test(core): add a symbols test for renderer2 code

packages/core/test/bundling/hello_world_r2/BUILD.bazel

@@ -0,0 +1,69 @@
+package(default_visibility = ["//visibility:public"])
+
+load("//tools:defaults.bzl", "ts_library", "ng_module")
+load("//tools/symbol-extractor:index.bzl", "js_expected_symbol_test")
+load("//packages/bazel/src:ng_rollup_bundle.bzl", "ng_rollup_bundle")
+load("@build_bazel_rules_nodejs//:defs.bzl", "jasmine_node_test")
+load("@build_bazel_rules_typescript//:defs.bzl", "ts_devserver")
+
+ng_module(
+    name = "hello_world",
+    srcs = ["index.ts"],
+    deps = [
+        "//packages/core",
+        "//packages/platform-browser-dynamic",
+    ],
+)
+
+ng_rollup_bundle(
+    name = "bundle",
+    # TODO(alexeagle): This is inconsistent.
+    # We try to teach users to always have their workspace at the start of a
+    # path, to disambiguate from other workspaces.
+    # Here, the rule implementation is looking in an execroot where the layout
+    # has an "external" directory for external dependencies.
+    # This should probably start with "angular/" and let the rule deal with it.
+    entry_point = "packages/core/test/bundling/hello_world_r2/index.js",
+    deps = [
+        ":hello_world",
+        "//packages/core",
+        "//packages/platform-browser-dynamic",
+    ],
+)
+
+ts_library(
+    name = "test_lib",
+    testonly = 1,
+    srcs = glob(["*_spec.ts"]),
+    deps = [
+        "//packages:types",
+        "//packages/core/testing",
+    ],
+)
+
+jasmine_node_test(
+    name = "test",
+    data = [
+        ":bundle",
+        ":bundle.js",
+        ":bundle.min.js.brotli",
+        ":bundle.min_debug.js",
+    ],
+    deps = [":test_lib"],
+)
+
+js_expected_symbol_test(
+    name = "symbol_test",
+    src = ":bundle.min_debug.js",
+    golden = ":bundle.golden_symbols.json",
+)
+
+ts_devserver(
+    name = "devserver",
+    static_files = [
+        ":bundle.min_debug.js",
+        ":bundle.min.js",
+        "index.html",
+    ],
+    deps = [],
+)