Add ChipGroup unit test.

PiperOrigin-RevId: 225190750

Author: wcshi

lib/javatests/com/google/android/material/chip/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          xmlns:tools="http://schemas.android.com/tools"
+    package="com.google.android.material.chip">
+
+  <uses-sdk android:minSdkVersion="14"/>
+
+  <application/>
+</manifest>

lib/javatests/com/google/android/material/chip/ChipGroupTest.java

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+/*
+ * Copyright 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.google.android.material.chip;
+
+import com.google.android.material.R;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.internal.DoNotInstrument;
+
+/** Tests for {@link com.google.android.material.chip.ChipGroup}. */
+@RunWith(RobolectricTestRunner.class)
+@DoNotInstrument
+public class ChipGroupTest {
+
+  private static final int CHIP_GROUP_SPACING = 4;
+  private ChipGroup chipgroup;
+
+  @Before
+  public void themeApplicationContext() {
+    RuntimeEnvironment.application.setTheme(
+        R.style.Theme_MaterialComponents_Light_NoActionBar_Bridge);
+    AppCompatActivity activity = Robolectric.buildActivity(AppCompatActivity.class).setup().get();
+    View inflated = activity.getLayoutInflater().inflate(R.layout.test_reflow_chipgroup, null);
+    chipgroup = inflated.findViewById(R.id.chip_group);
+  }
+
+  @Test
+  public void testSetChipSpacing() {
+    chipgroup.setChipSpacing(CHIP_GROUP_SPACING);
+    assertEquals(chipgroup.getChipSpacingHorizontal(), chipgroup.getChipSpacingVertical());
+    assertEquals(CHIP_GROUP_SPACING, chipgroup.getChipSpacingHorizontal());
+  }
+
+  @Test
+  public void testSelection() {
+    chipgroup.setSingleSelection(true);
+    assertTrue(chipgroup.isSingleSelection());
+    assertEquals(View.NO_ID, chipgroup.getCheckedChipId());
+    int chipId = chipgroup.getChildAt(0).getId();
+    assertNotEquals(View.NO_ID, chipId);
+    chipgroup.check(chipId);
+    assertEquals(chipId, chipgroup.getCheckedChipId());
+    chipgroup.clearCheck();
+    assertEquals(View.NO_ID, chipgroup.getCheckedChipId());
+  }
+}

lib/javatests/com/google/android/material/chip/res/layout/test_reflow_chipgroup.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 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
+
+      https://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.
+  -->
+
+<!-- Reflow chip group. -->
+<com.google.android.material.chip.ChipGroup
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/chip_group"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="16dp">
+  <com.google.android.material.chip.Chip
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/filter_chip"
+    style="@style/Widget.MaterialComponents.Chip.Filter"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:ellipsize="end"
+    android:text="@string/chip_text"/>
+  </com.google.android.material.chip.ChipGroup>

lib/javatests/com/google/android/material/chip/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<resources>
+  <string name="chip_text">Chip text</string>
+</resources>