Add setup action interface

base/test/android/javatests/src/org/chromium/base/test/SetUpStatement.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.rules.TestRule;
+import org.junit.runners.model.Statement;
+
+/**
+ * Custom Statement for SetUpTestRules.
+ *
+ * The statment calls {@link SetUpTestRule#setUp} before test run based on

[jbudorick, 2017/04/10 19:08:45]

rephrase: Calls {@link SetUpTestRule.setUp()} before evaluating {@link ...#base}
if {@link ...#shouldSetUp} is true.

[the real yoland, 2017/04/12 00:52:34]

Done

+ * {@link SetUpTestRule#shouldSetUp} argument
+ */
+public class SetUpStatement extends Statement {
+    private final Statement mBase;
+    private final SetUpTestRule<? extends TestRule> mSetUpTestRule;
+    private final boolean mShouldSetUp;
+
+    public SetUpStatement(
+            final Statement base, SetUpTestRule<? extends TestRule> callback, boolean shouldSetUp) {
+        mBase = base;
+        mSetUpTestRule = callback;
+        mShouldSetUp = shouldSetUp;
+    }
+
+    @Override
+    public void evaluate() throws Throwable {
+        if (mShouldSetUp) {
+            mSetUpTestRule.setUp();
+        }
+        mBase.evaluate();
+    }
+}