Create separate bazel test target for each directory's template test

Previously, running the entire template test suite took about twelve
minutes. In order to speed this up, test top level directories as
individual test targets that can be run in parallel.

It now takes about 4 minutes to run everything (on a Macbook Pro)

Documentation updated as well, as commands have changed.

Change-Id: Ie815a7fafc64b442f36b92d0d295f8cfbe12cc0d

polygerrit-ui/README.md

@@ -176,10 +176,19 @@ npm install -g typescript fried-twinkie
 To run on all files, execute the following command:
 
 ```sh
-bazel test //polygerrit-ui/app:template_test
+bazel test //polygerrit-ui/app:all --test_tag_filters=template --test_output errors
 ```
 
-To run on a specific file (ex: gr-list-view), execute the following command:
+To run on a specific top level directory (ex: change-list)
 ```sh
-bazel test //polygerrit-ui/app:template_test --test_arg=gr-list-view
+bazel test //polygerrit-ui/app:template_test_change-list --test_output errors
+```
+
+To run on a specific file (ex: gr-change-list-view), execute the following command:
+```sh
+bazel test //polygerrit-ui/app:template_test_<TOP_LEVEL_DIRECTORY> --test_arg=<VIEW_NAME> --test_output errors
+```
+
+```sh
+bazel test //polygerrit-ui/app:template_test_change-list --test_arg=gr-change-list-view  --test_output errors
 ```

polygerrit-ui/app/BUILD

@@ -125,21 +125,33 @@ sh_test(
     ],
 )
 
-sh_test(
-    name = "template_test",
+DIRECTORIES = [
+    "change",
+    "change-list",
+    "core",
+    "diff",
+    "plugins",
+    "settings",
+    "shared",
+    "gr-app",
+]
+
+[sh_test(
+    name = "template_test_" + directory,
     size = "large",
     srcs = ["template_test.sh"],
+    args = [directory],
     data = [
         ":pg_code",
         ":template_test_srcs",
         "//polygerrit-ui:polygerrit_components.bower_components.zip",
     ],
-    # Should not run sandboxed.
     tags = [
+        # Should not run sandboxed.
         "local",
-        "manual",
+        "template",
     ],
-)
+) for directory in DIRECTORIES]
 
 # Embed bundle
 polygerrit_bundle(

polygerrit-ui/app/template_test.sh

@@ -35,4 +35,4 @@ export NODE_PATH=$(get_node_path)
 unzip -o polygerrit-ui/polygerrit_components.bower_components.zip -d polygerrit-ui/app
 python $TEST_SRCDIR/gerrit/polygerrit-ui/app/template_test_srcs/convert_for_template_tests.py
 # Pass a file name argument from the --test_args (example: --test_arg=gr-list-view)
-${node_bin} $TEST_SRCDIR/gerrit/polygerrit-ui/app/template_test_srcs/template_test.js $1
+${node_bin} $TEST_SRCDIR/gerrit/polygerrit-ui/app/template_test_srcs/template_test.js $1 $2

polygerrit-ui/app/template_test_srcs/convert_for_template_tests.py

@@ -55,7 +55,8 @@ def writeTempFile(file, root):
   if "gr-reporting" in file:
     return
   if not root in elements:
-    elements[root] = {}
+    # gr-app doesn't have an additional level
+    elements[root] = {"directory": 'gr-app' if len(root.split("/")) < 4 else root.split("/")[3]}
   if file.endswith(".html") and not file.endswith("_test.html"):
     # gr-navigation is treated like a behavior rather than a standard element
     # because of the way it added to the Gerrit object.

polygerrit-ui/app/template_test_srcs/template_test.js

@@ -45,8 +45,21 @@ fs.readdir('./polygerrit-ui/temp/behaviors/', (err, data) => {
   let mappings = JSON.parse(fs.readFileSync(
       `./polygerrit-ui/temp/map.json`, 'utf-8'));
 
+  // The directory is passed as arg2 by the test target.
+  const directory = process.argv[2];
+  if (directory) {
+    const mappingSpecificDirectory = {};
+
+    for (key of Object.keys(mappings)) {
+      if (directory === mappings[key].directory) {
+        mappingSpecificDirectory[key] = mappings[key];
+      }
+    }
+    mappings = mappingSpecificDirectory;
+  }
+
   // If a particular file was passed by the user, don't test everything.
-  const file = process.argv[2];
+  const file = process.argv[3];
   if (file) {
     const mappingSpecificFile = {};
     for (key of Object.keys(mappings)) {