1 files changed, 104 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/element/manual/line-styles/setLineDash.html b/testing/web-platform/tests/html/canvas/element/manual/line-styles/setLineDash.html
new file mode 100644
index 0000000000..6b8d131da4
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/element/manual/line-styles/setLineDash.html
@@ -0,0 +1,104 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>setLineDash</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+<canvas id="canvas"></canvas>
+<script>
+test(function() {
+  var canvas = document.getElementById('canvas');
+  var ctx = canvas.getContext('2d');
+
+  var initial = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+  ctx.setLineDash(initial);
+  assert_array_equals(ctx.getLineDash(), initial, "line dash sanity");
+
+  ctx.setLineDash([Infinity]);
+  assert_array_equals(ctx.getLineDash(), initial, "Inf doesn't reset line dash");
+
+  ctx.setLineDash([NaN]);
+  assert_array_equals(ctx.getLineDash(), initial, "NaN doesn't reset line dash");
+
+  ctx.setLineDash([-1]);
+  assert_array_equals(ctx.getLineDash(), initial, "Negative doesn't reset line dash");
+}, "Invalid arguments to setLineDash()");
+
+test(function() {
+  var canvas = document.getElementById('canvas');
+  var ctx = canvas.getContext('2d');
+  assert_equals(ctx.lineDashOffset, 0);
+
+  ctx.setLineDash([15, 10]);
+  ctx.lineDashOffset = 5;
+  ctx.strokeRect(10,10,100,100);
+
+  var lineDash = ctx.getLineDash();
+  assert_array_equals(lineDash, [15, 10]);
+  assert_equals(ctx.lineDashOffset, 5);
+
+  ctx.setLineDash([5, 10, 15]);
+  ctx.strokeRect(20, 20, 120, 120);
+  lineDash = ctx.getLineDash();
+  assert_array_equals(lineDash, [5, 10, 15, 5, 10, 15]);
+
+  ctx.setLineDash(["1", 2]);
+  lineDash = ctx.getLineDash();
+  assert_array_equals(lineDash, [1, 2]);
+
+  ctx.clearRect(0, 0, 700, 700);
+  assert_equals(ctx.lineDashOffset, 5);
+
+  ctx.setLineDash([20, 10]);
+  ctx.lineDashOffset = 0;
+  // Make the test immune to plaform anti-aliasing discrepancies.
+  ctx.lineWidth = 4;
+  ctx.strokeStyle = '#00FF00';
+  ctx.strokeRect(10.5, 10.5, 30, 30);
+
+  _assertPixel(canvas, 25, 10, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 35, 10, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 40, 25, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 40, 35, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 25, 40, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 15, 40, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 10, 25, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 10, 15, 0, 0, 0, 0, 0);
+
+  // Verify that lineDashOffset works as expected.
+  ctx.lineDashOffset = 20;
+  ctx.strokeRect(50.5, 10.5, 30, 30);
+  _assertPixel(canvas, 55, 10, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 65, 10, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 80, 15, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 80, 25, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 75, 40, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 65, 40, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 50, 35, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 50, 25, 0, 255, 0, 255, 0);
+
+  // Verify negative lineDashOffset.
+  ctx.lineDashOffset = -10;
+  ctx.strokeRect(90.5, 10.5, 30, 30);
+  _assertPixel(canvas, 95, 10, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 105, 10, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 120, 15, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 120, 25, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 115, 40, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 105, 40, 0, 255, 0, 255, 0);
+  _assertPixel(canvas, 90, 35, 0, 0, 0, 0, 0);
+  _assertPixel(canvas, 90, 25, 0, 255, 0, 255, 0);
+
+  // Ensure that all zeros or negative pattern does not cause error state in
+  // context.
+  ctx.setLineDash([0, 0]);
+  ctx.strokeRect(130.5, 10.5, 10, 10);
+  ctx.setLineDash([-1]);
+  ctx.strokeRect(130.5, 10.5, 10, 10);
+  _assertPixel(canvas, 135, 15, 0, 0, 0, 0, 0);
+  ctx.fillStyle = '#00FF00';
+  ctx.fillRect(130, 10, 10, 10);
+  _assertPixel(canvas, 135, 15, 0, 255, 0, 255, 0);
+});
+</script>