[Test Week] Add ViewCacheTest
Number of new tested methods: 3
Bug: 353303621
Test: This is the unit test
Flag: NONE - unit test
Change-Id: I235ba375db12b9f3fac6f204018b32e692835eab
diff --git a/src/com/android/launcher3/util/ViewCache.java b/src/com/android/launcher3/util/ViewCache.java
index 98e6822..b98e977 100644
--- a/src/com/android/launcher3/util/ViewCache.java
+++ b/src/com/android/launcher3/util/ViewCache.java
@@ -21,6 +21,8 @@
import android.view.View;
import android.view.ViewGroup;
+import androidx.annotation.VisibleForTesting;
+
import com.android.launcher3.R;
/**
@@ -67,7 +69,8 @@
}
}
- private static class CacheEntry {
+ @VisibleForTesting
+ static class CacheEntry {
final int mMaxSize;
final View[] mViews;
diff --git a/tests/src/com/android/launcher3/util/ViewCacheTest.kt b/tests/src/com/android/launcher3/util/ViewCacheTest.kt
new file mode 100644
index 0000000..bad21c9
--- /dev/null
+++ b/tests/src/com/android/launcher3/util/ViewCacheTest.kt
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2024 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 android.view.View
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import com.android.launcher3.R
+import com.android.launcher3.util.ViewCache.CacheEntry
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class ViewCacheTest {
+
+ private lateinit var underTest: ViewCache
+
+ private val context = InstrumentationRegistry.getInstrumentation().context
+ private val layoutId =
+ context.run { resources.getIdentifier("test_layout_appwidget_blue", "layout", packageName) }
+
+ @Before
+ fun setUp() {
+ underTest = ViewCache()
+ underTest.setCacheSize(layoutId, 5)
+ }
+
+ @Test
+ fun get_view_from_empty_cache() {
+ val view: View = underTest.getView(layoutId, context, null)
+
+ val cacheEntry = view.getTag(R.id.cache_entry_tag_id) as ViewCache.CacheEntry
+ assertThat(cacheEntry).isNotNull()
+ assertThat(cacheEntry.mMaxSize).isEqualTo(5)
+ assertThat(cacheEntry.mCurrentSize).isEqualTo(0)
+ assertThat(cacheEntry.mViews[0]).isNull()
+ }
+
+ @Test
+ fun recyclerView() {
+ val view: View = underTest.getView(layoutId, context, null)
+ val cacheEntry = view.getTag(R.id.cache_entry_tag_id) as ViewCache.CacheEntry
+
+ underTest.recycleView(layoutId, view)
+
+ assertThat(cacheEntry.mMaxSize).isEqualTo(5)
+ assertThat(cacheEntry.mCurrentSize).isEqualTo(1)
+ assertThat(cacheEntry.mViews[0]).isSameInstanceAs(view)
+ }
+
+ @Test
+ fun get_view_from_cache() {
+ val view: View = underTest.getView(layoutId, context, null)
+ underTest.recycleView(layoutId, view)
+
+ val newView = underTest.getView<View>(layoutId, context, null)
+
+ assertThat(view).isSameInstanceAs(newView)
+ }
+
+ @Test
+ fun change_tag_id_recyclerView_noOp() {
+ val view: View = underTest.getView(layoutId, context, null)
+ val cacheEntry = view.getTag(R.id.cache_entry_tag_id) as ViewCache.CacheEntry
+
+ view.setTag(R.id.cache_entry_tag_id, CacheEntry(3))
+ underTest.recycleView(layoutId, view)
+
+ assertThat(cacheEntry.mMaxSize).isEqualTo(5)
+ assertThat(cacheEntry.mCurrentSize).isEqualTo(0)
+ assertThat(cacheEntry.mViews[0]).isNull()
+ }
+}