Update from Google.

--
MOE_MIGRATED_REVID=85702957

1 files changed, 53 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/testutil/CustomSuite.java b/src/test/java/com/google/devtools/build/lib/testutil/CustomSuite.java
new file mode 100644
index 0000000000..6e3b6c56ab
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/testutil/CustomSuite.java
@@ -0,0 +1,53 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.google.devtools.build.lib.testutil;
+
+import org.junit.runners.Suite;
+import org.junit.runners.model.RunnerBuilder;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.Set;
+
+/**
+ * A JUnit4 suite implementation that delegates the class finding to a {@code suite()} method on the
+ * annotated class. To be used in combination with {@link TestSuiteBuilder}.
+ */
+public final class CustomSuite extends Suite {
+
+  /**
+   * Only called reflectively. Do not use programmatically.
+   */
+  public CustomSuite(Class<?> klass, RunnerBuilder builder) throws Throwable {
+    super(builder, klass, getClasses(klass));
+  }
+
+  private static Class<?>[] getClasses(Class<?> klass) {
+    Set<Class<?>> result = evalSuite(klass);
+    return result.toArray(new Class<?>[result.size()]);
+  }
+
+  @SuppressWarnings("unchecked") // unchecked cast to a generic type
+  private static Set<Class<?>> evalSuite(Class<?> klass) {
+    try {
+      Method m = klass.getMethod("suite");
+      if (!Modifier.isStatic(m.getModifiers())) {
+        throw new IllegalStateException("suite() must be static");
+      }
+      return (Set<Class<?>>) m.invoke(null);
+    } catch (Exception e) {
+      throw new IllegalStateException(e);
+    }
+  }
+}