Replace existing Robolectric test task with functioning one.

This CL does the following:
- Creates a dir for multivalentTests
- Creates symlinks for the dir to keep Android Studio happy
- Moves many files to the multivalentTests dir
- Adjusts gradle and soong build files to use the new dir as part of
their source sets.

Test: ./gradlew :NexusLauncher:testGoogleWithQuickstepDebugUnitTest
Test: atest Launcher3RoboTests
Fix: 316553886
Bug: 316553889
Flag: NA
Change-Id: Iae28fd0c0191b3ecf9bd2950800875950cca2622

tests/multivalentTests/src/com/android/launcher3/util/PackageUserKeyTest.java

@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2021 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.android.launcher3.widget.WidgetSections.NO_CATEGORY;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.UserHandle;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import com.android.launcher3.model.data.PackageItemInfo;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public final class PackageUserKeyTest {
+    @Rule
+    public ExpectedException exception = ExpectedException.none();
+
+    private static final String TEST_PACKAGE = "com.android.test.package";
+    private static final int CONVERSATIONS = 0;
+    private static final int WEATHER = 1;
+
+    @Test
+    public void fromPackageItemInfo_shouldCreateExpectedObject() {
+        PackageUserKey packageUserKey = PackageUserKey.fromPackageItemInfo(
+                new PackageItemInfo(TEST_PACKAGE, UserHandle.CURRENT));
+
+        assertThat(packageUserKey.mPackageName).isEqualTo(TEST_PACKAGE);
+        assertThat(packageUserKey.mWidgetCategory).isEqualTo(NO_CATEGORY);
+        assertThat(packageUserKey.mUser).isEqualTo(UserHandle.CURRENT);
+    }
+
+    @Test
+    public void constructor_packageNameAndUserHandle_shouldCreateExpectedObject() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+
+        assertThat(packageUserKey.mPackageName).isEqualTo(TEST_PACKAGE);
+        assertThat(packageUserKey.mWidgetCategory).isEqualTo(NO_CATEGORY);
+        assertThat(packageUserKey.mUser).isEqualTo(UserHandle.CURRENT);
+    }
+
+    @Test
+    public void constructor_widgetCategoryAndUserHandle_shouldCreateExpectedObject() {
+        PackageUserKey packageUserKey = new PackageUserKey(CONVERSATIONS, UserHandle.CURRENT);
+
+        assertThat(packageUserKey.mPackageName).isEqualTo("");
+        assertThat(packageUserKey.mWidgetCategory).isEqualTo(CONVERSATIONS);
+        assertThat(packageUserKey.mUser).isEqualTo(UserHandle.CURRENT);
+    }
+
+    @Test
+    public void equals_sameObject_shouldReturnTrue() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = packageUserKey;
+
+        assertThat(packageUserKey).isEqualTo(otherPackageUserKey);
+    }
+
+    @Test
+    public void equals_differentObjectSameContent_shouldReturnTrue() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+
+        assertThat(packageUserKey).isEqualTo(otherPackageUserKey);
+    }
+
+    @Test
+    public void equals_compareAgainstNull_shouldReturnFalse() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+
+        assertThat(packageUserKey).isNotEqualTo(null);
+    }
+
+    @Test
+    public void equals_differentPackage_shouldReturnFalse() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = new PackageUserKey(TEST_PACKAGE + "1",
+                UserHandle.CURRENT);
+
+        assertThat(packageUserKey).isNotEqualTo(otherPackageUserKey);
+    }
+
+
+    @Test
+    public void equals_differentCategory_shouldReturnFalse() {
+        PackageUserKey packageUserKey = new PackageUserKey(WEATHER, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = new PackageUserKey(CONVERSATIONS, UserHandle.CURRENT);
+
+        assertThat(packageUserKey).isNotEqualTo(otherPackageUserKey);
+    }
+
+    @Test
+    public void equals_differentUser_shouldReturnFalse() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.of(1));
+        PackageUserKey otherPackageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.of(2));
+
+        assertThat(packageUserKey).isNotEqualTo(otherPackageUserKey);
+    }
+
+    @Test
+    public void hashCode_sameObject_shouldBeTheSame() {
+        PackageUserKey packageUserKey = new PackageUserKey(WEATHER, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = packageUserKey;
+
+        assertThat(packageUserKey.hashCode()).isEqualTo(otherPackageUserKey.hashCode());
+    }
+
+    @Test
+    public void hashCode_differentObjectSameContent_shouldBeTheSame() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+
+        assertThat(packageUserKey.hashCode()).isEqualTo(otherPackageUserKey.hashCode());
+    }
+
+    @Test
+    public void hashCode_differentPackage_shouldBeDifferent() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = new PackageUserKey(TEST_PACKAGE + "1",
+                UserHandle.CURRENT);
+
+        assertThat(packageUserKey.hashCode()).isNotEqualTo(otherPackageUserKey.hashCode());
+    }
+
+
+    @Test
+    public void hashCode_differentCategory_shouldBeDifferent() {
+        PackageUserKey packageUserKey = new PackageUserKey(WEATHER, UserHandle.CURRENT);
+        PackageUserKey otherPackageUserKey = new PackageUserKey(CONVERSATIONS, UserHandle.CURRENT);
+
+        assertThat(packageUserKey.hashCode()).isNotEqualTo(otherPackageUserKey.hashCode());
+    }
+
+    @Test
+    public void hashCode_differentUser_shouldBeDifferent() {
+        PackageUserKey packageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.of(1));
+        PackageUserKey otherPackageUserKey = new PackageUserKey(TEST_PACKAGE, UserHandle.of(2));
+
+        assertThat(packageUserKey.hashCode()).isNotEqualTo(otherPackageUserKey.hashCode());
+    }
+}