Add the tests of the spec generator to the unit tests

pkg/analyzer_plugin/test/test_all.dart

Index: pkg/analyzer_plugin/test/test_all.dart
diff --git a/pkg/analyzer_plugin/test/test_all.dart b/pkg/analyzer_plugin/test/test_all.dart
index 887935ee7e6ffe67df23774e312a9df031d98793..cea38501a535ce3f708ff595430c0b27901a88ad 100644
--- a/pkg/analyzer_plugin/test/test_all.dart
+++ b/pkg/analyzer_plugin/test/test_all.dart
@@ -4,6 +4,7 @@
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
+import '../tool/spec/check_all_test.dart' as check_spec;
 import 'plugin/test_all.dart' as plugin;
 import 'src/test_all.dart' as src;
 import 'utilities/test_all.dart' as utilities;
@@ -13,5 +14,15 @@ main() {
     plugin.main();
     src.main();
     utilities.main();
+    defineReflectiveSuite(() {
+      defineReflectiveTests(SpecTest);
+    }, name: 'spec');
   }, name: 'analyzer_plugin');
 }
+
+@reflectiveTest
+class SpecTest {
+  test_specHasBeenGenerated() {
+    check_spec.main();
+  }
+}