Add robolectric tests for launcher

# Copyright (C) 2018 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.

#############################################

# Launcher Robolectric test target.         #

#############################################

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := LauncherRoboTests

LOCAL_SDK_VERSION := current

LOCAL_SRC_FILES := $(call all-java-files-under, src)

LOCAL_STATIC_JAVA_LIBRARIES := \

    androidx.test.runner \

    androidx.test.rules \

    mockito-robolectric-prebuilt \

    truth-prebuilt

LOCAL_JAVA_LIBRARIES := \

    platform-robolectric-3.6.1-prebuilt

LOCAL_INSTRUMENTATION_FOR := Launcher3

LOCAL_MODULE_TAGS := optional

include $(BUILD_STATIC_JAVA_LIBRARY)

############################################

# Target to run the previous target.       #

############################################

include $(CLEAR_VARS)

LOCAL_MODULE := RunLauncherRoboTests

LOCAL_SDK_VERSION := current

LOCAL_JAVA_LIBRARIES := \

    LauncherRoboTests

LOCAL_TEST_PACKAGE := Launcher3

LOCAL_INSTRUMENT_SOURCE_DIRS := $(dir $(LOCAL_PATH))../src \

LOCAL_ROBOTEST_TIMEOUT := 36000

include prebuilts/misc/common/robolectric/3.6.1/run_robotests.mk

/*

 * Copyright (C) 2018 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 com.android.launcher3.util;

import static com.google.common.truth.Truth.assertThat;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.robolectric.RobolectricTestRunner;

import org.robolectric.annotation.Config;

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertFalse;

import static org.junit.Assert.assertTrue;

/**

 * Robolectric unit tests for {@link IntSet}

 */

@RunWith(RobolectricTestRunner.class)

@Config(sdk = 26)

public class IntSetTest {

    @Test

    public void shouldBeEmptyInitially() {

        IntSet set = new IntSet();

        assertThat(set.size()).isEqualTo(0);

    }

    @Test

    public void oneElementSet() {

        IntSet set = new IntSet();

        set.add(2);

        assertThat(set.size()).isEqualTo(1);

        assertTrue(set.contains(2));

        assertFalse(set.contains(1));

    }

    @Test

    public void twoElementSet() {

        IntSet set = new IntSet();

        set.add(2);

        set.add(1);

        assertThat(set.size()).isEqualTo(2);

        assertTrue(set.contains(2));

        assertTrue(set.contains(1));

    }

    @Test

    public void threeElementSet() {

        IntSet set = new IntSet();

        set.add(2);

        set.add(1);

        set.add(10);

        assertThat(set.size()).isEqualTo(3);

        assertEquals("1, 2, 10", set.mArray.toConcatString());

    }

    @Test

    public void duplicateEntries() {

        IntSet set = new IntSet();

        set.add(2);

        set.add(2);

        assertEquals(1, set.size());

    }

}