From c1fbb2d212c706691f0dfd01c04d7ed18dcfdded Mon Sep 17 00:00:00 2001
From: Miles Malerba <mmalerba@google.com>
Date: Mon, 29 Mar 2021 23:10:47 -0700
Subject: [PATCH] test(cdk/testing): start the e2e-app and run webdriver tests
 in bazel

This solution is temporary and linux-only. We should eventually replace
it with a more robust solution
---
 src/cdk/testing/tests/BUILD.bazel           | 27 ++++++++-----
 src/cdk/testing/tests/webdriver-test.sh     | 45 +++++++++++++++++++++
 src/cdk/testing/tests/webdriver.e2e.spec.ts |  7 ++--
 3 files changed, 67 insertions(+), 12 deletions(-)
 create mode 100755 src/cdk/testing/tests/webdriver-test.sh

diff --git a/src/cdk/testing/tests/BUILD.bazel b/src/cdk/testing/tests/BUILD.bazel
index 6c34924c0ade..68b74bf10829 100644
--- a/src/cdk/testing/tests/BUILD.bazel
+++ b/src/cdk/testing/tests/BUILD.bazel
@@ -94,7 +94,7 @@ ts_library(
 )
 
 jasmine_node_test(
-    name = "webdriver_node_test",
+    name = "webdriver_jasmine_node_test",
     data = [
         "@npm//:node_modules",
     ],
@@ -103,15 +103,24 @@ jasmine_node_test(
 )
 
 web_test(
-    name = "webdriver_test_chrome",
+    name = "webdriver_web_test_chrome",
     browser = "@npm//@angular/dev-infra-private/browsers/chromium:chromium",
-    tags = ["e2e"],
-    test = ":webdriver_node_test",
+    tags = ["manual"],
+    test = ":webdriver_jasmine_node_test",
 )
 
-web_test(
-    name = "webdriver_test_firefox",
-    browser = "@npm//@angular/dev-infra-private/browsers/firefox:firefox",
-    tags = ["e2e"],
-    test = ":webdriver_node_test",
+sh_test(
+    name = "webdriver_test_chrome",
+    testonly = 1,
+    srcs = ["webdriver-test.sh"],
+    args = [
+        "$(location //src/e2e-app:devserver)",
+        "$(location :webdriver_web_test_chrome)",
+    ],
+    data = [
+        ":webdriver_web_test_chrome",
+        "//src/e2e-app:devserver",
+    ],
+    tags = ["manual"],  # TODO(mmalerba): Change to "e2e" once this works on CI.
+    deps = ["@bazel_tools//tools/bash/runfiles"],
 )
diff --git a/src/cdk/testing/tests/webdriver-test.sh b/src/cdk/testing/tests/webdriver-test.sh
new file mode 100755
index 000000000000..9ad1c3452ca6
--- /dev/null
+++ b/src/cdk/testing/tests/webdriver-test.sh
@@ -0,0 +1,45 @@
+# Starts the e2e app on an open port and runs the tests against it.
+# TODO(mmalerba): Replace this with something that works on windows as well.
+
+# --- begin runfiles.bash initialization v2 ---
+# Copy-pasted from the Bazel Bash runfiles library v2.
+# https://github.com/bazelbuild/bazel/blob/master/tools/bash/runfiles/runfiles.bash#L54
+set -uo pipefail; f=bazel_tools/tools/bash/runfiles/runfiles.bash
+source "${RUNFILES_DIR:-/dev/null}/$f" 2>/dev/null || \
+ source "$(grep -sm1 "^$f " "${RUNFILES_MANIFEST_FILE:-/dev/null}" | cut -f2- -d' ')" \
+    2>/dev/null || \
+ source "$0.runfiles/$f" 2>/dev/null || \
+ source "$(grep -sm1 "^$f " "$0.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+ source "$(grep -sm1 "^$f " "$0.exe.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+ { echo>&2 "ERROR: cannot find $f"; exit 1; }; f=; set -e
+# --- end runfiles.bash initialization v2 ---
+
+# Save the commands passed from Bazel to start the server and run the tests.
+start_server="$1"
+run_tests="$2"
+
+# Find a random open port.
+# https://unix.stackexchange.com/questions/55913/whats-the-easiest-way-to-find-an-unused-local-port
+read lower_port upper_port < /proc/sys/net/ipv4/ip_local_port_range
+while :; do
+  port="$(shuf -i $lower_port-$upper_port -n 1)"
+  ss -lpn | grep -q ":$port " || break
+done
+
+# Start the e2e app server.
+"$(rlocation "angular_material/$start_server")" --port "$port" &
+server_pid="$!"
+
+# Wait for the server to bind to the port.
+while ! lsof "-i:$port" > /dev/null; do sleep 1; done
+
+# Run the tests.
+export E2E_APP_PORT="$port"
+"$(rlocation "angular_material/$run_tests")"
+result="$?"
+
+# Shutdown the server.
+kill -9 "$server_pid"
+
+# Exit with the test result.
+exit "$result"
diff --git a/src/cdk/testing/tests/webdriver.e2e.spec.ts b/src/cdk/testing/tests/webdriver.e2e.spec.ts
index dc24dfef00ce..4d8dae8b2d24 100644
--- a/src/cdk/testing/tests/webdriver.e2e.spec.ts
+++ b/src/cdk/testing/tests/webdriver.e2e.spec.ts
@@ -11,13 +11,14 @@ interface WebTestMetadata {
 }
 
 if (process.env['WEB_TEST_METADATA'] === undefined) {
-  console.log(`Test running outside of a "web_test" target. No browser found.`);
+  console.error(`Test running outside of a "web_test" target. No browser found.`);
   process.exit(1);
 }
 
 const runfiles = require(process.env['BAZEL_NODE_RUNFILES_HELPER']!);
 const webTestMetadata: WebTestMetadata =
     require(runfiles.resolve(process.env['WEB_TEST_METADATA']));
+const port = process.env['E2E_APP_PORT'];
 
 describe('Webdriver test', () => {
   let wd: WebDriver;
@@ -34,8 +35,8 @@ describe('Webdriver test', () => {
   });
 
   it('works', async () => {
-    await wd.get('data:text/html,Test');
+    await wd.get(`http://localhost:${port}`);
     const body = await wd.findElement(By.css('body'));
-    expect(await body.getText()).toBe('Test');
+    expect(await body.getText()).toBe('Toggle Navigation Links\ne2e website!\nI am a sibling!');
   });
 });