build(core): add bazel test targets for core (#21053)

- Add tests target for `test`, `test_node_only` and `test_web` in `core` package.
- Created a `_testing_init` pseudo package where bootstrap code for tests is kept.
- Moved `source_map_util` from `test` to `testing` so to prevent circular dependency.
- Removed `visibility:public` for testing `BUILD` packages.

PR Close #21053

packages/core/test/BUILD.bazel

@@ -1,6 +1,6 @@
 package(default_visibility = ["//visibility:public"])
 
-load("@build_bazel_rules_typescript//:defs.bzl", "ts_library")
+load("@build_bazel_rules_typescript//:defs.bzl", "ts_library", "ts_web_test")
 load("@build_bazel_rules_nodejs//:defs.bzl", "jasmine_node_test")
 
 ts_library(
@@ -8,7 +8,10 @@ ts_library(
     testonly = 1,
     srcs = glob(
         ["**/*.ts"],
-        exclude = ["render3/**/*.ts"],
+        exclude = [
+            "**/*_node_only_spec.ts",
+            "render3/**/*.ts",
+        ],
     ),
     tsconfig = "//packages:tsconfig",
     deps = [
@@ -17,7 +20,6 @@ ts_library(
         "//packages/animations/browser/testing",
         "//packages/common",
         "//packages/compiler",
-        "//packages/compiler/test",
         "//packages/compiler/testing",
         "//packages/core",
         "//packages/core/testing",
@@ -25,22 +27,48 @@ ts_library(
         "//packages/platform-browser-dynamic",
         "//packages/platform-browser/animations",
         "//packages/platform-browser/testing",
-        "//packages/platform-server",
         "//packages/router",
         "//packages/router/testing",
         "@rxjs",
     ],
 )
 
-# TODO(mhevery): re-enable when passing
+ts_library(
+    name = "test_node_only_lib",
+    testonly = 1,
+    srcs = glob(["**/*_node_only_spec.ts"]),
+    tsconfig = "//packages:tsconfig",
+    deps = [
+        ":test_lib",
+        "//packages/compiler",
+        "//packages/compiler/testing",
+        "//packages/core",
+        "//packages/core/testing",
+        "//packages/platform-server",
+        "//packages/platform-server/testing",
+    ],
+)
+
 jasmine_node_test(
     name = "test",
-    srcs = [],
-    bootstrap = [
-        "zone.js/dist/zone-node.js",
-    ],
-    tags = ["manual"],
+    bootstrap = ["angular_src/packages/_testing_init/init_node_spec.js"],
     deps = [
         ":test_lib",
+        ":test_node_only_lib",
+        "//packages/_testing_init:node",
+        "//packages/platform-server",
+        "//packages/platform-server/testing",
+    ],
+)
+
+ts_web_test(
+    name = "test_web",
+    bootstrap = [
+        "//:angular_bootstrap_scripts",
+    ],
+    # do not sort
+    deps = [
+        "//packages/_testing_init:browser",
+        ":test_lib",
     ],
 )