1 files changed, 66 insertions, 0 deletions
diff --git a/adservices/tests/unittest/service-core/src/com/android/adservices/data/topics/migration/AbstractTopicsDbMigratorTest.java b/adservices/tests/unittest/service-core/src/com/android/adservices/data/topics/migration/AbstractTopicsDbMigratorTest.java
new file mode 100644
index 0000000000..0f4317024c
--- /dev/null
+++ b/adservices/tests/unittest/service-core/src/com/android/adservices/data/topics/migration/AbstractTopicsDbMigratorTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 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.adservices.data.topics.migration;
+
+import static org.junit.Assert.assertThrows;
+
+import android.database.sqlite.SQLiteDatabase;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/** Unit tests for {@link com.android.adservices.data.topics.migration.AbstractTopicsDbMigrator} */
+public class AbstractTopicsDbMigratorTest {
+    @Mock private SQLiteDatabase mDb;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @Test
+    public void testPerformMigration_onUpgrade() {
+        // Test targetVersion is newer than newVersion on upgrading
+        assertThrows(
+                IllegalArgumentException.class,
+                () ->
+                        initMigrator(/* targetVersion */ 3)
+                                .performMigration(mDb, /* oldVersion */ 1, /* newVersion */ 2));
+
+        // Test targetVersion is not newer than oldVersion on upgrading
+        assertThrows(
+                IllegalArgumentException.class,
+                () ->
+                        initMigrator(/* targetVersion */ 1)
+                                .performMigration(mDb, /* oldVersion */ 1, /* newVersion */ 2));
+
+        // Test to perform on Upgrading
+        initMigrator(/* targetVersion */ 2)
+                .performMigration(mDb, /* oldVersion */ 1, /* newVersion */ 2);
+    }
+
+    // Initialize the abstractTopicsDbMigrator with a target version. Use isPerformed to indicate
+    // when performMigration is invoked.
+    private AbstractTopicsDbMigrator initMigrator(int targetVersion) {
+        return new AbstractTopicsDbMigrator(targetVersion) {
+            @Override
+            public void performMigration(SQLiteDatabase db) {}
+        };
+    }
+}