Add Test Cases for ListMeeting and Improve Code Quality

src/main/java/seedu/address/logic/commands/ListMeetingCommand.java

@@ -37,4 +37,13 @@ public CommandResult execute(Model model) {
         return new CommandResult(MESSAGE_SUCCESS, CommandSpecific.MEETING);
     }
 
+    @Override
+    public boolean equals(Object other) {
+        if (!(other instanceof ListMeetingCommand)) {
+            return false;
+        }
+        ListMeetingCommand otherCmd = (ListMeetingCommand) other;
+        return otherCmd.dateKeyword == this.dateKeyword;
+    }
+
 }

src/main/java/seedu/address/logic/parser/ListMeetingCommandParser.java

@@ -1,6 +1,5 @@
 package seedu.address.logic.parser;
 
-import static seedu.address.commons.core.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_DATE;
 
 import seedu.address.logic.commands.ListMeetingCommand;
@@ -18,12 +17,7 @@ public ListMeetingCommand parse(String args) throws ParseException {
             return new ListMeetingCommand(DateKeyword.ALL_TIME);
         }
 
-        try {
-            DateKeyword dateKeyword = ParserUtil.parseDateKeyword(argumentMultimap.getValue(PREFIX_DATE).get());
-            return new ListMeetingCommand(dateKeyword);
-        } catch (ParseException pe) {
-            throw new ParseException(String.format(MESSAGE_INVALID_COMMAND_FORMAT,
-                    ListMeetingCommand.MESSAGE_USAGE), pe);
-        }
+        DateKeyword dateKeyword = ParserUtil.parseDateKeyword(argumentMultimap.getValue(PREFIX_DATE).get());
+        return new ListMeetingCommand(dateKeyword);
     }
 }

src/main/java/seedu/address/logic/parser/ParserUtil.java

@@ -31,7 +31,7 @@ public class ParserUtil {
 
     public static final String MESSAGE_INVALID_INDEX = "Index is not a non-zero unsigned integer.";
     public static final String MESSAGE_INVALID_DATE_KEYWORD =
-            "The date keyword should be one of tomorrow, week, or month";
+            "The date keyword should be either tomorrow, week, or month";
 
     /**
      * Parses {@code oneBasedIndex} into an {@code Index} and returns it. Leading and trailing whitespaces will be

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

@@ -0,0 +1,35 @@
+package seedu.address.logic.parser;
+
+import static seedu.address.logic.parser.CommandParserTestUtil.assertParseFailure;
+import static seedu.address.logic.parser.CommandParserTestUtil.assertParseSuccess;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.logic.commands.ListMeetingCommand;
+
+public class ListMeetingCommandParserTest {
+
+    private ListMeetingCommandParser parser = new ListMeetingCommandParser();
+
+    @Test
+    public void parse_validArguments_success() {
+        // Without any arguments
+        assertParseSuccess(parser, "", new ListMeetingCommand(DateKeyword.ALL_TIME));
+
+        // With tomorrow date keyword
+        assertParseSuccess(parser, " d/tomorrow", new ListMeetingCommand(DateKeyword.TOMORROW));
+
+        // With week date keyword
+        assertParseSuccess(parser, " d/week", new ListMeetingCommand(DateKeyword.THIS_WEEK));
+
+        // With month date keyword
+        assertParseSuccess(parser, " d/month", new ListMeetingCommand(DateKeyword.THIS_MONTH));
+    }
+
+    @Test
+    public void parse_invalidDateKeyword_failure() {
+        // Invalid date keyword
+        assertParseFailure(parser, " d/thismonth", ParserUtil.MESSAGE_INVALID_DATE_KEYWORD);
+    }
+
+}