test(unit): add Thumbnail and Remux service tests

src/test/java/com/ddf/vodsystem/services/media/RemuxServiceTest.java

@@ -0,0 +1,48 @@
+package com.ddf.vodsystem.services.media;
+
+import com.ddf.vodsystem.dto.ProgressTracker;
+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.io.File;
+import java.util.List;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(MockitoExtension.class)
+class RemuxServiceTest {
+
+    @Mock
+    private CommandRunner commandRunner;
+
+    private RemuxService remuxService;
+
+    @BeforeEach
+    void setUp() {
+        remuxService = new RemuxService(commandRunner);
+    }
+
+    @Test
+    void remux_buildsExpectedFfmpegCommand() throws Exception {
+        File input = new File("videos/input.ts");
+        File output = new File("videos/output.mp4");
+
+        remuxService.remux(input, output, new ProgressTracker(), 60f);
+
+        verify(commandRunner).run(eq(List.of(
+                "ffmpeg",
+                "-progress", "pipe:1",
+                "-y",
+                "-i", input.getAbsolutePath(),
+                "-c:v", "h264",
+                "-c:a", "aac",
+                "-f", "mp4",
+                output.getAbsolutePath()
+        )), any());
+    }
+}

src/test/java/com/ddf/vodsystem/services/media/ThumbnailServiceTest.java

@@ -0,0 +1,42 @@
+package com.ddf.vodsystem.services.media;
+
+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.nio.file.Path;
+import java.util.List;
+
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(MockitoExtension.class)
+class ThumbnailServiceTest {
+
+    @Mock
+    private CommandRunner commandRunner;
+
+    private ThumbnailService thumbnailService;
+
+    @BeforeEach
+    void setUp() {
+        thumbnailService = new ThumbnailService(commandRunner);
+    }
+
+    @Test
+    void createThumbnail_buildsExpectedFfmpegCommand() throws Exception {
+        Path input = Path.of("videos/input.mp4");
+        Path output = Path.of("thumbnails/output.jpg");
+
+        thumbnailService.createThumbnail(input, output, 12.5f);
+
+        verify(commandRunner).run(List.of(
+                "ffmpeg",
+                "-ss", "12.5",
+                "-i", input.toAbsolutePath().toString(),
+                "-frames:v", "1",
+                output.toAbsolutePath().toString()
+        ));
+    }
+}