From a3cd8e00d235126ba04d75cf18d751b8a445c0f2 Mon Sep 17 00:00:00 2001
From: 4meta5 <asinghchrony@protonmail.com>
Date: Mon, 27 Nov 2023 19:15:48 -0500
Subject: [PATCH] init

---
 Cargo.lock                  |  1 +
 runtime/Cargo.toml          |  4 ++++
 runtime/tests/common/mod.rs | 15 +++++++++++++++
 runtime/tests/fee.rs        | 22 ++++++++++++++++++++++
 4 files changed, 42 insertions(+)
 create mode 100644 runtime/tests/common/mod.rs
 create mode 100644 runtime/tests/fee.rs

diff --git a/Cargo.lock b/Cargo.lock
index 1b34d10..1379c12 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7401,6 +7401,7 @@ dependencies = [
  "sp-core",
  "sp-genesis-builder",
  "sp-inherents",
+ "sp-io",
  "sp-offchain",
  "sp-runtime",
  "sp-session",
diff --git a/runtime/Cargo.toml b/runtime/Cargo.toml
index e165a39..6f33f25 100644
--- a/runtime/Cargo.toml
+++ b/runtime/Cargo.toml
@@ -81,6 +81,9 @@ cumulus-primitives-utility = { git = "https://github.com/paritytech/polkadot-sdk
 pallet-collator-selection = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.3.0", default-features = false }
 parachain-info = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.3.0", default-features = false }
 
+[dev-dependencies]
+sp-io = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.3.0" }
+
 [features]
 default = ["std"]
 std = [
@@ -99,6 +102,7 @@ std = [
 	"frame-system-benchmarking?/std",
 	"frame-system-rpc-runtime-api/std",
 	"frame-system/std",
+	"pallet-proxy/std",
 	"frame-try-runtime?/std",
 	"log/std",
 	"pallet-aura/std",
diff --git a/runtime/tests/common/mod.rs b/runtime/tests/common/mod.rs
new file mode 100644
index 0000000..4a022bd
--- /dev/null
+++ b/runtime/tests/common/mod.rs
@@ -0,0 +1,15 @@
+// ExtBuilder impl for all runtime integration tests
+use frame_support::weights::Weight;
+use parachain_template_runtime::{BuildStorage, Runtime, System};
+
+pub fn run_with_system_weight<F>(w: Weight, mut assertions: F)
+where
+    F: FnMut() -> (),
+{
+    let mut t: sp_io::TestExternalities =
+        frame_system::GenesisConfig::<Runtime>::default().build_storage().unwrap().into();
+    t.execute_with(|| {
+        System::set_block_consumed_resources(w, 0);
+        assertions()
+    });
+}
\ No newline at end of file
diff --git a/runtime/tests/fee.rs b/runtime/tests/fee.rs
new file mode 100644
index 0000000..f6a0474
--- /dev/null
+++ b/runtime/tests/fee.rs
@@ -0,0 +1,22 @@
+// Integration transaction fee tests i.e. adjusts to block saturation
+mod common;
+use common::*;
+use frame_support::pallet_prelude::*;
+use parachain_template_runtime::{Runtime, RuntimeBlockWeights};
+use polkadot_runtime_common::MinimumMultiplier;
+use sp_runtime::{traits::Convert, Perquintill};
+
+#[test]
+fn multiplier_can_grow_from_zero() {
+    let minimum_multiplier = MinimumMultiplier::get();
+    let target = Perquintill::from_percent(25)
+        * RuntimeBlockWeights::get().get(DispatchClass::Normal).max_total.unwrap();
+    // if the min is too small, then this will not change, and we are doomed forever.
+    // the weight is 1/100th bigger than target.
+    run_with_system_weight(target * 101 / 100, || {
+        let next = <Runtime as pallet_transaction_payment::Config>::FeeMultiplierUpdate::convert(
+            minimum_multiplier,
+        );
+        assert!(next > minimum_multiplier, "{:?} !>= {:?}", next, minimum_multiplier);
+    })
+}