1 files changed, 54 insertions, 0 deletions
diff --git a/support/src/test/java/tests/util/ForEachRunner.java b/support/src/test/java/tests/util/ForEachRunner.java
new file mode 100644
index 0000000..2c222b2
--- /dev/null
+++ b/support/src/test/java/tests/util/ForEachRunner.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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 tests.util;
+
+/**
+ * Runner which executes the provided code under test (via a callback) for each provided input
+ * value.
+ */
+public final class ForEachRunner {
+
+  /**
+   * Callback parameterized with a value.
+   */
+  public interface Callback<T> {
+    /**
+     * Invokes the callback for the provided value.
+     */
+    void run(T value) throws Exception;
+  }
+
+  private ForEachRunner() {}
+
+  /**
+   * Invokes the provided callback for each of the provided named values.
+   *
+   * @param namesAndValues named values represented as name-value pairs.
+   *
+   * @param <T> type of value.
+   */
+  public static <T> void runNamed(Callback<T> callback, Iterable<Pair<String, T>> namesAndValues)
+      throws Exception {
+    for (Pair<String, T> nameAndValue : namesAndValues) {
+      try {
+        callback.run(nameAndValue.getSecond());
+      } catch (Throwable e) {
+        throw new Exception("Failed for " + nameAndValue.getFirst() + ": " + e.getMessage(), e);
+      }
+    }
+  }
+}