Pass arguments through to cargo test

docs/src/commands/build.md

@@ -59,7 +59,7 @@ wasm-pack build --target nodejs
 | Option    | Description                                                                                                     |
 |-----------|-----------------------------------------------------------------------------------------------------------------|
 | `nodejs`  | Outputs JS that uses CommonJS modules, for use with a `require` statement. `main` key in `package.json`. |
-| `nomodules`  | Outputs JS that use no modules. `browser` key in `package.json`. |
+| `no-modules`  | Outputs JS that use no modules. `browser` key in `package.json`. |
 | `browser` | Outputs JS that uses ES6 modules, primarily for use with `import` statements and/or bundlers such as `webpack`. `module` key in `package.json`. `sideEffects: false` by default. |
 
 ## Scope

docs/src/commands/test.md

@@ -0,0 +1,56 @@
+# wasm-pack test
+
+The `wasm-pack test` command wraps the [wasm-bindgen-test-runner](https://rustwasm.github.io/wasm-bindgen/wasm-bindgen-test/index.html)
+CLI allowing you to run wasm tests in different browsers without needing to install the different
+webdrivers yourself.
+
+```
+wasm-pack test --help
+```
+
+## Path
+
+The `wasm-pack test` command can be given an optional path argument.
+
+This path should point to a directory that contains a `Cargo.toml` file. If no
+path is given, the `test` command will run in the current directory.
+
+```
+# Run tests for the current directory's crate
+wasm-pack test
+
+# Run tests for a specified crate
+wasm-pack test crates/crate-in-my-workspace
+```
+
+## Profile
+
+The `test` command accepts an optional profile argument: `--release`.
+
+If none is supplied, then a debug test build will be used.
+
+## Test environment
+
+Choose where to run your tests by passing in any combination of testing environment flags.
+
+`--headless` is useful for running browser tests in a headless browser as part of a CI process.
+
+```
+wasm-pack test --node --firefox --chrome --safari --headless
+```
+
+## Extra options
+
+The `test` command can pass extra options straight to `cargo test` even if they are not
+supported in wasm-pack.
+
+To use them you should add standalone `--` argument at the very
+end of your command, and all the arguments you want to pass to cargo should go after.
+
+Here's an example of running only tests that contain the world "apple".
+
+```
+wasm-pack test --firefox --headless -- --manifest-path=crates/my-workspace-crate/Cargo.toml apple
+```
+
+`cargo test -h` for a list of all options that you can pass through.

src/build.rs

@@ -25,7 +25,7 @@ pub fn check_rustc_version(step: &Step) -> Result<String, Error> {
             } else {
                 Ok(mv.to_string())
             }
-        },
+        }
         None => bail!("We can't figure out what your Rust version is- which means you might not have Rust installed. Please install Rust version 1.30.0 or higher."),
     }
 }
@@ -95,6 +95,9 @@ pub fn cargo_build_wasm(
 }
 
 /// Run `cargo build --tests` targetting `wasm32-unknown-unknown`.
+///
+/// This generates the `Cargo.lock` file that we use in order to know which version of
+/// wasm-bindgen-cli to use when running tests.
 pub fn cargo_build_wasm_tests(path: &Path, debug: bool) -> Result<(), Error> {
     let mut cmd = Command::new("cargo");
     cmd.current_dir(path).arg("build").arg("--tests");

src/command/build.rs

@@ -19,7 +19,7 @@ use std::str::FromStr;
 use std::time::Instant;
 use PBAR;
 
-/// Everything required to configure and run the `wasm-pack init` command.
+/// Everything required to configure and run the `wasm-pack build` command.
 #[allow(missing_docs)]
 pub struct Build {
     pub crate_path: PathBuf,

src/command/test.rs

@@ -78,6 +78,10 @@ pub struct TestOptions {
     #[structopt(long = "release", short = "r")]
     /// Build with the release profile.
     pub release: bool,
+
+    #[structopt(last = true)]
+    /// List of extra options to pass to `cargo test`
+    pub extra_options: Vec<String>,
 }
 
 /// A configured `wasm-pack test` command.
@@ -96,6 +100,7 @@ pub struct Test {
     headless: bool,
     release: bool,
     test_runner_path: Option<PathBuf>,
+    extra_options: Vec<String>,
 }
 
 type TestStep = fn(&mut Test, &Step) -> Result<(), Error>;
@@ -115,6 +120,7 @@ impl Test {
             geckodriver,
             safari,
             safaridriver,
+            extra_options,
         } = test_opts;
 
         let crate_path = set_crate_path(path)?;
@@ -147,6 +153,7 @@ impl Test {
             headless,
             release,
             test_runner_path: None,
+            extra_options,
         })
     }
 
@@ -306,6 +313,7 @@ impl Test {
                 "CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUNNER",
                 &self.test_runner_path.as_ref().unwrap(),
             )),
+            &self.extra_options,
         )?;
         info!("Finished running tests in node.");
         Ok(())
@@ -349,7 +357,7 @@ impl Test {
             envs.push(("NO_HEADLESS", "1"));
         }
 
-        test::cargo_test_wasm(&self.crate_path, self.release, envs)?;
+        test::cargo_test_wasm(&self.crate_path, self.release, envs, &self.extra_options)?;
         Ok(())
     }
 
@@ -391,7 +399,7 @@ impl Test {
             envs.push(("NO_HEADLESS", "1"));
         }
 
-        test::cargo_test_wasm(&self.crate_path, self.release, envs)?;
+        test::cargo_test_wasm(&self.crate_path, self.release, envs, &self.extra_options)?;
         Ok(())
     }
 
@@ -430,7 +438,7 @@ impl Test {
             envs.push(("NO_HEADLESS", "1"));
         }
 
-        test::cargo_test_wasm(&self.crate_path, self.release, envs)?;
+        test::cargo_test_wasm(&self.crate_path, self.release, envs, &self.extra_options)?;
         Ok(())
     }
 }

src/test/mod.rs

@@ -10,7 +10,12 @@ use std::process::Command;
 
 /// Run `cargo test` with the `nightly` toolchain and targeting
 /// `wasm32-unknown-unknown`.
-pub fn cargo_test_wasm<I, K, V>(path: &Path, release: bool, envs: I) -> Result<(), failure::Error>
+pub fn cargo_test_wasm<I, K, V>(
+    path: &Path,
+    release: bool,
+    envs: I,
+    extra_options: &[String],
+) -> Result<(), failure::Error>
 where
     I: IntoIterator<Item = (K, V)>,
     K: AsRef<OsStr>,
@@ -23,6 +28,7 @@ where
         cmd.arg("--release");
     }
     cmd.arg("--target").arg("wasm32-unknown-unknown");
+    cmd.args(extra_options);
     child::run(cmd, "cargo test").context("Running Wasm tests with wasm-bindgen-test failed")?;
 
     // NB: `child::run` took care of ensuring that test output gets printed.