Add tests for validation and extract command from Main

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/impl/validation/ValidationExecutionStrategyTest.java

@@ -0,0 +1,61 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.validation;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.CommandRunner;
+import org.junit.jupiter.api.Test;
+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.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.stream.Stream;
+
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.PathUtils.*;
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.TestUtil.args;
+import static org.junit.jupiter.api.Assertions.*;
+
+class ValidationExecutionStrategyTest {
+
+    @Test
+    void validate() {
+        CommandRunner underTest = new CommandRunner();
+        new CommandLine(underTest)
+                .setExecutionStrategy(new ValidationExecutionStrategy())
+                .parseArgs("-a", "ger:ger", "-l", TEST_FILE, "-m", TEST_MKVTOOLNIX_DIR);
+
+        assertEquals(TEST_FILE, underTest.getConfig().getLibraryPath().getPath());
+        assertEquals(TEST_MKVTOOLNIX_DIR, underTest.getConfig().getMkvToolNix().getPath());
+    }
+
+    private static Stream<Arguments> validateFailure() {
+        return Stream.of(
+                Arguments.of(new String[]{"-a", "jpn:ger"}, "Error: Missing required argument(s): --library=<libraryPath>"),
+                Arguments.of(new String[]{"-a", "jpn:ger", "-l"}, "Missing required parameter for option '--library' (<libraryPath>)"),
+                Arguments.of(new String[]{"-l", "/arstarstarst"}, "Error: Missing required argument(s): --attribute-config=<attributeConfig>"),
+                Arguments.of(new String[]{"-l", "/arstarstarst", "-a",}, "Missing required parameter for option '--attribute-config' at index 0 (<attributeConfig>)"),
+                Arguments.of(new String[]{"-l", "/arstarstarst", "-a", "jpn:ger"}, "libraryPath does not exist"),
+                Arguments.of(args("-m"), "Missing required parameter for option '--mkvtoolnix' (<mkvToolNix>)"),
+                Arguments.of(args("-m", TEST_INVALID_DIR), "mkvToolNix does not exist"),
+                Arguments.of(args("-t"), "Missing required parameter for option '--threads' (<threads>)"),
+                Arguments.of(args("-t", "0"), "threads must be greater than or equal to 1"),
+                Arguments.of(args("-t", "-1"), "threads must be greater than or equal to 1"),
+                Arguments.of(args("-c", "-1"), "coherent must be greater than or equal to 0")
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("validateFailure")
+    void validateFailure(String[] args, String expectedMessage) {
+        StringWriter writer = new StringWriter();
+        PrintWriter printWriter = new PrintWriter(writer);
+
+        new CommandLine(CommandRunner.class)
+                .setExecutionStrategy(new ValidationExecutionStrategy())
+                .setErr(printWriter)
+                .execute(args);
+
+        printWriter.flush();
+        assertEquals(expectedMessage, writer.toString().split("\n")[0]);
+    }
+}