Add setup action interface

base/test/android/junit/src/org/chromium/base/test/SetUpStatementTest.java

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.base.test;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.rules.TestRule;
+import org.junit.runner.RunWith;
+import org.junit.runners.BlockJUnit4ClassRunner;
+import org.junit.runners.model.Statement;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Test SetUpStatement is working as intended with SetUpTestRule.
+ */
+@RunWith(BlockJUnit4ClassRunner.class)
+public class SetUpStatementTest {
+    private Statement mBase;
+    private SetUpTestRule<TestRule> mRule;
+    private List<Integer> mList;
+
+    @Before
+    public void setUp() {
+        mBase = new Statement() {
+            @Override
+            public void evaluate() {
+                mList.add(1);
+            }
+        };
+        mList = new ArrayList<>();
+        mRule = new SetUpTestRule<TestRule>() {
+            @Override
+            public void setUp() {
+                mList.add(0);
+            }
+
+            @Override
+            public TestRule shouldSetUp(boolean toSetUp) {
+                return null;
+            }
+        };
+    }
+
+    @Test
+    public void testSetUpStatementShouldSetUp() throws Throwable {
+        SetUpStatement statement = new SetUpStatement(mBase, mRule, true);
+        statement.evaluate();
+        Integer[] expected = {0, 1};
+        Assert.assertArrayEquals(expected, mList.toArray());
+    }
+
+    @Test
+    public void testSetUpStatementShouldNotSetUp() throws Throwable {
+        SetUpStatement statement = new SetUpStatement(mBase, mRule, false);
+        statement.evaluate();
+        Integer[] expected = {1};
+        Assert.assertArrayEquals(expected, mList.toArray());
+    }
+}