Merge pull request nus-cs2113-AY2021S1#62 from tammykoh/master

Created ParserTest

src/test/java/seedu/duke/parser/ParserTest.java

@@ -0,0 +1,86 @@
+package seedu.duke.parser;
+
+import org.junit.jupiter.api.Test;
+import seedu.duke.command.Command;
+import seedu.duke.command.AddCommand;
+import seedu.duke.command.ByeCommand;
+import seedu.duke.command.CompareCommand;
+import seedu.duke.command.ClearCommand;
+import seedu.duke.command.DeleteCommand;
+import seedu.duke.command.EditCommand;
+import seedu.duke.command.ListCommand;
+import seedu.duke.command.LogInCommand;
+import seedu.duke.exception.DukeException;
+
+//import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class ParserTest {
+
+    @Test
+    public void parse_unknownCommand_throwDukeException() {
+        final String input = "hello, testing";
+        assertThrows(DukeException.class, () -> Parser.parse(input));
+    }
+
+    @Test
+    public void parse_addCommand_parsedCorrectly() throws DukeException {
+        final String input = "add CS2113 Lecture /fri /1600-1800 /LT15";
+        parseAndAssertCommandType(input, AddCommand.class);
+    }
+
+    @Test
+    public void parse_byeCommand_parsedCorrectly() throws DukeException {
+        final String input = "bye";
+        parseAndAssertCommandType(input, ByeCommand.class);
+    }
+
+    @Test
+    public void parse_clearCommand_parsedCorrectly() throws DukeException {
+        final String input = "clear /sun";
+        parseAndAssertCommandType(input, ClearCommand.class);
+    }
+
+    @Test
+    public void parse_compareCommand_parsedCorrectly() throws DukeException {
+        final String input = "compare /Alex /mon";
+        parseAndAssertCommandType(input, CompareCommand.class);
+    }
+
+    @Test
+    public void parse_deleteCommand_parsedCorrectly() throws DukeException {
+        final String input = "delete /tue /2";
+        parseAndAssertCommandType(input, DeleteCommand.class);
+    }
+
+    @Test
+    public void parse_editCommand_parsedCorrectly() throws DukeException {
+        final String input = "edit /mon /2 /1000-1200";
+        parseAndAssertCommandType(input, EditCommand.class);
+    }
+
+    @Test
+    public void parse_listCommand_parsedCorrectly() throws DukeException {
+        final String input = "list /all";
+        parseAndAssertCommandType(input, ListCommand.class);
+    }
+
+    @Test
+    public void parse_loginCommand_parsedCorrectly() throws DukeException {
+        final String input = "login John /1324";
+        parseAndAssertCommandType(input, LogInCommand.class);
+    }
+
+    /**
+     * Parses input and asserts the class/type of the returned command object.
+     *
+     * @param input to be parsed
+     * @param expectedCommandClass expected class of returned command
+     */
+    private <T extends Command> void parseAndAssertCommandType(String input, Class<T> expectedCommandClass)
+            throws DukeException {
+        final Command result = Parser.parse(input);
+        assertTrue(result.getClass().isAssignableFrom(expectedCommandClass));
+    }
+}