Followup test for checking propagated documentation (#514)

* codegen: Composite fields docs

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

* codegen: Propagate docs for Event type

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

* codegen: Propagate docs for calls module

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

* subxt: Update polkadot.rs

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

* codegen: Propagate documentation for `TypeDefGenKind::Enum` kind

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

* subxt: Update polkadot.rs

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

* codegen/tests: Recursively obtain raw metadata documentation

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

* codegen/tests: Generate runtime interface from node metadata

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

* codegen/tests: Obtain documentation from generated runtime API

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

* codegen/tests: Match raw documentation with the generated one

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

* Revert not longer needed "codegen: Composite fields docs"

This reverts commit 5460bbafc6262ac4f53e11d4ef11e44e1ce8296f.

* codegen/tests: Improve test regex documentation

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

* 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.

* codegen: Move documentation test to integration crate

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

* codegen_documentation: Add license + fmt

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

* Update `polkadot.rs`

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

* Move test under `testing` folder

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

* Update testing/integration-tests/src/codegen/codegen_documentation.rs

Co-authored-by: Tarik Gul <47201679+TarikGul@users.noreply.github.com>

Co-authored-by: Tarik Gul <47201679+TarikGul@users.noreply.github.com>

testing/integration-tests/Cargo.toml

@@ -20,11 +20,14 @@ codec = { package = "parity-scale-codec", version = "3.0.0", default-features =
 frame-metadata = "15.0.0"
 futures = "0.3.13"
 hex = "0.4.3"
+regex = "1.5.0"
 scale-info = { version = "2.0.0", features = ["bit-vec"] }
 sp-core = { version = "6.0.0", default-features = false  }
 sp-keyring = "6.0.0"
 sp-runtime = "6.0.0"
+syn = "1.0.0"
 subxt = { version = "0.21.0", path = "../../subxt" }
+subxt-codegen = { version = "0.21.0", path = "../../codegen" }
 test-runtime = { path = "../test-runtime" }
 tokio = { version = "1.8", features = ["macros", "time"] }
 tracing = "0.1.34"