Use boolean selector syntax for tags.

test/runner/tag_test.dart

Index: test/runner/tag_test.dart
diff --git a/test/runner/tag_test.dart b/test/runner/tag_test.dart
index 2af690c7dab026ff416224a85ad2a1ab2f655247..2dce70087c46f26c1f7ac6f988798388a35a543d 100644
--- a/test/runner/tag_test.dart
+++ b/test/runner/tag_test.dart
@@ -60,6 +60,15 @@ void main() {
       test.shouldExit(0);
     });
 
+    test("supports boolean selector syntax", () {
+      var test = runTest(["--tags=b || c", "test.dart"]);
+      test.stdout.expect(tagWarnings(['a']));
+      test.stdout.expect(consumeThrough(contains(": b")));
+      test.stdout.expect(consumeThrough(contains(": bc")));
+      test.stdout.expect(consumeThrough(contains("+2: All tests passed!")));
+      test.shouldExit(0);
+    });
+
     test("prints no warnings when all tags are specified", () {
       var test = runTest(["--tags=a,b,c", "test.dart"]);
       test.stdout.expect(consumeThrough(contains("No tests ran.")));
@@ -97,6 +106,16 @@ void main() {
       test.shouldExit(0);
     });
 
+    test("supports boolean selector syntax", () {
+      var test = runTest(["--exclude-tags=b && c", "test.dart"]);
+      test.stdout.expect(tagWarnings(['a']));
+      test.stdout.expect(consumeThrough(contains(": no tags")));
+      test.stdout.expect(consumeThrough(contains(": a")));
+      test.stdout.expect(consumeThrough(contains(": b")));
+      test.stdout.expect(consumeThrough(contains("+3: All tests passed!")));
+      test.shouldExit(0);
+    });
+
     test("prints no warnings when all tags are specified", () {
       var test = runTest(["--exclude-tags=a,b,c", "test.dart"]);
       test.stdout.expect(consumeThrough(contains(": no tags")));
@@ -135,22 +154,6 @@ void main() {
     });
   });
 
-  group('with --tags and --exclude-tags', () {
-    test('refuses to include and exclude the same tag simultaneously', () {
-      var test = runTest(["-t", "a,b", "-x", "a,b,c", "test.dart"]);
-      test.stderr.expect(consumeThrough(
-          contains("The tags a and b were both included and excluded.")));
-      test.shouldExit(64);
-    });
-
-    test("--exclude-tags takes precedence over --tags", () {
-      var test = runTest(["-t", "b", "-x", "c", "test.dart"]);
-      test.stdout.expect(consumeThrough(contains(": b")));
-      test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
-      test.shouldExit(0);
-    });
-  });
-
   test('respects top-level @Tags annotations', () {
     d.file("test.dart", """
       @Tags(const ['a'])