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog_derive 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5093,7 +5153,7 @@ dependencies = [
  "futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "libp2p 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -5104,7 +5164,7 @@ dependencies = [
  "futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "hash-db 0.15.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-core 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-pubsub 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-pubsub 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-scale-codec 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5113,7 +5173,7 @@ dependencies = [
  "sc-executor 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-keystore 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-rpc-api 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-blockchain 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-core 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -5136,12 +5196,12 @@ dependencies = [
  "jsonrpc-core 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-core-client 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-derive 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-pubsub 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-pubsub 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-scale-codec 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-core 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-rpc 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-transaction-pool 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -5154,12 +5214,12 @@ version = "2.0.0"
 source = "git+https://github.com/paritytech/substrate?branch=polkadot-master#aa15e17a71e28eea1291f2e5d169574d4894bc38"
 dependencies = [
  "jsonrpc-core 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-http-server 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-pubsub 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-ws-server 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-http-server 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-pubsub 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-ws-server 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-runtime 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
 ]
 
@@ -5195,7 +5255,7 @@ dependencies = [
  "sc-tracing 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sc-transaction-pool 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 2.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "sp-api 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "sp-application-crypto 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
@@ -5255,7 +5315,7 @@ dependencies = [
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "sc-telemetry 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 2.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "tracing-core 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -5393,7 +5453,7 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.46"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "itoa 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5512,7 +5572,7 @@ dependencies = [
  "chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "erased-serde 0.3.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 2.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -5745,11 +5805,11 @@ source = "git+https://github.com/paritytech/substrate?branch=polkadot-master#aa1
 dependencies = [
  "base58 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "ed25519-dalek 1.0.0-pre.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hash-db 0.15.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "hash256-std-hasher 0.15.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "hex 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "impl-serde 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libsecp256k1 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5951,7 +6011,7 @@ version = "2.0.0"
 source = "git+https://github.com/paritytech/substrate?branch=polkadot-master#aa15e17a71e28eea1291f2e5d169574d4894bc38"
 dependencies = [
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -6650,6 +6710,11 @@ dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "treeline"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "trie-db"
 version = "0.19.2"
@@ -6702,7 +6767,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -6724,7 +6789,7 @@ name = "uint"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "crunchy 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hex 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "static_assertions 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -6882,7 +6947,7 @@ name = "wasm-bindgen-backend"
 version = "0.2.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bumpalo 3.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bumpalo 3.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -7176,7 +7241,7 @@ name = "ws"
 version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "httparse 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -7295,6 +7360,7 @@ dependencies = [
 "checksum arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
 "checksum asn1_der 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6fce6b6a0ffdafebd82c87e79e3f40e8d2c523e5fea5566ff6b90509bf98d638"
 "checksum asn1_der_derive 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0d0864d84b8e07b145449be9a8537db86bf9de5ce03b913214694643b4743502"
+"checksum assert_cmd 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6283bac8dd7226470d491bc4737816fea4ca1fba7a2847f2e9097fd6bfb4624c"
 "checksum assert_matches 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7deb0a829ca7bcfaf5da70b073a8d128619259a7be8216a355e23f00763059e5"
 "checksum async-std 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "538ecb01eb64eecd772087e5b6f7540cbc917f047727339a472dafed2185b267"
 "checksum async-task 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0ac2c016b079e771204030951c366db398864f5026f84a44dafb0ff20f02085d"
@@ -7322,11 +7388,11 @@ dependencies = [
 "checksum browser-utils 0.8.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)" = "<none>"
 "checksum bs58 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b170cd256a3f9fa6b9edae3e44a7dfdfc77e8124dbc3e2612d75f9c3e2396dae"
 "checksum bstr 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "502ae1441a0a5adb8fbd38a5955a6416b9493e92b465de5e4a9bde6a539c2c48"
-"checksum bumpalo 3.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "5fb8038c1ddc0a5f73787b130f4cc75151e96ed33e417fde765eb5a81e3532f4"
+"checksum bumpalo 3.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1f359dc14ff8911330a51ef78022d376f25ed00248912803b58f00cb1c27f742"
 "checksum byte-slice-cast 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "b0a5e3906bcbf133e33c1d4d95afc664ad37fbdb9f6568d8043e7ea8c27d93d3"
 "checksum byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 "checksum byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0fc10e8cc6b2580fda3f36eb6dc5316657f812a3df879a44a66fc9f0fdbc4855"
-"checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
+"checksum byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
 "checksum bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)" = "206fdffcfa2df7cbe15601ef46c813fce0965eb3286db6b56c583b814b51c81c"
 "checksum bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)" = "130aac562c0dd69c56b3b1cc8ffd2e17be31d0b6c25b61c96b76231aa23e39e1"
 "checksum c2-chacha 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "214238caa1bf3a496ec3392968969cab8549f96ff30652c9e56885329315f6bb"
@@ -7387,6 +7453,7 @@ dependencies = [
 "checksum erased-serde 0.3.10 (registry+https://github.com/rust-lang/crates.io-index)" = "cd7d80305c9bd8cd78e3c753eb9fb110f83621e5211f1a3afffcc812b104daf9"
 "checksum errno 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "c2a071601ed01b988f896ab14b95e67335d1eeb50190932a1320f7fe3cadc84e"
 "checksum errno-dragonfly 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "14ca354e36190500e1e1fb267c647932382b54053c50b14970856c0b00a35067"
+"checksum escargot 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "74cf96bec282dcdb07099f7e31d9fed323bca9435a09aba7b6d99b7617bca96d"
 "checksum exit-future 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e43f2f1833d64e33f15592464d6fdd70f349dda7b1a53088eb83cd94014008c5"
 "checksum faerie 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f902f2af041f6c7177a2a04f805687cdc71e69c7cbef059a2755d8923f4cd7a8"
 "checksum failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "f8273f13c977665c5db7eb2b99ae520952fe5ac831ae4cd09d80c4c7042b5ed9"
@@ -7450,7 +7517,7 @@ dependencies = [
 "checksum hashbrown 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8e6073d0ca812575946eb5f35ff68dbe519907b25c42530389ff946dc84c6ead"
 "checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
 "checksum hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "eff2656d88f158ce120947499e971d743c05dbcbed62e5bd2f38f1698bbc3772"
-"checksum hex 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "023b39be39e3a2da62a94feb433e91e8bcd37676fbc8bea371daf52b7a769a3e"
+"checksum hex 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "76cdda6bf525062a0c9e8f14ee2b37935c86b8efb6c8b69b3c83dfb518a914af"
 "checksum hex-literal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "961de220ec9a91af2e1e5bd80d02109155695e516771762381ef8581317066e0"
 "checksum hex-literal-impl 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9d4c5c844e2fee0bf673d54c2c177f1713b3d2af2ff6e666b49cb7572e6cf42d"
 "checksum hmac 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5dcb5e64cda4c23119ab41ba960d1e170a774c8e4b9d9e6a9bc18aabf5e59695"
@@ -7483,10 +7550,10 @@ dependencies = [
 "checksum jsonrpc-core 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fe3b688648f1ef5d5072229e2d672ecb92cbff7d1c79bcf3fd5898f3f3df0970"
 "checksum jsonrpc-core-client 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "080dc110be17701097df238fad3c816d4a478a1899dfbcf8ec8957dd40ec7304"
 "checksum jsonrpc-derive 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "8609af8f63b626e8e211f52441fcdb6ec54f1a446606b10d5c89ae9bf8a20058"
-"checksum jsonrpc-http-server 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "2d83d348120edee487c560b7cdd2565055d61cda053aa0d0ef0f8b6a18429048"
-"checksum jsonrpc-pubsub 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "3453625f0f0f5cd6d6776d389d73b7d70fcc98620b7cbb1cbbb1f6a36e95f39a"
+"checksum jsonrpc-http-server 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "816d63997ea45d3634608edbef83ddb35e661f7c0b27b5b72f237e321f0e9807"
+"checksum jsonrpc-pubsub 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "5b31c9b90731276fdd24d896f31bb10aecf2e5151733364ae81123186643d939"
 "checksum jsonrpc-server-utils 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "95b7635e618a0edbbe0d2a2bbbc69874277c49383fcf6c3c0414491cfb517d22"
-"checksum jsonrpc-ws-server 14.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "b34faa167c3ac9705aeecb986c0da6056529f348425dbe0441db60a2c4cc41d1"
+"checksum jsonrpc-ws-server 14.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "b94e5773b2ae66e0e02c80775ce6bbba6f15d5bb47c14ec36a36fcf94f8df851"
 "checksum keccak 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "67c21572b4949434e4fc1e1978b99c5f77064153c59d998bf13ecd96fb5ecba7"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum kv-log-macro 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c54d9f465d530a752e6ebdc217e081a7a614b48cb200f6f0aee21ba6bc9aabb"
@@ -7553,6 +7620,7 @@ dependencies = [
 "checksum names 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ef320dab323286b50fb5cdda23f61c796a72a89998ab565ca32525c5c556f2da"
 "checksum net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)" = "42550d9fb7b6684a6d404d9fa7250c2eb2646df731d1c06afc06dcee9e1bcf88"
 "checksum nix 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b7fd5681d13fda646462cfbd4e5f2051279a89a544d50eb98c365b507246839f"
+"checksum nix 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "50e4785f2c3b7589a0d0c1dd60285e1188adac4006e8abd6dd578e1567027363"
 "checksum nodrop 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
 "checksum nohash-hasher 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "721a2bf1c26159ebf17e0a980bc4ce61f4b2fec5ec3b42d42fddd7a84a9e538f"
 "checksum nom 4.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2ad2a91a8e869eeb30b9cb3119ae87773a8f4ae617f41b1eb9c154b2905f7bd6"
@@ -7628,6 +7696,9 @@ dependencies = [
 "checksum pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)" = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
 "checksum plain 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
 "checksum ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
+"checksum predicates 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a9bfe52247e5cc9b2f943682a85a5549fb9662245caf094504e69a2f03fe64d4"
+"checksum predicates-core 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "06075c3a3e92559ff8929e7a280684489ea27fe44805174c3ebd9328dcb37178"
+"checksum predicates-tree 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8e63c4859013b38a76eca2414c64911fba30def9e3202ac461a2d22831220124"
 "checksum pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3a029430f0d744bc3d15dd474d591bed2402b645d024583082b9f63bb936dac6"
 "checksum primitive-types 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e4336f4f5d5524fa60bcbd6fe626f9223d8142a50e7053e979acdf0da41ab975"
 "checksum proc-macro-crate 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "e10d4b51f154c8a7fb96fd6dad097cb74b863943ec010ac94b9fd1be8861fe1e"
@@ -7728,7 +7799,7 @@ dependencies = [
 "checksum send_wrapper 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "686ef91cf020ad8d4aca9a7047641fd6add626b7b89e14546c2b6a76781cf822"
 "checksum serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)" = "414115f25f818d7dfccec8ee535d76949ae78584fc4f79a6f45a904bf8ab4449"
 "checksum serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)" = "128f9e303a5a29922045a830221b8f78ec74a5f544944f3d5984f8ec3895ef64"
-"checksum serde_json 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)" = "21b01d7f0288608a01dca632cf1df859df6fd6ffa885300fc275ce2ba6221953"
+"checksum serde_json 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)" = "15913895b61e0be854afd32fd4163fcd2a3df34142cf2cb961b310ce694cbf90"
 "checksum sha-1 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f7d94d0bede923b3cea61f3f1ff57ff8cdfd77b400fb8f9998949e0cf04163df"
 "checksum sha1 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2579985fda508104f7587689507983eadd6a6e84dd35d6d115361f530916fa0d"
 "checksum sha2 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "27044adfd2e1f077f649f59deb9490d3941d674002f7d062870a60ebe9bd47a0"
@@ -7843,6 +7914,7 @@ dependencies = [
 "checksum tracing 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "1e213bd24252abeb86a0b7060e02df677d367ce6cb772cef17e9214b8390a8d3"
 "checksum tracing-attributes 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "04cfd395def5a60236e187e1ff905cb55668a59f29928dec05e6e1b1fd2ac1f3"
 "checksum tracing-core 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "13a46f11e372b8bd4b4398ea54353412fdd7fd42a8370c7e543e218cf7661978"
+"checksum treeline 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a7f741b240f1a48843f9b8e0444fb55fb2a4ff67293b50a9179dfd5ea67f8d41"
 "checksum trie-db 0.19.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a0d747ae5b6f078df7e46477fcc7df66df9eb4f27a031cf4a7c890a8dd03d8e6"
 "checksum trie-db 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de9222c50cc325855621271157c973da27a0dcd26fa06f8edf81020bd2333df0"
 "checksum trie-root 0.15.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0b779f7c1c8fe9276365d9d5be5c4b5adeacf545117bb3f64c974305789c5c0b"
diff --git a/polkadot/Cargo.toml b/polkadot/Cargo.toml
index 15cfe5c218..141dce8d49 100644
--- a/polkadot/Cargo.toml
+++ b/polkadot/Cargo.toml
@@ -17,6 +17,10 @@ service = { package = "polkadot-service", path = "service" }
 [build-dependencies]
 vergen = "3.0.4"
 
+[dev-dependencies]
+assert_cmd = "0.12"
+nix = "0.17"
+
 [workspace]
 members = [
 	"availability-store",
diff --git a/polkadot/cli/src/command.rs b/polkadot/cli/src/command.rs
index d5469f5f26..529695635a 100644
--- a/polkadot/cli/src/command.rs
+++ b/polkadot/cli/src/command.rs
@@ -74,7 +74,7 @@ pub fn run(version: VersionInfo) -> error::Result<()> {
 		},
 		Some(Subcommand::Base(cmd)) => {
 			sc_cli::init(cmd.get_shared_params(), &version)?;
-			sc_cli::init_config(&mut config, &opt.run.shared_params, &version, load_spec)?;
+			sc_cli::init_config(&mut config, &cmd.get_shared_params(), &version, load_spec)?;
 
 			let is_kusama = config.chain_spec.as_ref().map_or(false, |s| s.is_kusama());
 
diff --git a/polkadot/tests/common.rs b/polkadot/tests/common.rs
new file mode 100644
index 0000000000..96060bf85d
--- /dev/null
+++ b/polkadot/tests/common.rs
@@ -0,0 +1,34 @@
+// Copyright 2020 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::{process::{Child, ExitStatus}, thread, time::Duration};
+
+/// Wait for the given `child` the given ammount of `secs`.
+///
+/// Returns the `Some(exit status)` or `None` if the process did not finish in the given time.
+pub fn wait_for(child: &mut Child, secs: usize) -> Option<ExitStatus> {
+	for _ in 0..secs {
+		match child.try_wait().unwrap() {
+			Some(status) => return Some(status),
+			None => thread::sleep(Duration::from_secs(1)),
+		}
+	}
+	eprintln!("Took to long to exit. Killing...");
+	let _ = child.kill();
+	child.wait().unwrap();
+
+	None
+}
diff --git a/polkadot/tests/purge_chain_works.rs b/polkadot/tests/purge_chain_works.rs
new file mode 100644
index 0000000000..157cd10f8e
--- /dev/null
+++ b/polkadot/tests/purge_chain_works.rs
@@ -0,0 +1,53 @@
+// Copyright 2020 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+use assert_cmd::cargo::cargo_bin;
+use std::{convert::TryInto, process::Command, thread, time::Duration, fs, path::PathBuf};
+
+mod common;
+
+#[test]
+#[cfg(unix)]
+fn purge_chain_works() {
+	use nix::sys::signal::{kill, Signal::SIGINT};
+	use nix::unistd::Pid;
+
+	let base_path = "purge_chain_test";
+
+	let _ = fs::remove_dir_all(base_path);
+	let mut cmd = Command::new(cargo_bin("polkadot"))
+		.args(&["--dev", "-d", base_path])
+		.spawn()
+		.unwrap();
+
+	// Let it produce some blocks.
+	thread::sleep(Duration::from_secs(30));
+	assert!(cmd.try_wait().unwrap().is_none(), "the process should still be running");
+
+	// Stop the process
+	kill(Pid::from_raw(cmd.id().try_into().unwrap()), SIGINT).unwrap();
+	assert!(common::wait_for(&mut cmd, 30).map(|x| x.success()).unwrap_or_default());
+
+	let status = Command::new(cargo_bin("polkadot"))
+		.args(&["purge-chain", "--dev", "-d", base_path, "-y"])
+		.status()
+		.unwrap();
+	assert!(status.success());
+
+	// Make sure that the `dev` chain folder exists, but the `db` is deleted.
+	assert!(PathBuf::from(base_path).join("chains/dev/").exists());
+	assert!(!PathBuf::from(base_path).join("chains/dev/db").exists());
+}
diff --git a/polkadot/tests/running_the_node_and_interrupt.rs b/polkadot/tests/running_the_node_and_interrupt.rs
new file mode 100644
index 0000000000..dc07c44713
--- /dev/null
+++ b/polkadot/tests/running_the_node_and_interrupt.rs
@@ -0,0 +1,48 @@
+// Copyright 2020 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+use assert_cmd::cargo::cargo_bin;
+use std::{convert::TryInto, process::Command, thread, time::Duration, fs};
+
+mod common;
+
+#[test]
+#[cfg(unix)]
+fn running_the_node_works_and_can_be_interrupted() {
+	use nix::sys::signal::{kill, Signal::{self, SIGINT, SIGTERM}};
+	use nix::unistd::Pid;
+
+	fn run_command_and_kill(signal: Signal) {
+		let _ = fs::remove_dir_all("interrupt_test");
+		let mut cmd = Command::new(cargo_bin("polkadot"))
+			.args(&["--dev", "-d", "interrupt_test"])
+			.spawn()
+			.unwrap();
+
+		thread::sleep(Duration::from_secs(30));
+		assert!(cmd.try_wait().unwrap().is_none(), "the process should still be running");
+		kill(Pid::from_raw(cmd.id().try_into().unwrap()), signal).unwrap();
+		assert_eq!(
+			common::wait_for(&mut cmd, 30).map(|x| x.success()),
+			Some(true),
+			"the pocess must exit gracefully after signal {}",
+			signal,
+		);
+	}
+
+	run_command_and_kill(SIGINT);
+	run_command_and_kill(SIGTERM);
+}