DOMMatrix-attributes.html

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This test has a WPT meta file that expects 8 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/geometry/DOMMatrix-attributes.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Geometry Interfaces: DOMMatrix attributes</title>

<link rel="help" href="https://drafts.fxtf.org/geometry/#dommatrix-attributes">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script>

const initial = {

    a: 1, b: 0, c: 0, d: 1, e: 0, f: 0,

    m11: 1, m12: 0, m13: 0, m14: 0,

    m21: 0, m22: 1, m23: 0, m24: 0,

    m31: 0, m32: 0, m33: 1, m34: 0,

    m41: 0, m42: 0, m43: 0, m44: 1,

};

// Attributes that always preserve is2D.

["a", "b", "c", "d", "e", "f",

 "m11", "m12", "m21", "m22", "m41", "m42" ].forEach(attribute => {

    test(() => {

        let m = new DOMMatrix();

        assert_true(m.is2D);

        assert_equals(m[attribute], initial[attribute]);

        m[attribute] = 42;

        assert_true(m.is2D);

        assert_equals(m[attribute], 42);

    }, `DOMMatrix.${attribute}`);

});

// Attributes that clear is2D for values other than 0 or -0.

["m13", "m14", "m23", "m24", "m31", "m32", "m34", "m43" ].forEach(attribute => {

    test(() => {

        let m = new DOMMatrix();

        assert_true(m.is2D);

        assert_equals(m[attribute], initial[attribute]);

        m[attribute] = 0;

        assert_true(m.is2D, "0 preserves is2D");

        assert_equals(m[attribute], 0);

        m[attribute] = -0;

        assert_true(m.is2D, "-0 preserves is2D");

        assert_equals(m[attribute], -0);

        m[attribute] = 42;

        assert_false(m.is2D, "a value other than 0 or -0 clears is2D");

        assert_equals(m[attribute], 42);

        m[attribute] = 0;

        assert_false(m.is2D, "is2D can never be set to true after having been set to false");

        assert_equals(m[attribute], 0);

    }, `DOMMatrix.${attribute}`);

});

// Attributes that clear is2D for values other than 1.

["m33", "m44" ].forEach(attribute => {

    test(() => {

        let m = new DOMMatrix();

        assert_true(m.is2D);

        assert_equals(m[attribute], initial[attribute]);

        m[attribute] = 1;

        assert_true(m.is2D, "1 preserves is2D");

        assert_equals(m[attribute], 1);

        m[attribute] = 42;

        assert_false(m.is2D, "a value other than 1 clears is2D");

        assert_equals(m[attribute], 42);

        m[attribute] = 1;

        assert_false(m.is2D, "is2D can never be set to true after having been set to false");

        assert_equals(m[attribute], 1);

    }, `DOMMatrix.${attribute}`);

});

</script>