Convenience constructors for CompositeDatabasePopulator

Issue: SPR-14313

spring-jdbc/src/test/java/org/springframework/jdbc/datasource/init/CompositeDatabasePopulatorTests.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright 2002-2016 the original author or authors.
+ *
+ * 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 org.springframework.jdbc.datasource.init;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import org.junit.Test;
+
+import static org.mockito.Mockito.*;
+
+/**
+ * Unit tests for {@link CompositeDatabasePopulator}.
+ *
+ * @author Kazuki Shimizu
+ * @author Juergen Hoeller
+ * @since 4.3
+ */
+public class CompositeDatabasePopulatorTests {
+
+	private final Connection mockedConnection = mock(Connection.class);
+
+	private final DatabasePopulator mockedDatabasePopulator1 = mock(DatabasePopulator.class);
+
+	private final DatabasePopulator mockedDatabasePopulator2 = mock(DatabasePopulator.class);
+
+
+	@Test
+	public void addPopulators() throws SQLException {
+		CompositeDatabasePopulator populator = new CompositeDatabasePopulator();
+		populator.addPopulators(mockedDatabasePopulator1, mockedDatabasePopulator2);
+		populator.populate(mockedConnection);
+		verify(mockedDatabasePopulator1,times(1)).populate(mockedConnection);
+		verify(mockedDatabasePopulator2, times(1)).populate(mockedConnection);
+	}
+
+	@Test
+	public void setPopulatorsWithMultiple() throws SQLException {
+		CompositeDatabasePopulator populator = new CompositeDatabasePopulator();
+		populator.setPopulators(mockedDatabasePopulator1, mockedDatabasePopulator2);  // multiple
+		populator.populate(mockedConnection);
+		verify(mockedDatabasePopulator1, times(1)).populate(mockedConnection);
+		verify(mockedDatabasePopulator2, times(1)).populate(mockedConnection);
+	}
+
+	@Test
+	public void setPopulatorsForOverride() throws SQLException {
+		CompositeDatabasePopulator populator = new CompositeDatabasePopulator();
+		populator.setPopulators(mockedDatabasePopulator1);
+		populator.setPopulators(mockedDatabasePopulator2);  // override
+		populator.populate(mockedConnection);
+		verify(mockedDatabasePopulator1, times(0)).populate(mockedConnection);
+		verify(mockedDatabasePopulator2, times(1)).populate(mockedConnection);
+	}
+
+	@Test
+	public void constructWithVarargs() throws SQLException {
+		CompositeDatabasePopulator populator =
+				new CompositeDatabasePopulator(mockedDatabasePopulator1, mockedDatabasePopulator2);
+		populator.populate(mockedConnection);
+		verify(mockedDatabasePopulator1, times(1)).populate(mockedConnection);
+		verify(mockedDatabasePopulator2, times(1)).populate(mockedConnection);
+	}
+
+	@Test
+	public void constructWithCollection() throws SQLException {
+		Set<DatabasePopulator> populators = new LinkedHashSet<>();
+		populators.add(mockedDatabasePopulator1);
+		populators.add(mockedDatabasePopulator2);
+		CompositeDatabasePopulator populator = new CompositeDatabasePopulator(populators);
+		populator.populate(mockedConnection);
+		verify(mockedDatabasePopulator1, times(1)).populate(mockedConnection);
+		verify(mockedDatabasePopulator2, times(1)).populate(mockedConnection);
+	}
+
+}