Create unmark assignment parser tests

src/test/java/seedu/address/logic/parser/UnmarkAssignmentCommandParserTest.java

@@ -0,0 +1,91 @@
+package seedu.address.logic.parser;
+
+import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_ASSIGNMENT_INDEX;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_STUDENT_INDEX;
+import static seedu.address.logic.parser.CommandParserTestUtil.assertParseFailure;
+import static seedu.address.logic.parser.CommandParserTestUtil.assertParseSuccess;
+import static seedu.address.testutil.TypicalIndexes.INDEX_FIRST_ASSIGNMENT;
+import static seedu.address.testutil.TypicalIndexes.INDEX_FIRST_STUDENT;
+import static seedu.address.testutil.TypicalIndexes.INDEX_SECOND_ASSIGNMENT;
+import static seedu.address.testutil.TypicalIndexes.INDEX_SECOND_STUDENT;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.logic.Messages;
+import seedu.address.logic.commands.UnmarkAssignmentCommand;
+
+public class UnmarkAssignmentCommandParserTest {
+
+    private final UnmarkAssignmentCommandParser parser = new UnmarkAssignmentCommandParser();
+
+    @Test
+    public void parse_validArgs_returnsUnmarkAssignmentCommand() {
+        String userInput = " " + PREFIX_STUDENT_INDEX + INDEX_FIRST_STUDENT.getOneBased() + " "
+                + PREFIX_ASSIGNMENT_INDEX + INDEX_FIRST_ASSIGNMENT.getOneBased();
+        assertParseSuccess(parser, userInput, new UnmarkAssignmentCommand(INDEX_FIRST_STUDENT, INDEX_FIRST_ASSIGNMENT));
+    }
+
+    @Test
+    public void parse_invalidArgs_throwsParseException() {
+        assertParseFailure(parser, "a", String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                UnmarkAssignmentCommand.MESSAGE_USAGE));
+    }
+
+    @Test
+    public void parse_missingPrefixes_throwsParseException() {
+        // Missing both prefixes
+        String userInput = "1 1";
+        assertParseFailure(parser, userInput, String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                UnmarkAssignmentCommand.MESSAGE_USAGE));
+
+        // Missing student prefix
+        userInput = "1 " + PREFIX_ASSIGNMENT_INDEX + "1";
+        assertParseFailure(parser, userInput, String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                UnmarkAssignmentCommand.MESSAGE_USAGE));
+
+        // Missing assignment prefix
+        userInput = PREFIX_STUDENT_INDEX + "1";
+        assertParseFailure(parser, userInput, String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                UnmarkAssignmentCommand.MESSAGE_USAGE));
+    }
+
+    @Test
+    public void parse_duplicatePrefixes_throwsParseException() {
+        // Duplicate student prefix
+        String duplicateStudentInput = " " + PREFIX_STUDENT_INDEX + INDEX_FIRST_STUDENT.getOneBased() + " "
+                + PREFIX_STUDENT_INDEX + INDEX_SECOND_STUDENT + " " + PREFIX_ASSIGNMENT_INDEX + INDEX_FIRST_ASSIGNMENT;
+        Prefix[] duplicatedStudentPrefixes = { PREFIX_STUDENT_INDEX };
+        assertParseFailure(parser, duplicateStudentInput,
+                Messages.getErrorMessageForDuplicatePrefixes(duplicatedStudentPrefixes));
+
+        // Duplicate assignment prefix
+        String duplicateAssignmentInput = " " + PREFIX_STUDENT_INDEX + INDEX_FIRST_STUDENT.getOneBased() + " "
+                + PREFIX_ASSIGNMENT_INDEX + INDEX_FIRST_ASSIGNMENT + " "
+                + PREFIX_ASSIGNMENT_INDEX + INDEX_SECOND_ASSIGNMENT;
+        Prefix[] duplicatedAssignmentPrefixes = { PREFIX_ASSIGNMENT_INDEX };
+        assertParseFailure(parser, duplicateAssignmentInput,
+                Messages.getErrorMessageForDuplicatePrefixes(duplicatedAssignmentPrefixes));
+    }
+
+    @Test
+    public void parse_nonNumericIndexes_throwsParseException() {
+        // Non-numeric student index
+        String userInput = PREFIX_STUDENT_INDEX + "a " + PREFIX_ASSIGNMENT_INDEX + "1";
+        assertParseFailure(parser, userInput, String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                UnmarkAssignmentCommand.MESSAGE_USAGE));
+
+        // Non-numeric assignment index
+        userInput = PREFIX_STUDENT_INDEX + "1 " + PREFIX_ASSIGNMENT_INDEX + "b";
+        assertParseFailure(parser, userInput, String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                UnmarkAssignmentCommand.MESSAGE_USAGE));
+    }
+
+    @Test
+    public void parse_emptyInput_throwsParseException() {
+        // Empty input
+        assertParseFailure(parser, "", String.format(MESSAGE_INVALID_COMMAND_FORMAT,
+                UnmarkAssignmentCommand.MESSAGE_USAGE));
+    }
+
+}