Expose resources in Robolectric/JUnit tests.

build/config/android/internal_rules.gni

Index: build/config/android/internal_rules.gni
diff --git a/build/config/android/internal_rules.gni b/build/config/android/internal_rules.gni
index e4a4e2d1f6fc59e6ee3bef81c3e738ba0de107da..609feba94caad74c72755fc2d788734878c07fc7 100644
--- a/build/config/android/internal_rules.gni
+++ b/build/config/android/internal_rules.gni
@@ -87,7 +87,7 @@ template("write_build_config") {
            type == "android_resources" || type == "deps_dex" ||
            type == "dist_jar" || type == "android_assets" ||
            type == "resource_rewriter" || type == "java_binary" ||
-           type == "group" || type == "java_prebuilt")
+           type == "group" || type == "java_prebuilt" || type == "junit_binary")
 
     forward_variables_from(invoker,
                            [
@@ -564,10 +564,40 @@ template("test_runner_script") {
       }
     } else if (_test_type == "junit") {
       assert(defined(invoker.test_suite))
+
       test_runner_args += [
         "--test-suite",
         invoker.test_suite,
       ]
+      if (defined(invoker.android_manifest_path)) {
+        test_runner_args += [
+          "--android-manifest-path",
+          rebase_path(invoker.android_manifest_path, root_build_dir),
+        ]
+      }
+
+      if (defined(invoker.package_name)) {
+        test_runner_args += [
+          "--package-name",
+          invoker.package_name,
+        ]
+
+        deps += [ ":${invoker.test_suite}__build_config" ]

[jbudorick, 2017/04/11 19:55:05]

Do these 8 lines need to be in the invoker.package_name block?

[mikecase (-- gone --), 2017/04/11 21:30:53]

So, technically no. But the way things are currently setup, robolectric will
never find the resources if the package name is not specified because it will
look for them in the wrong place (it will look at the default package which is
like org.robolectric.default or something which doesnt have an R.java file)).

I may look to improve this in the future, but for the time being, everything
works reasonably in my opinion. You just have to be sure to specify the package
name.

+        _junit_binary_build_config =
+            "${target_gen_dir}/${invoker.test_suite}.build_config"
+        _rebased_build_config =
+            rebase_path("$_junit_binary_build_config", root_build_dir)
+        test_runner_args += [
+          "--resource-zips",
+          "@FileArg($_rebased_build_config:resources:dependency_zips)",
+        ]
+      }
+
+      test_runner_args += [
+        "--robolectric-runtime-deps-dir",
+        rebase_path("$root_build_dir/lib.java/third_party/robolectric",
+                    root_build_dir),
+      ]
     } else if (_test_type == "linker") {
       test_runner_args += [
         "--test-apk",