Add test cases on DataSourceNodePersistService (apache#32988)

kernel/metadata/core/src/test/java/org/apache/shardingsphere/metadata/persist/service/config/database/DataSourceNodePersistServiceTest.java

@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.shardingsphere.metadata.persist.service.config.database;
+
+import org.apache.shardingsphere.infra.datasource.pool.props.domain.DataSourcePoolProperties;
+import org.apache.shardingsphere.mode.spi.PersistRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class DataSourceNodePersistServiceTest {
+
+    private DataSourceNodePersistService dataSourceNodePersistService;
+
+    @Mock
+    private PersistRepository repository;
+
+    @BeforeEach
+    void setUp() {
+        dataSourceNodePersistService = new DataSourceNodePersistService(repository);
+    }
+
+    @Test
+    void assertLoad() {
+        when(repository.getChildrenKeys("/metadata/foo_db/data_sources/nodes")).thenReturn(Arrays.asList("foo_ds", "bar_ds"));
+        when(repository.query("/metadata/foo_db/data_sources/nodes/foo_ds/active_version")).thenReturn("10");
+        when(repository.query("/metadata/foo_db/data_sources/nodes/foo_ds/versions/10")).thenReturn("{dataSourceClassName: org.apache.shardingsphere.test.fixture.jdbc.MockedDataSource}");
+        Map<String, DataSourcePoolProperties> actual = dataSourceNodePersistService.load("foo_db");
+        assertThat(actual.size(), is(1));
+        assertThat(actual.get("foo_ds").getPoolClassName(), is("org.apache.shardingsphere.test.fixture.jdbc.MockedDataSource"));
+    }
+
+    @Test
+    void assertLoadWithVersions() {
+        when(repository.query("/metadata/foo_db/data_sources/nodes/foo_ds/active_version")).thenReturn("10");
+        when(repository.query("/metadata/foo_db/data_sources/nodes/foo_ds/versions/10")).thenReturn("{dataSourceClassName: org.apache.shardingsphere.test.fixture.jdbc.MockedDataSource}");
+        Map<String, DataSourcePoolProperties> actual = dataSourceNodePersistService.load("foo_db", "foo_ds");
+        assertThat(actual.size(), is(1));
+        assertThat(actual.get("foo_ds").getPoolClassName(), is("org.apache.shardingsphere.test.fixture.jdbc.MockedDataSource"));
+    }
+
+    @Test
+    void assertLoadWithoutVersions() {
+        when(repository.query("/metadata/foo_db/data_sources/nodes/foo_ds/active_version")).thenReturn("");
+        when(repository.query("/metadata/foo_db/data_sources/nodes/foo_ds/versions/")).thenReturn("");
+        Map<String, DataSourcePoolProperties> actual = dataSourceNodePersistService.load("foo_db", "foo_ds");
+        assertTrue(actual.isEmpty());
+    }
+
+    @Test
+    void assertPersist() {
+        Map<String, DataSourcePoolProperties> dataSourceConfigs = new LinkedHashMap<>(2, 1F);
+        dataSourceConfigs.put("foo_ds", new DataSourcePoolProperties("org.apache.shardingsphere.test.fixture.jdbc.MockedDataSource", Collections.emptyMap()));
+        dataSourceConfigs.put("bar_ds", new DataSourcePoolProperties("org.apache.shardingsphere.test.fixture.jdbc.MockedDataSource", Collections.emptyMap()));
+        when(repository.query("/metadata/foo_db/data_sources/nodes/foo_ds/active_version")).thenReturn("10");
+        when(repository.getChildrenKeys("/metadata/foo_db/data_sources/nodes/foo_ds/versions")).thenReturn(Collections.singletonList("10"));
+        dataSourceNodePersistService.persist("foo_db", dataSourceConfigs);
+        verify(repository).persist(eq("/metadata/foo_db/data_sources/nodes/foo_ds/versions/11"), any());
+        verify(repository).persist(eq("/metadata/foo_db/data_sources/nodes/bar_ds/versions/0"), any());
+    }
+
+    @Test
+    void assertDelete() {
+        dataSourceNodePersistService.delete("foo_db", "foo_ds");
+        verify(repository).delete("/metadata/foo_db/data_sources/nodes/foo_ds");
+    }
+}