package function.builtin.predicate;

import static testutil.TestUtilities.evaluateString;
import static testutil.TypeAssertions.*;

import org.junit.Test;

import function.ArgumentValidator.*;

public class EQUALTester {

    @Test
    public void equalWithTwoEqualAtoms() {
        String input = "(equal 'a 'a)";

        assertT(evaluateString(input));
    }

    @Test
    public void equalWithTwoUnequalAtoms() {
        String input = "(equal 'a 'b)";

        assertNil(evaluateString(input));
    }

    @Test
    public void equalWithTwoEqualNumbers() {
        String input = "(equal -4 -4)";

        assertT(evaluateString(input));
    }

    @Test
    public void equalWithTwoUnequalNumbers() {
        String input = "(equal +5 +7)";

        assertNil(evaluateString(input));
    }

    @Test
    public void equalWithTwoEqualStrings() {
        String input = "(equal \"potato\" \"potato\")";

        assertT(evaluateString(input));
    }

    @Test
    public void equalWithTwoUnequalStrings() {
        String input = "(equal \"tomato\" \"potato\")";

        assertNil(evaluateString(input));
    }

    @Test
    public void equalWithTwoDifferentCasedStrings() {
        String input = "(equal \"Potato\" \"potato\")";

        assertNil(evaluateString(input));
    }

    @Test
    public void equalWithAtomAndList() {
        String input = "(equal \"string\" '(m i k e))";

        assertNil(evaluateString(input));
    }

    @Test
    public void equalWithListAndAtom() {
        String input = "(equal '(m i k e) \"string\")";

        assertNil(evaluateString(input));
    }

    @Test
    public void equalWithTwoEqualLists() {
        String input = "(equal '(1 2 3) '(1 2 3))";

        assertT(evaluateString(input));
    }

    @Test
    public void equalWithTwoUnequalLists() {
        String input = "(equal '(1 2 3) '(1 3 3))";

        assertNil(evaluateString(input));
    }

    @Test
    public void equalWithTwoEqualNestedLists() {
        String input = "(equal '(1 ((2) 3)) '(1 ((2) 3)))";

        assertT(evaluateString(input));
    }

    @Test(expected = TooManyArgumentsException.class)
    public void equalWithTooManyArguments() {
        evaluateString("(equal 1 2 3)");
    }

    @Test(expected = TooFewArgumentsException.class)
    public void equalWithTooFewArguments() {
        evaluateString("(equal 1)");
    }

}