Code coverage - For issue fix #3669 (#4139)

* Issue Fix- 3669 Live Subtitles folder shows up in Recently Added-Played lists on web player

* Build error fix for issue-3669

* Code coverage - For issue fix 3669

Code coverage - For issue fix 3669

* Update PlayerApiServletTest.java

pom.xml

@@ -683,6 +683,19 @@
 			<version>4.0.4</version>
 			<type>jar</type>
 		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<version>5.6.0</version>
+			<scope>test</scope>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.mockito/mockito-junit-jupiter -->
+		<dependency>
+		    <groupId>org.mockito</groupId>
+		    <artifactId>mockito-junit-jupiter</artifactId>
+		    <version>5.6.0</version>
+		    <scope>test</scope>
+		</dependency>
 	</dependencies>
 	<build>
 		<defaultGoal>assembly:assembly</defaultGoal>

src/test/java/net/pms/network/webguiserver/servlets/PlayerApiServletTest.java

@@ -0,0 +1,104 @@
+package net.pms.network.webguiserver.servlets;
+
+import java.lang.reflect.Constructor;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+import java.lang.reflect.Field;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.gson.JsonArray;
+
+import net.pms.PMS;
+import net.pms.configuration.UmsConfiguration;
+import net.pms.dlna.DLNAResource;
+import net.pms.dlna.RootFolder;
+import net.pms.renderers.Renderer;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class PlayerApiServletTest {
+	private static final Logger LOGGER = LoggerFactory.getLogger(PlayerApiServletTest.class.getName());
+
+	@Mock
+	DLNAResource videoFolder;
+
+	@Mock
+	Renderer renderer;
+
+	@Mock
+	RootFolder rootFolder;
+
+	@Mock
+	PMS pms;
+
+	@Mock
+	UmsConfiguration config;
+
+	@BeforeEach
+	public void SetUp() {
+		videoFolder = Mockito.mock(DLNAResource.class);
+		renderer = Mockito.mock(Renderer.class);
+		pms = Mockito.mock(PMS.class);
+		config = Mockito.mock(UmsConfiguration.class);
+		Mockito.when(pms.getConfiguration(renderer)).thenReturn(config);
+		try {
+			Field privateField = PMS.class.getDeclaredField("umsConfiguration");
+			privateField.setAccessible(true);
+			privateField.set(pms, config);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+
+	@Test
+	public void testGetMediaLibraryFolderChildsForVideoFolderChildrenEmpty() throws Exception {
+		Constructor<PlayerApiServlet> constructor = PlayerApiServlet.class.getDeclaredConstructor();
+		constructor.setAccessible(true);
+		PlayerApiServlet playerApiServletInstance = constructor.newInstance();
+		Method method = PlayerApiServlet.class.getDeclaredMethod("getMediaLibraryFolderChilds", DLNAResource.class,
+				Renderer.class, String.class);
+		method.setAccessible(true);
+		try {
+			Mockito.when(videoFolder.getId()).thenReturn("100");
+			JsonArray jLibraryVideos = (JsonArray) method.invoke(playerApiServletInstance, videoFolder, renderer,
+					"100");
+			assertEquals(null, jLibraryVideos);
+		} catch (Exception ex) {
+			LOGGER.error("Exception occured : ", ex.getMessage());
+		}
+	}
+
+	@Test
+	public void testGetMediaLibraryFolderChildsForVideoFolderChildrenNotEmpty() throws Exception {
+		Constructor<PlayerApiServlet> playerApiServletConstructor = PlayerApiServlet.class.getDeclaredConstructor();
+		playerApiServletConstructor.setAccessible(true);
+		PlayerApiServlet playerApiServletInstance = playerApiServletConstructor.newInstance();
+		DLNAResource abstractClass = Mockito.mock(DLNAResource.class, Mockito.CALLS_REAL_METHODS);
+		Field stringValueField = DLNAResource.class.getDeclaredField("id");
+		stringValueField.setAccessible(true);
+		stringValueField.set(abstractClass, "100");
+		List<DLNAResource> libraryVideos = new ArrayList<>();
+		libraryVideos.add(abstractClass);
+		try {
+			Method method = PlayerApiServlet.class.getDeclaredMethod("getMediaLibraryFolderChilds", DLNAResource.class,
+					Renderer.class, String.class);
+			method.setAccessible(true);
+			Mockito.when(abstractClass.getDLNAResources(abstractClass.getId(), true, 0, 0, renderer, "100"))
+					.thenReturn(libraryVideos);
+			JsonArray jLibraryVideos = (JsonArray) method.invoke(playerApiServletInstance, abstractClass, renderer,
+					"100");
+			assertEquals(null, jLibraryVideos);
+		} catch (Exception ex) {
+			LOGGER.error("Exception occured : " + ex);
+		}
+	}
+
+}