Add attribute conversion tests

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/AttributeConfigConverter.java

@@ -19,7 +19,7 @@ public class AttributeConfigConverter implements CommandLine.ITypeConverter<Attr
      * @throws CommandLine.TypeConversionException if the input string is invalid or contains invalid language codes
      */
     @Override
-    public AttributeConfig convert(String s) throws Exception {
+    public AttributeConfig convert(String s) {
         validateInput(s);
 
         String[] split = s.split(SEPARATOR);

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/AttributeConfigConverterTest.java

@@ -0,0 +1,49 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.AttributeConfig;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+import picocli.CommandLine;
+
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AttributeConfigConverterTest {
+
+    private static Stream<Arguments> validData() {
+        return Stream.of(
+                Arguments.of("jpn:ger", new AttributeConfig("jpn", "ger")),
+                Arguments.of("eng:eng", new AttributeConfig("eng", "eng")),
+                Arguments.of("OFF:OFF", new AttributeConfig("OFF", "OFF"))
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("validData")
+    void convert(String input, AttributeConfig expected) {
+        AttributeConfigConverter underTest = new AttributeConfigConverter();
+        AttributeConfig actual = underTest.convert(input);
+        assertEquals(expected, actual);
+    }
+
+    private static Stream<Arguments> invalidData() {
+        return Stream.of(
+                Arguments.of("ars:eng"),
+                Arguments.of("ars:OFF"),
+                Arguments.of("OFF:ars"),
+                Arguments.of("ars:ars"),
+                Arguments.of("arss:ars"),
+                Arguments.of("ars:arsr")
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("invalidData")
+    void convertInvalid(String input) {
+        AttributeConfigConverter underTest = new AttributeConfigConverter();
+        assertThrows(CommandLine.TypeConversionException.class, () -> underTest.convert(input));
+    }
+}
+