test: enable missing feature for test build (#2820)

Add missing feature flags to fix `cargo test` when run inside individual
crate directories.

CI previously missed this issue because running `cargo nextest` from the
workspace root automatically unifies workspace features.

Additionally, because the `grpc-gcp` example depends on
`protoc-gen-rust-grpc` (unlike `tonic` examples), this PR removes
`grpc-gcp` from the default features so `cargo test` works out of the
box. Note that `examples` crate has no tests.

Author: arjan-bal

examples/Cargo.toml

@@ -291,11 +291,10 @@ grpc-gcp = [ "dep:protobuf", "dep:grpc-protobuf", "dep:grpc", "dep:grpc-google",
 "dep:rustls", "dep:protobuf-well-known-types" ]
 grpc-routeguide = ["dep:grpc", "dep:grpc-protobuf", "dep:protobuf", "dep:rand"]
 grpc-helloworld = ["dep:grpc", "dep:grpc-protobuf", "dep:protobuf"]
-full = ["gcp", "routeguide", "reflection", "autoreload", "health", "grpc-web",
+default = ["gcp", "routeguide", "reflection", "autoreload", "health", "grpc-web",
 "tracing", "uds", "streaming", "mock", "json-codec", "compression", "tls",
 "tls-rustls", "tls-client-auth", "types", "cancellation", "h2c",
-"grpc-routeguide", "grpc-helloworld", "grpc-gcp"]
-default = ["full"]
+"grpc-routeguide", "grpc-helloworld"]
 # Workaround for cargo-udeps bug.
 # TODO: Remove once the fix is released: https://github.com/est31/cargo-udeps/pull/338
 h2 = []

examples/README.md

@@ -100,7 +100,7 @@ Once your credentials are set up, you will need your GCP Project ID, which can
 be found on the main dashboard of the Google Cloud Console. With both of these
 ready, you can run the example like so:
 ```bash
-$ cargo run --bin grpc-gcp-client -- <project-id>
+$ cargo run --bin grpc-gcp-client --features grpc-gcp -- <project-id>
 ```
 
 [Application Default Credentials]: https://docs.cloud.google.com/docs/authentication/application-default-credentials

tonic-reflection/Cargo.toml

@@ -34,7 +34,7 @@ tonic-prost = { version = "0.14.6", path = "../tonic-prost", default-features =
 
 [dev-dependencies]
 tokio-stream = {version = "0.1", default-features = false, features = ["net"]}
-tonic = { version = "0.14.6", path = "../tonic", default-features = false, features = ["transport"] }
+tonic = { version = "0.14.6", path = "../tonic", default-features = false, features = ["transport", "router"] }
 
 [lints]
 workspace = true