1 files changed, 79 insertions, 0 deletions
diff --git a/libraries/longevity/tests/src/android/platform/longevity/scheduler/IterateTest.java b/libraries/longevity/tests/src/android/platform/longevity/scheduler/IterateTest.java
new file mode 100644
index 000000000..6aa17c10b
--- /dev/null
+++ b/libraries/longevity/tests/src/android/platform/longevity/scheduler/IterateTest.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2017 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 android.platform.longevity.scheduler;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.when;
+
+import android.os.Bundle;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+import org.junit.Test;
+import org.junit.runner.Description;
+import org.junit.runner.Runner;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import org.mockito.Mockito;
+
+/**
+ * Unit test the logic for {@link Iterate}
+ */
+@RunWith(JUnit4.class)
+public class IterateTest {
+    private static final int NUM_TESTS = 10;
+    private static final int TEST_ITERATIONS = 25;
+
+    private Iterate mIterate = new Iterate();
+
+    /**
+     * Unit test the iteration count is respected.
+     */
+    @Test
+    public void testIterationsRespected() {
+        // Construct argument bundle.
+        Bundle args = new Bundle();
+        args.putString(Iterate.OPTION_NAME, String.valueOf(TEST_ITERATIONS));
+        // Construct input runners.
+        List<Runner> input = new ArrayList<>();
+        IntStream.range(1, NUM_TESTS).forEach(i -> input.add(getMockRunner(i)));
+        // Apply iterator on arguments and runners.
+        List<Runner> output = mIterate.apply(args, input);
+        // Count occurrences of test descriptions into a map.
+        Map<String, Long> countMap = output.stream()
+            .map(Runner::getDescription)
+                .map(Description::getDisplayName)
+                    .collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));
+        // Ensure all test descriptions have N entries.
+        boolean respected = countMap.entrySet().stream()
+            .noneMatch(entry -> (entry.getValue() != TEST_ITERATIONS));
+        assertThat(respected).isTrue();
+    }
+
+    private Runner getMockRunner (int id) {
+        Runner result = Mockito.mock(Runner.class);
+        Description desc = Mockito.mock(Description.class);
+        when(result.getDescription()).thenReturn(desc);
+        when(desc.getDisplayName()).thenReturn(String.valueOf(id));
+        return result;
+    }
+}