Add support for a global configuration file.

test/runner/configuration/global_test.dart

Index: test/runner/configuration/global_test.dart
diff --git a/test/runner/configuration/global_test.dart b/test/runner/configuration/global_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..07b2f82a676587d2927cb6cccf2ce6a0f059ca00
--- /dev/null
+++ b/test/runner/configuration/global_test.dart
@@ -0,0 +1,128 @@
+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+@TestOn("vm")
+
+import 'dart:convert';
+
+import 'package:scheduled_test/descriptor.dart' as d;
+import 'package:scheduled_test/scheduled_stream.dart';
+import 'package:scheduled_test/scheduled_test.dart';
+
+import 'package:test/src/util/exit_codes.dart' as exit_codes;
+
+import '../../io.dart';
+
+void main() {
+  useSandbox();
+
+  test("ignores an empty file", () {
+    d.file("global_test.yaml", "").create();
+
+    d.file("test.dart", """
+      import 'package:test/test.dart';
+
+      void main() {
+        test("success", () {});
+      }
+    """).create();
+
+    var test = runTest(["test.dart"], environment: {
+      "DART_TEST_CONFIG": "global_test.yaml"
+    });
+    test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+    test.shouldExit(0);
+  });
+
+  test("uses supported test configuration", () {
+    d.file("global_test.yaml", JSON.encode({
+      "verbose_trace": true
+    })).create();
+
+    d.file("test.dart", """
+      import 'package:test/test.dart';
+
+      void main() {
+        test("failure", () => throw "oh no");
+      }
+    """).create();
+
+    var test = runTest(["test.dart"], environment: {
+      "DART_TEST_CONFIG": "global_test.yaml"
+    });
+    test.stdout.expect(consumeThrough(contains("dart:isolate-patch")));
+    test.shouldExit(1);
+  });
+
+  test("uses supported runner configuration", () {
+    d.file("global_test.yaml", JSON.encode({
+      "reporter": "json"
+    })).create();
+
+    d.file("test.dart", """
+      import 'package:test/test.dart';
+
+      void main() {
+        test("success", () {});
+      }
+    """).create();
+
+    var test = runTest(["test.dart"], environment: {
+      "DART_TEST_CONFIG": "global_test.yaml"
+    });
+    test.stdout.expect(consumeThrough(contains('"testStart"')));
+    test.shouldExit(0);
+  });
+
+  test("local configuration takes precedence", () {
+    d.file("global_test.yaml", JSON.encode({
+      "verbose_trace": true
+    })).create();
+
+    d.file("dart_test.yaml", JSON.encode({
+      "verbose_trace": false
+    })).create();
+
+    d.file("test.dart", """
+      import 'package:test/test.dart';
+
+      void main() {
+        test("failure", () => throw "oh no");
+      }
+    """).create();
+
+    var test = runTest(["test.dart"], environment: {
+      "DART_TEST_CONFIG": "global_test.yaml"
+    });
+    test.stdout.expect(never(contains("dart:isolate-patch")));
+    test.shouldExit(1);
+  });
+
+  group("disallows local-only configuration:", () {
+    for (var field in ["skip", "test_on", "paths", "filename", "names",
+        "plain_names", "include_tags", "exclude_tags", "pub_serve", "tags",
+        "add_tags"]) {
+      test("rejects local-only configuration", () {
+        d.file("global_test.yaml", JSON.encode({field: null})).create();
+
+        d.file("test.dart", """
+          import 'package:test/test.dart';
+
+          void main() {
+            test("success", () {});
+          }
+        """).create();
+
+        var test = runTest(["test.dart"], environment: {
+          "DART_TEST_CONFIG": "global_test.yaml"
+        });
+        test.stderr.expect(containsInOrder([
+          "of global_test.yaml: $field isn't supported here.",
+          "^^"
+        ]));
+        test.shouldExit(exit_codes.data);
+      });
+    }
+  });
+}