feat:Add coverage for nacos parser

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/parser/NacosDataParserHandlerTest.java

@@ -0,0 +1,133 @@
+/*
+ * Copyright 2013-2023 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
+ *
+ *      https://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.alibaba.cloud.nacos.parser;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockedStatic;
+import org.springframework.boot.env.PropertySourceLoader;
+import org.springframework.core.env.PropertySource;
+import org.springframework.core.io.support.SpringFactoriesLoader;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.mockStatic;
+import static org.mockito.Mockito.when;
+
+/**
+ * NacosDataParserHandlerTest.
+ *
+ * @author songyanhui
+ */
+public class NacosDataParserHandlerTest {
+
+    private NacosDataParserHandler nacosDataParserHandler;
+
+    @BeforeEach
+    void setUp() {
+        nacosDataParserHandler = NacosDataParserHandler.getInstance();
+    }
+
+    @Test
+    void parseNacosData_EmptyConfigValue_ReturnsEmptyList() throws IOException {
+        String configName = "test";
+        String configValue = "";
+        String extension = "properties";
+
+        List<PropertySource<?>> propertySources = nacosDataParserHandler.parseNacosData(configName, configValue, extension);
+
+        assertTrue(propertySources.isEmpty());
+    }
+
+    @Test
+    void parseNacosData_ValidPropertiesExtension_ReturnsPropertySource() throws IOException {
+        String configName = "test";
+        String configValue = "key=value";
+        String extension = "properties";
+
+        PropertySourceLoader mockLoader = mock(PropertySourceLoader.class);
+        when(mockLoader.load(anyString(), any())).thenReturn(Collections.singletonList(mock(PropertySource.class)));
+
+        // Mock the SpringFactoriesLoader to return our mocked loader
+        try (MockedStatic<SpringFactoriesLoader> mocked = mockStatic(SpringFactoriesLoader.class)) {
+            mocked.when(() -> SpringFactoriesLoader.loadFactories(PropertySourceLoader.class, getClass().getClassLoader()))
+                    .thenReturn(Collections.singletonList(mockLoader));
+
+            List<PropertySource<?>> propertySources = nacosDataParserHandler.parseNacosData(configName, configValue, extension);
+
+            assertFalse(propertySources.isEmpty());
+        }
+    }
+
+    @Test
+    void parseNacosData_ValidYamlExtension_ReturnsPropertySource() throws IOException {
+        String configName = "test";
+        String configValue = "key: value";
+        String extension = "yaml";
+
+        PropertySourceLoader mockLoader = mock(PropertySourceLoader.class);
+        when(mockLoader.load(anyString(), any())).thenReturn(Collections.singletonList(mock(PropertySource.class)));
+
+        // Mock the SpringFactoriesLoader to return our mocked loader
+        try (MockedStatic<SpringFactoriesLoader> mocked = mockStatic(SpringFactoriesLoader.class)) {
+            mocked.when(() -> SpringFactoriesLoader.loadFactories(PropertySourceLoader.class, getClass().getClassLoader()))
+                    .thenReturn(Collections.singletonList(mockLoader));
+
+            List<PropertySource<?>> propertySources = nacosDataParserHandler.parseNacosData(configName, configValue, extension);
+
+            assertFalse(propertySources.isEmpty());
+        }
+    }
+
+    @Test
+    void parseNacosData_EmptyExtension_DetectsFromConfigName() throws IOException {
+        String configName = "test.properties";
+        String configValue = "key=value";
+        String extension = "";
+
+        PropertySourceLoader mockLoader = mock(PropertySourceLoader.class);
+        when(mockLoader.load(anyString(), any())).thenReturn(Collections.singletonList(mock(PropertySource.class)));
+
+        // Mock the SpringFactoriesLoader to return our mocked loader
+        try (MockedStatic<SpringFactoriesLoader> mocked = mockStatic(SpringFactoriesLoader.class)) {
+            mocked.when(() -> SpringFactoriesLoader.loadFactories(PropertySourceLoader.class, getClass().getClassLoader()))
+                    .thenReturn(Collections.singletonList(mockLoader));
+
+            List<PropertySource<?>> propertySources = nacosDataParserHandler.parseNacosData(configName, configValue, extension);
+
+            assertFalse(propertySources.isEmpty());
+        }
+    }
+
+    @Test
+    void parseNacosData_InvalidExtension_NoMatchingLoader() throws IOException {
+        String configName = "test";
+        String configValue = "key=value";
+        String extension = "invalid";
+
+        List<PropertySource<?>> propertySources = nacosDataParserHandler.parseNacosData(configName, configValue, extension);
+
+        assertTrue(propertySources.isEmpty());
+    }
+}