1 files changed, 58 insertions, 0 deletions
diff --git a/tests/src/com/android/launcher3/util/IntSetTest.java b/tests/src/com/android/launcher3/util/IntSetTest.java
new file mode 100644
index 000000000..934b749f5
--- /dev/null
+++ b/tests/src/com/android/launcher3/util/IntSetTest.java
@@ -0,0 +1,58 @@
+/*
+ * 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 org.junit.Test;
+import org.junit.runner.RunWith;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Unit tests for {@link IntSet}
+ */
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class IntSetTest {
+
+    @Test
+    public void testDuplicateEntries() {
+        IntSet set = new IntSet();
+
+        set.add(2);
+        assertEquals(1, set.size());
+
+        set.add(2);
+        assertEquals(1, set.size());
+        assertTrue(set.contains(2));
+        assertFalse(set.contains(1));
+
+        set.add(1);
+        assertEquals(2, set.size());
+        assertTrue(set.contains(2));
+        assertTrue(set.contains(1));
+
+
+        set.add(10);
+        assertEquals(3, set.size());
+
+        assertEquals("1, 2, 10", set.mArray.toConcatString());
+    }
+}