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<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
// Ensure that context2d.getTransform works
const epsilon = 1e-5;
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
test(function(t) {
assert_array_equals(ctx.getTransform().toFloat32Array(),
[1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
"Assert that an untransformed matrix is identity");
ctx.scale(2, 3);
transform = ctx.getTransform();
assert_array_equals(ctx.getTransform().toFloat32Array(),
[2, 0, 0, 0, 0, 3, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
"Assert that context2d scaling works");
ctx.rotate(Math.PI/2);
transform = ctx.getTransform();
assert_array_approx_equals(ctx.getTransform().toFloat32Array(),
[0, 3, 0, 0, -2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], epsilon,
"Assert that context2d rotate works");
ctx.translate(1, -1);
transform = ctx.getTransform();
assert_array_approx_equals(ctx.getTransform().toFloat32Array(),
[0, 3, 0, 0, -2, 0, 0, 0, 0, 0, 1, 0, 2, 3, 0, 1], epsilon,
"Assert context2d translate works.");
ctx.resetTransform();
assert_array_equals(ctx.getTransform().toFloat32Array(),
[1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
"Assert that a reset matrix is identity");
}, 'This test ensures that getTransform works correctly.');
</script>
</body>
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