Run Chrome headless tests on CI

Closes #622

.travis.yml

@@ -12,7 +12,12 @@ INSTALL_GECKODRIVER: &INSTALL_GECKODRIVER
   |
     curl --retry 5 -LO https://github.com/mozilla/geckodriver/releases/download/v0.21.0/geckodriver-v0.21.0-linux64.tar.gz
     tar xf geckodriver-v0.21.0-linux64.tar.gz
-    export GECKODRIVER=`pwd`/geckodriver
+
+INSTALL_CHROMEDRIVER: &INSTALL_CHROMEDRIVER
+  |
+    curl --retry 5 -LO https://chromedriver.storage.googleapis.com/2.41/chromedriver_linux64.zip
+    unzip chromedriver_linux64.zip
+    export CHROMEDRIVER_ARGS=--verbose
 
 DEPLOY_TO_GITHUB: &DEPLOY_TO_GITHUB
   before_deploy:
@@ -78,10 +83,14 @@ matrix:
       install:
         - *INSTALL_NODE_VIA_NVM
         - *INSTALL_GECKODRIVER
+        - *INSTALL_CHROMEDRIVER
       script:
-        - cargo test -p web-sys --target wasm32-unknown-unknown
+        - export RUST_LOG=wasm_bindgen_test_runner
+        - CHROMEDRIVER=`pwd`/chromedriver cargo test -p web-sys --target wasm32-unknown-unknown
+        - GECKODRIVER=`pwd`/geckodriver cargo test -p web-sys --target wasm32-unknown-unknown
       addons:
         firefox: latest
+        chrome: stable
       if: branch = master
 
     # The `js-sys` crate's tests pass on nightly.
@@ -90,10 +99,14 @@ matrix:
       install:
         - *INSTALL_NODE_VIA_NVM
         - *INSTALL_GECKODRIVER
+        - *INSTALL_CHROMEDRIVER
       script:
-        - cargo test -p js-sys --target wasm32-unknown-unknown
+        - export RUST_LOG=wasm_bindgen_test_runner
+        - CHROMEDRIVER=`pwd`/chromedriver cargo test -p js-sys --target wasm32-unknown-unknown
+        - GECKODRIVER=`pwd`/geckodriver cargo test -p js-sys --target wasm32-unknown-unknown
       addons:
         firefox: latest
+        chrome: stable
       if: branch = master
 
     # Tests pass on nightly using yarn

crates/cli/src/bin/wasm-bindgen-test-runner/headless.rs

@@ -300,6 +300,16 @@ impl Client {
                 }
                 let request = json!({
                     "desiredCapabilities": {
+                        "goog:chromeOptions": {
+                            "args": [
+                                "headless",
+                                // See https://stackoverflow.com/questions/50642308/
+                                // for what this funky `disable-dev-shm-usage`
+                                // option is
+                                "disable-dev-shm-usage",
+                                "no-sandbox",
+                            ],
+                        },
                     }
                 });
                 let x: Response = self.post("/session", &request)?;