ParserTest.java

package seedu.addressbook.parser;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static seedu.addressbook.common.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
import static seedu.addressbook.common.Messages.MESSAGE_INVALID_PERSON_DISPLAYED_INDEX;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import org.junit.Before;
import org.junit.Test;

import seedu.addressbook.commands.AddCommand;
import seedu.addressbook.commands.ClearCommand;
import seedu.addressbook.commands.Command;
import seedu.addressbook.commands.DeleteCommand;
import seedu.addressbook.commands.ExitCommand;
import seedu.addressbook.commands.FindCommand;
import seedu.addressbook.commands.HelpCommand;
import seedu.addressbook.commands.IncorrectCommand;
import seedu.addressbook.commands.ListCommand;
import seedu.addressbook.commands.SortCommand;
import seedu.addressbook.commands.ViewAllCommand;
import seedu.addressbook.commands.ViewCommand;
import seedu.addressbook.data.exception.IllegalValueException;
import seedu.addressbook.data.person.Address;
import seedu.addressbook.data.person.Email;
import seedu.addressbook.data.person.Name;
import seedu.addressbook.data.person.Person;
import seedu.addressbook.data.person.Phone;
import seedu.addressbook.data.person.ReadOnlyPerson;
import seedu.addressbook.data.tag.Tag;
import seedu.addressbook.data.tag.UniqueTagList;

public class ParserTest {

    private Parser parser;

    @Before
    public void setUp() {
        parser = new Parser();
    }

    /*
     * Note how the names of the test methods does not follow the normal naming convention.
     * That is because our coding standard allows a different naming convention for test methods.
     */

    @Test
    public void parse_emptyInput_returnsIncorrect() {
        final String[] emptyInputs = { "", "  ", "\n  \n" };
        final String resultMessage = String.format(MESSAGE_INVALID_COMMAND_FORMAT, HelpCommand.MESSAGE_USAGE);
        parseAndAssertIncorrectWithMessage(resultMessage, emptyInputs);
    }

    @Test
    public void parse_unknownCommandWord_returnsHelp() {
        final String input = "unknowncommandword arguments arguments";
        parseAndAssertCommandType(input, HelpCommand.class);
    }

    /*
     * Tests for 0-argument commands =======================================================================
     */

    @Test
    public void parse_helpCommand_parsedCorrectly() {
        final String input = "help";
        parseAndAssertCommandType(input, HelpCommand.class);
    }

    @Test
    public void parse_clearCommand_parsedCorrectly() {
        final String input = "clear";
        parseAndAssertCommandType(input, ClearCommand.class);
    }

    @Test
    public void parse_listCommand_parsedCorrectly() {
        final String input = "list";
        parseAndAssertCommandType(input, ListCommand.class);
    }

    @Test
    public void parse_sortCommand_parsedCorrectly() {
        final String input = "sort";
        parseAndAssertCommandType(input, SortCommand.class);
    }

    @Test
    public void parse_exitCommand_parsedCorrectly() {
        final String input = "exit";
        parseAndAssertCommandType(input, ExitCommand.class);
    }

    /*
     * Tests for ingle index argument commands ===============================================================
     */

    @Test
    public void parse_deleteCommandNoArgs_errorMessage() {
        final String[] inputs = { "delete", "delete " };
        final String resultMessage = String.format(MESSAGE_INVALID_COMMAND_FORMAT, DeleteCommand.MESSAGE_USAGE);
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_deleteCommandArgsIsNotSingleNumber_errorMessage() {
        final String[] inputs = { "delete notAnumber ", "delete 8*wh12", "delete 1 2 3 4 5" };
        final String resultMessage = MESSAGE_INVALID_PERSON_DISPLAYED_INDEX;
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_deleteCommandNumericArg_indexParsedCorrectly() {
        final int testIndex = 1;
        final String input = "delete " + testIndex;
        final DeleteCommand result = parseAndAssertCommandType(input, DeleteCommand.class);
        assertEquals(result.getTargetIndex(), testIndex);
    }

    @Test
    public void viewCommandNoArgs_errorMessage() {
        final String[] inputs = { "view", "view " };
        final String resultMessage = String.format(MESSAGE_INVALID_COMMAND_FORMAT, ViewCommand.MESSAGE_USAGE);
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_viewCommandArgsIsNotSingleNumber_errorMessage() {
        final String[] inputs = { "view notAnumber ", "view 8*wh12", "view 1 2 3 4 5" };
        final String resultMessage = MESSAGE_INVALID_PERSON_DISPLAYED_INDEX;
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_viewCommandNumericArg_indexParsedCorrectly() {
        final int testIndex = 2;
        final String input = "view " + testIndex;
        final ViewCommand result = parseAndAssertCommandType(input, ViewCommand.class);
        assertEquals(result.getTargetIndex(), testIndex);
    }

    @Test
    public void parse_viewAllCommandNoArgs_errorMessage() {
        final String[] inputs = { "viewall", "viewall " };
        final String resultMessage =
                String.format(MESSAGE_INVALID_COMMAND_FORMAT, ViewAllCommand.MESSAGE_USAGE);
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_viewAllCommandArgsIsNotSingleNumber_errorMessage() {
        final String[] inputs = { "viewall notAnumber ", "viewall 8*wh12", "viewall 1 2 3 4 5" };
        final String resultMessage = MESSAGE_INVALID_PERSON_DISPLAYED_INDEX;
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_viewAllCommandNumericArg_indexParsedCorrectly() {
        final int testIndex = 3;
        final String input = "viewall " + testIndex;
        final ViewAllCommand result = parseAndAssertCommandType(input, ViewAllCommand.class);
        assertEquals(result.getTargetIndex(), testIndex);
    }

    /*
     * Tests for find persons by keyword in name command ===================================================
     */

    @Test
    public void parse_findCommandInvalidArgs_errorMessage() {
        // no keywords
        final String[] inputs = {
            "find",
            "find "
        };
        final String resultMessage =
                String.format(MESSAGE_INVALID_COMMAND_FORMAT, FindCommand.MESSAGE_USAGE);
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_findCommandValidArgs_parsedCorrectly() {
        final String[] keywords = { "key1", "key2", "key3" };
        final Set<String> keySet = new HashSet<>(Arrays.asList(keywords));

        final String input = "find " + String.join(" ", keySet);
        final FindCommand result =
                parseAndAssertCommandType(input, FindCommand.class);
        assertEquals(keySet, result.getKeywords());
    }

    @Test
    public void parse_findCommandDuplicateKeys_parsedCorrectly() {
        final String[] keywords = { "key1", "key2", "key3" };
        final Set<String> keySet = new HashSet<>(Arrays.asList(keywords));

        // duplicate every keyword
        final String input = "find " + String.join(" ", keySet) + " " + String.join(" ", keySet);
        final FindCommand result =
                parseAndAssertCommandType(input, FindCommand.class);
        assertEquals(keySet, result.getKeywords());
    }

    /*
     * Tests for add person command ==============================================================================
     */

    @Test
    public void parse_addCommandInvalidArgs_errorMessage() {
        final String[] inputs = {
            "add",
            "add ",
            "add wrong args format",
            // no phone prefix
            String.format("add $s $s e/$s a/$s", Name.EXAMPLE, Phone.EXAMPLE, Email.EXAMPLE, Address.EXAMPLE),
            // no email prefix
            String.format("add $s p/$s $s a/$s", Name.EXAMPLE, Phone.EXAMPLE, Email.EXAMPLE, Address.EXAMPLE),
            // no address prefix
            String.format("add $s p/$s e/$s $s", Name.EXAMPLE, Phone.EXAMPLE, Email.EXAMPLE, Address.EXAMPLE)
        };
        final String resultMessage = String.format(MESSAGE_INVALID_COMMAND_FORMAT, AddCommand.MESSAGE_USAGE);
        parseAndAssertIncorrectWithMessage(resultMessage, inputs);
    }

    @Test
    public void parse_addCommandInvalidPersonDataInArgs_errorMessge() {
        final String invalidName = "[]\\[;]";
        final String validName = Name.EXAMPLE;
        final String invalidPhoneArg = "p/not__numbers";
        final String validPhoneArg = "p/" + Phone.EXAMPLE;
        final String invalidEmailArg = "e/notAnEmail123";
        final String validEmailArg = "e/" + Email.EXAMPLE;
        final String invalidTagArg = "t/invalid_-[.tag";

        // address can be any string, so no invalid address
        final String addCommandFormatString = "add $s $s $s a/" + Address.EXAMPLE;

        // test each incorrect person data field argument individually
        final String[] inputs = {
                // invalid name
                String.format(addCommandFormatString, invalidName, validPhoneArg, validEmailArg),
                // invalid phone
                String.format(addCommandFormatString, validName, invalidPhoneArg, validEmailArg),
                // invalid email
                String.format(addCommandFormatString, validName, validPhoneArg, invalidEmailArg),
                // invalid tag
                String.format(addCommandFormatString, validName, validPhoneArg, validEmailArg) + " " + invalidTagArg
        };
        for (String input : inputs) {
            parseAndAssertCommandType(input, IncorrectCommand.class);
        }
    }

    @Test
    public void parse_addCommandValidPersonData_parsedCorrectly() {
        final Person testPerson = generateTestPerson();
        final String input = convertPersonToAddCommandString(testPerson);
        final AddCommand result = parseAndAssertCommandType(input, AddCommand.class);
        assertEquals(result.getPerson(), testPerson);
    }

    @Test
    public void parse_addCommandDuplicateTags_merged() throws IllegalValueException {
        final Person testPerson = generateTestPerson();
        String input = convertPersonToAddCommandString(testPerson);
        for (Tag tag : testPerson.getTags()) {
            // create duplicates by doubling each tag
            input += " t/" + tag.tagName;
        }

        final AddCommand result = parseAndAssertCommandType(input, AddCommand.class);
        assertEquals(result.getPerson(), testPerson);
    }

    private static Person generateTestPerson() {
        try {
            return new Person(
                new Name(Name.EXAMPLE),
                new Phone(Phone.EXAMPLE, true),
                new Email(Email.EXAMPLE, false),
                new Address(Address.EXAMPLE, true),
                new UniqueTagList(new Tag("tag1"), new Tag("tag2"), new Tag("tag3"))
            );
        } catch (IllegalValueException ive) {
            throw new RuntimeException("test person data should be valid by definition");
        }
    }

    private static String convertPersonToAddCommandString(ReadOnlyPerson person) {
        String addCommand = "add "
                + person.getName().fullName
                + (person.getPhone().isPrivate() ? " pp/" : " p/") + person.getPhone().value
                + (person.getEmail().isPrivate() ? " pe/" : " e/") + person.getEmail().value
                + (person.getAddress().isPrivate() ? " pa/" : " a/") + person.getAddress().value;
        for (Tag tag : person.getTags()) {
            addCommand += " t/" + tag.tagName;
        }
        return addCommand;
    }

    /*
     * Utility methods ====================================================================================
     */

    /**
     * Asserts that parsing the given inputs will return IncorrectCommand with the given feedback message.
     */
    private void parseAndAssertIncorrectWithMessage(String feedbackMessage, String... inputs) {
        for (String input : inputs) {
            final IncorrectCommand result = parseAndAssertCommandType(input, IncorrectCommand.class);
            assertEquals(result.feedbackToUser, feedbackMessage);
        }
    }

    /**
     * Parses input and asserts the class/type of the returned command object.
     *
     * @param input to be parsed
     * @param expectedCommandClass expected class of returned command
     * @return the parsed command object
     */
    private <T extends Command> T parseAndAssertCommandType(String input, Class<T> expectedCommandClass) {
        final Command result = parser.parseCommand(input);
        assertTrue(result.getClass().isAssignableFrom(expectedCommandClass));
        return (T) result;
    }
}