1 files changed, 90 insertions, 0 deletions
diff --git a/devtools/client/inspector/computed/test/browser_computed_cycle_color.js b/devtools/client/inspector/computed/test/browser_computed_cycle_color.js
new file mode 100644
index 0000000000..37d468b5bd
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+++ b/devtools/client/inspector/computed/test/browser_computed_cycle_color.js
@@ -0,0 +1,90 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Computed view color cycling test.
+
+const TEST_URI = `
+  <style type="text/css">
+    .matches {
+      color: #f00;
+    }
+  </style>
+  <span id="matches" class="matches">Some styled text</span>
+`;
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { inspector, view } = await openComputedView();
+  await selectNode("#matches", inspector);
+
+  info("Checking the property itself");
+  let container = getComputedViewPropertyView(view, "color").valueNode;
+  await checkColorCycling(container, view);
+
+  info("Checking matched selectors");
+  container = await getComputedViewMatchedRules(view, "color");
+  await checkColorCycling(container, view);
+});
+
+async function checkColorCycling(container, view) {
+  const valueNode = container.querySelector(".computed-color");
+  const win = view.styleWindow;
+
+  // "Authored" (default; currently the computed value)
+  is(
+    valueNode.textContent,
+    "rgb(255, 0, 0)",
+    "Color displayed as an RGB value."
+  );
+
+  const tests = [
+    {
+      value: "hwb(0 0% 0%)",
+      comment: "Color displayed as an HWB value.",
+    },
+    {
+      value: "red",
+      comment: "Color displayed as a color name.",
+    },
+    {
+      value: "#f00",
+      comment: "Color displayed as a HEX value.",
+    },
+    {
+      value: "hsl(0, 100%, 50%)",
+      comment: "Color displayed as an HSL value.",
+    },
+    {
+      value: "rgb(255, 0, 0)",
+      comment: "Color displayed as an RGB value again.",
+    },
+  ];
+
+  for (const test of tests) {
+    await checkSwatchShiftClick(container, win, test.value, test.comment);
+  }
+}
+
+async function checkSwatchShiftClick(container, win, expectedValue, comment) {
+  const swatch = container.querySelector(".computed-colorswatch");
+  const valueNode = container.querySelector(".computed-color");
+  swatch.scrollIntoView();
+
+  const onUnitChange = swatch.once("unit-change");
+  EventUtils.synthesizeMouseAtCenter(
+    swatch,
+    {
+      type: "mousedown",
+      shiftKey: true,
+    },
+    win
+  );
+  // we need to have the mouse up event in order to make sure that the platform
+  // lets go of the last container, and is not waiting for something to happen.
+  // Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1442153
+  EventUtils.synthesizeMouseAtCenter(swatch, { type: "mouseup" }, win);
+  await onUnitChange;
+  is(valueNode.textContent, expectedValue, comment);
+}