diff --git a/robolectric.gradle b/robolectric.gradle
new file mode 100644
index 0000000..9521018
--- /dev/null
+++ b/robolectric.gradle
@@ -0,0 +1,50 @@
+android.testOptions.unitTests.all {
+    // configure the set of classes for JUnit tests
+    include project.hasProperty("testFilter") ? "**/*${project.ext.testFilter}*Test.class" : '**/*Test.class'
+    exclude '**/espresso/**/*.class'
+
+    // configure max heap size of the test JVM
+    maxHeapSize = '2048m'
+
+    // configure the test JVM arguments
+    jvmArgs '-XX:MaxPermSize=512m', '-XX:-UseSplitVerifier'
+
+    // Specify max number of processes (default is 1)
+    maxParallelForks = 1
+
+    // Specify max number of test classes to execute in a test process
+    // before restarting the process (default is unlimited)
+    forkEvery = 150
+
+    // configure whether failing tests should fail the build
+    ignoreFailures false
+
+    testLogging {
+        events 'passed', 'skipped', 'failed', 'standardOut', 'standardError'
+    }
+}
+
+ext {
+    assertjVersion = '1.1.1'
+    robolectricVersion = '3.0'
+}
+
+dependencies {
+    testCompile "org.robolectric:robolectric:$robolectricVersion",
+            "org.robolectric:shadows-support-v4:$robolectricVersion",
+            'org.mockito:mockito-core:1.9.5+',
+            'junit:junit:4.12'
+    testCompile("com.squareup.assertj:assertj-android:$assertjVersion") {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    }
+    testCompile("com.squareup.assertj:assertj-android-support-v4:$assertjVersion") {
+        exclude group: 'com.android.support', module: 'support-annotations'
+        exclude group: 'com.android.support', module: 'support-v4'
+        // see robolectric/robolectric#1633
+    }
+    testCompile("com.squareup.assertj:assertj-android-appcompat-v7:$assertjVersion") {
+        exclude group: 'com.android.support', module: 'support-annotations'
+        exclude group: 'com.android.support', module: 'appcompat-v7'
+        // see robolectric/robolectric#1633
+    }
+}
\ No newline at end of file
diff --git a/stacklibrary/build.gradle b/stacklibrary/build.gradle
index a42c23f..96e4607 100644
--- a/stacklibrary/build.gradle
+++ b/stacklibrary/build.gradle
@@ -24,8 +24,8 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:23.4.0'
+    apply from: "${rootProject.getRootDir()}/robolectric.gradle"
 }
 
 
diff --git a/stacklibrary/src/main/res/layout/activity_main.xml b/stacklibrary/src/main/res/layout/activity_main.xml
new file mode 100644
index 0000000..eaacbaa
--- /dev/null
+++ b/stacklibrary/src/main/res/layout/activity_main.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:textSize="40sp"
+        android:textColor="@android:color/black"
+        android:text="HomeFragment"/>
+    <Button
+        android:id="@+id/standard"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="standard"
+        android:layout_marginBottom="187dp"
+        android:layout_alignParentBottom="true"
+        android:layout_centerHorizontal="true" />
+    <Button
+        android:id="@+id/single_top"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="single_top"
+        android:layout_alignTop="@+id/standard"
+        android:layout_alignLeft="@+id/standard"
+        android:layout_alignStart="@+id/standard"
+        android:layout_marginTop="56dp" />
+    <Button
+        android:id="@+id/single_task"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="single_task"
+        android:layout_below="@+id/single_top"
+        android:layout_centerHorizontal="true" />
+    <Button
+        android:id="@+id/single_instance"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="single_instance"
+        android:layout_below="@+id/single_task"
+        android:layout_centerHorizontal="true" />
+</RelativeLayout>
\ No newline at end of file
diff --git a/stacklibrary/src/test/java/com/mrwang/stacklibrary/CustomBuildConfig.java b/stacklibrary/src/test/java/com/mrwang/stacklibrary/CustomBuildConfig.java
new file mode 100644
index 0000000..6c44bfd
--- /dev/null
+++ b/stacklibrary/src/test/java/com/mrwang/stacklibrary/CustomBuildConfig.java
@@ -0,0 +1,29 @@
+package com.mrwang.stacklibrary;
+
+/*
+ * Copyright Farble Dast. 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.
+ */
+
+/**
+ * Created by dell on 2015/12/23.
+ */
+public class CustomBuildConfig {
+    public static final boolean DEBUG = BuildConfig.DEBUG;
+    public static final String APPLICATION_ID = "com.mrwang.stacklibrary";
+    public static final String BUILD_TYPE = BuildConfig.BUILD_TYPE;
+    public static final String FLAVOR = BuildConfig.FLAVOR;
+    public static final int VERSION_CODE = BuildConfig.VERSION_CODE;
+    public static final String VERSION_NAME = BuildConfig.VERSION_NAME;
+}
diff --git a/stacklibrary/src/test/java/com/mrwang/stacklibrary/CustomRobolectricGradleTestRunner.java b/stacklibrary/src/test/java/com/mrwang/stacklibrary/CustomRobolectricGradleTestRunner.java
new file mode 100644
index 0000000..4d75b72
--- /dev/null
+++ b/stacklibrary/src/test/java/com/mrwang/stacklibrary/CustomRobolectricGradleTestRunner.java
@@ -0,0 +1,23 @@
+package com.mrwang.stacklibrary;
+
+import org.junit.runners.model.InitializationError;
+import org.robolectric.RobolectricGradleTestRunner;
+import org.robolectric.annotation.Config;
+import org.robolectric.manifest.AndroidManifest;
+
+/**
+ * Created by dell on 2016/7/19.
+ */
+public class CustomRobolectricGradleTestRunner extends RobolectricGradleTestRunner {
+
+    public CustomRobolectricGradleTestRunner(Class<?> klass) throws InitializationError {
+        super(klass);
+    }
+
+    @Override
+    protected AndroidManifest getAppManifest(Config config) {
+        AndroidManifest androidManifest = super.getAppManifest(config);
+        androidManifest.setPackageName("com.mrwang.stacklibrary");
+        return androidManifest;
+    }
+}
diff --git a/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/RootFragmentIml.java b/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/RootFragmentIml.java
new file mode 100644
index 0000000..d77926e
--- /dev/null
+++ b/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/RootFragmentIml.java
@@ -0,0 +1,23 @@
+package com.mrwang.stacklibrary.data;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.mrwang.stacklibrary.R;
+import com.mrwang.stacklibrary.RootFragment;
+
+/**
+ * Created by dell on 2016/7/19.
+ */
+public class RootFragmentIml extends RootFragment {
+    //for test
+    @Nullable
+    @Override
+    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        View inflate = inflater.inflate(R.layout.activity_main, null);
+        return inflate;
+    }
+}
diff --git a/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/TestActivity.java b/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/TestActivity.java
new file mode 100644
index 0000000..13d5cc3
--- /dev/null
+++ b/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/TestActivity.java
@@ -0,0 +1,33 @@
+package com.mrwang.stacklibrary.data;
+
+
+import android.os.Bundle;
+
+import com.mrwang.stacklibrary.RootActivity;
+import com.mrwang.stacklibrary.RootFragment;
+
+/**
+ * User: chengwangyong(chengwangyong@vcinema.com)
+ * Date: 2016-01-19
+ * Time: 09:48
+ */
+public class TestActivity extends RootActivity {
+
+    @Override
+    protected RootFragment getRootFragment() {
+        return new RootFragmentIml();
+    }
+
+    @Override
+    public void onCreateNow(Bundle savedInstanceState) {
+    }
+
+    /**
+     * Set the time to click to Prevent repeated clicks,default 500ms
+     *
+     * @param CLICK_SPACE Repeat click time(ms)
+     */
+    public void setClickSpace(long CLICK_SPACE) {
+        manager.setClickSpace(CLICK_SPACE);
+    }
+}
diff --git a/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/TestRootFragment.java b/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/TestRootFragment.java
new file mode 100644
index 0000000..ac4a019
--- /dev/null
+++ b/stacklibrary/src/test/java/com/mrwang/stacklibrary/data/TestRootFragment.java
@@ -0,0 +1,10 @@
+package com.mrwang.stacklibrary.data;
+
+import com.mrwang.stacklibrary.RootFragment;
+
+/**
+ * Created by dell on 2016/7/19.
+ */
+public class TestRootFragment extends RootFragment {
+    //just for test
+}
diff --git a/stacklibrary/src/test/java/com/mrwang/stacklibrary/test/FragmentStackTest.java b/stacklibrary/src/test/java/com/mrwang/stacklibrary/test/FragmentStackTest.java
new file mode 100644
index 0000000..96769f1
--- /dev/null
+++ b/stacklibrary/src/test/java/com/mrwang/stacklibrary/test/FragmentStackTest.java
@@ -0,0 +1,61 @@
+package com.mrwang.stacklibrary.test;
+
+import com.mrwang.stacklibrary.CustomBuildConfig;
+import com.mrwang.stacklibrary.FragmentStack;
+import com.mrwang.stacklibrary.data.RootFragmentIml;
+import com.mrwang.stacklibrary.data.TestRootFragment;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricGradleTestRunner;
+import org.robolectric.annotation.Config;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Created by dell on 2016/7/19.
+ */
+@RunWith(RobolectricGradleTestRunner.class)
+@Config(constants = CustomBuildConfig.class, sdk = 21, packageName = "com.mrwang.stacklibrary")
+public class FragmentStackTest {
+    FragmentStack stack;
+
+    @Before
+    public void setUp() {
+        stack = new FragmentStack();
+    }
+
+
+    @Test
+    public void putSingleTask() {
+        TestRootFragment rootFragment = new TestRootFragment();
+        assertEquals(stack.putSingleTask(rootFragment), false);
+        assertEquals(stack.putSingleTask(rootFragment), true);
+    }
+
+    @Test
+    public void putSingleTop() {
+        TestRootFragment rootFragment = new TestRootFragment();
+        assertEquals(stack.putSingleTop(rootFragment), false);
+        assertEquals(stack.putSingleTop(rootFragment), true);
+    }
+
+    @Test
+    public void putStandard() {
+        TestRootFragment rootFragment = new TestRootFragment();
+        stack.putStandard(rootFragment);
+        assertEquals(stack.putSingleTop(rootFragment), true);
+
+        RootFragmentIml iml = new RootFragmentIml();
+        assertEquals(stack.putSingleTop(iml), false);
+    }
+
+    @Test
+    public void putSingleInstance() {
+        TestRootFragment rootFragment = new TestRootFragment();
+        stack.putSingleInstance(rootFragment);
+        assertEquals(stack.putSingleTask(rootFragment), true);
+    }
+
+}
diff --git a/stacklibrary/src/test/java/com/mrwang/stacklibrary/test/StackManagerTest.java b/stacklibrary/src/test/java/com/mrwang/stacklibrary/test/StackManagerTest.java
new file mode 100644
index 0000000..58b3c02
--- /dev/null
+++ b/stacklibrary/src/test/java/com/mrwang/stacklibrary/test/StackManagerTest.java
@@ -0,0 +1,26 @@
+package com.mrwang.stacklibrary.test;
+
+import com.mrwang.stacklibrary.CustomBuildConfig;
+import com.mrwang.stacklibrary.data.TestActivity;
+
+import org.junit.Before;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RobolectricGradleTestRunner;
+import org.robolectric.annotation.Config;
+
+/**
+ * Created by dell on 2016/7/19.
+ */
+@RunWith(RobolectricGradleTestRunner.class)
+@Config(constants = CustomBuildConfig.class, sdk = 21, packageName = "com.mrwang.stacklibrary")
+public class StackManagerTest {
+
+    private TestActivity activity;
+    @Before
+    public void setUp(){
+        activity = Robolectric.buildActivity(TestActivity.class).create().get();
+    }
+
+
+}