Put integration tests behind feature flag (#515)

* subxt: Add integration-tests feature flag

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Guard integration tests under feature flag

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* test-runtime: Place build.rs under feature flag

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Pass `integration-tests` feature to `test-runtime`

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* CI: Use `integration-tests` feature to run all tests

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Rely on `#[cfg(feature = "integration-tests")]` for integration

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt/metadata: Manually construct test metadata

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* artifacts: Move scale binary blob to dedicated folder

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* examples: Update path to metadata blob

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* metadata: Rely on artifact metadata blob for benches

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* metadata: Remove `test-runtime` dependency

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* examples: Modify runtime path for `custom_type_derives`

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Remove tests folder

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* test-runtime: Remove `integration-tests` feature flag

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* integration-tests: Add an integration test crate for subxt

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Remove `test-runtime` dependency

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Add comment for feature flags

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* integration-tests: Trim dependencies

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* integration-tests: Move dependencies under dev

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Revert "CI: Use `integration-tests` feature to run all tests"

This reverts commit 8e5f38ba8c633ac40420fadf58700ac402f762d4.

* integration-tests: Remove integration folder

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Fix feature flag and test comment

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Extra feature flag comment

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* integration-tests: Move tests content under src

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

metadata/Cargo.toml

@@ -21,7 +21,6 @@ sp-core = { version = "6.0.0"  }
 bitvec = { version = "1.0.0", default-features = false, features = ["alloc"] }
 criterion = "0.3"
 scale-info = { version = "2.0.0", features = ["bit-vec"] }
-test-runtime = { path = "../test-runtime" }
 
 [lib]
 # Without this, libtest cli opts interfere with criteron benches:

metadata/benches/bench.rs

@@ -26,6 +26,10 @@ use scale_info::{
     TypeDef,
     TypeDefVariant,
 };
+use std::{
+    fs,
+    path::Path,
+};
 use subxt_metadata::{
     get_call_hash,
     get_constant_hash,
@@ -35,7 +39,8 @@ use subxt_metadata::{
 };
 
 fn load_metadata() -> RuntimeMetadataV14 {
-    let bytes = test_runtime::METADATA;
+    let bytes = fs::read(Path::new("../artifacts/polkadot_metadata.scale"))
+        .expect("Cannot read metadata blob");
     let meta: RuntimeMetadataPrefixed =
         Decode::decode(&mut &*bytes).expect("Cannot decode scale metadata");