Add unit test for validateArguments method

src/test/java/corgi/parsers/CommandValidatorTest.java

@@ -0,0 +1,62 @@
+package corgi.parsers;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.junit.jupiter.api.Test;
+
+public class CommandValidatorTest {
+
+    @Test
+    public void validateArguments_invalidNumberOfArguments_throwsInvalidCommandFormatException() {
+        CommandValidator validator = new CommandValidator();
+
+        String command1 = "command /arg1 text1 /arg1 text2 /arg2 text3 /arg3 text4";
+        String command2 = "command /arg1 text1 /arg2 text2 /arg2 text3 /arg3 text4";
+        String command3 = "command /arg1 text1 /arg3 text2 /arg2 text3 /arg3 text4";
+
+        Set<String> arguments = new HashSet<>();
+        arguments.add("/arg1");
+        arguments.add("/arg2");
+        arguments.add("/arg3");
+
+        InvalidCommandFormatException exception1 = assertThrows(InvalidCommandFormatException.class,
+                () -> validator.validateArguments(command1, arguments));
+        InvalidCommandFormatException exception2 = assertThrows(InvalidCommandFormatException.class,
+                () -> validator.validateArguments(command2, arguments));
+        InvalidCommandFormatException exception3 = assertThrows(InvalidCommandFormatException.class,
+                () -> validator.validateArguments(command3, arguments));
+
+        assertEquals("Invalid number of argument \"/arg1\" !", exception1.getMessage());
+        assertEquals("Invalid number of argument \"/arg2\" !", exception2.getMessage());
+        assertEquals("Invalid number of argument \"/arg3\" !", exception3.getMessage());
+    }
+
+    @Test
+    public void validateArguments_missingArguments_throwsInvalidCommandFormatException() {
+        CommandValidator validator = new CommandValidator();
+
+        String command1 = "command /arg2 text1 /arg3 text2";
+        String command2 = "command /arg1 text1 /arg3 text2";
+        String command3 = "command /arg1 text1 /arg2 text2";
+
+        Set<String> arguments = new HashSet<>();
+        arguments.add("/arg1");
+        arguments.add("/arg2");
+        arguments.add("/arg3");
+
+        InvalidCommandFormatException exception1 = assertThrows(InvalidCommandFormatException.class,
+                () -> validator.validateArguments(command1, arguments));
+        InvalidCommandFormatException exception2 = assertThrows(InvalidCommandFormatException.class,
+                () -> validator.validateArguments(command2, arguments));
+        InvalidCommandFormatException exception3 = assertThrows(InvalidCommandFormatException.class,
+                () -> validator.validateArguments(command3, arguments));
+
+        assertEquals("Missing argument \"/arg1\" !", exception1.getMessage());
+        assertEquals("Missing argument \"/arg2\" !", exception2.getMessage());
+        assertEquals("Missing argument \"/arg3\" !", exception3.getMessage());
+    }
+}