1 files changed, 156 insertions, 0 deletions
diff --git a/devtools/client/inspector/grids/test/browser_grids_grid-outline-writing-mode.js b/devtools/client/inspector/grids/test/browser_grids_grid-outline-writing-mode.js
new file mode 100644
index 0000000000..c27a8b481f
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+++ b/devtools/client/inspector/grids/test/browser_grids_grid-outline-writing-mode.js
@@ -0,0 +1,156 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that the grid outline adjusts to match the container's writing mode.
+
+const TEST_URI = `
+  <style type='text/css'>
+    .grid {
+      display: grid;
+      width: 400px;
+      height: 300px;
+    }
+    .rtl {
+      direction: rtl;
+    }
+    .v-rl {
+      writing-mode: vertical-rl;
+    }
+    .v-lr {
+      writing-mode: vertical-lr;
+    }
+    .s-rl {
+      writing-mode: sideways-rl;
+    }
+    .s-lr {
+      writing-mode: sideways-lr;
+    }
+  </style>
+  <div class="grid">
+    <div id="cella">Cell A</div>
+    <div id="cellb">Cell B</div>
+    <div id="cellc">Cell C</div>
+  </div>
+  <div class="grid rtl">
+    <div id="cella">Cell A</div>
+    <div id="cellb">Cell B</div>
+    <div id="cellc">Cell C</div>
+  </div>
+  <div class="grid v-rl">
+    <div id="cella">Cell A</div>
+    <div id="cellb">Cell B</div>
+    <div id="cellc">Cell C</div>
+  </div>
+  <div class="grid v-lr">
+    <div id="cella">Cell A</div>
+    <div id="cellb">Cell B</div>
+    <div id="cellc">Cell C</div>
+  </div>
+  <div class="grid s-rl">
+    <div id="cella">Cell A</div>
+    <div id="cellb">Cell B</div>
+    <div id="cellc">Cell C</div>
+  </div>
+  <div class="grid s-lr">
+    <div id="cella">Cell A</div>
+    <div id="cellb">Cell B</div>
+    <div id="cellc">Cell C</div>
+  </div>
+`;
+
+add_task(async function () {
+  await pushPref("devtools.gridinspector.maxHighlighters", 1);
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+
+  const { inspector, gridInspector } = await openLayoutView();
+  const { document: doc } = gridInspector;
+  const { highlighters, store } = inspector;
+
+  info("Checking the initial state of the Grid Inspector.");
+  ok(
+    !doc.getElementById("grid-outline-container"),
+    "There should be no grid outline shown."
+  );
+
+  let elements;
+
+  elements = await enableGrid(doc, highlighters, store, 0);
+  is(
+    elements[0].style.transform,
+    "matrix(1, 0, 0, 1, 0, 0)",
+    "Transform matches for horizontal-tb and ltr."
+  );
+  await disableGrid(doc, highlighters, store, 0);
+
+  elements = await enableGrid(doc, highlighters, store, 1);
+  is(
+    elements[0].style.transform,
+    "matrix(-1, 0, 0, 1, 200, 0)",
+    "Transform matches for horizontal-tb and rtl"
+  );
+  await disableGrid(doc, highlighters, store, 1);
+
+  elements = await enableGrid(doc, highlighters, store, 2);
+  is(
+    elements[0].style.transform,
+    "matrix(6.12323e-17, 1, -1, 6.12323e-17, 200, 0)",
+    "Transform matches for vertical-rl and ltr"
+  );
+  await disableGrid(doc, highlighters, store, 2);
+
+  elements = await enableGrid(doc, highlighters, store, 3);
+  is(
+    elements[0].style.transform,
+    "matrix(-6.12323e-17, 1, 1, 6.12323e-17, 0, 0)",
+    "Transform matches for vertical-lr and ltr"
+  );
+  await disableGrid(doc, highlighters, store, 3);
+
+  elements = await enableGrid(doc, highlighters, store, 4);
+  is(
+    elements[0].style.transform,
+    "matrix(6.12323e-17, 1, -1, 6.12323e-17, 200, 0)",
+    "Transform matches for sideways-rl and ltr"
+  );
+  await disableGrid(doc, highlighters, store, 4);
+
+  elements = await enableGrid(doc, highlighters, store, 5);
+  is(
+    elements[0].style.transform,
+    "matrix(6.12323e-17, -1, 1, 6.12323e-17, -9.18485e-15, 150)",
+    "Transform matches for sideways-lr and ltr"
+  );
+  await disableGrid(doc, highlighters, store, 5);
+});
+
+async function enableGrid(doc, highlighters, store, index) {
+  info(`Enabling the CSS grid highlighter for grid ${index}.`);
+  const onHighlighterShown = highlighters.once("grid-highlighter-shown");
+  const onCheckboxChange = waitUntilState(
+    store,
+    state => state.grids.length == 6 && state.grids[index].highlighted
+  );
+  const onGridOutlineRendered = waitForDOM(doc, "#grid-cell-group");
+  const gridList = doc.getElementById("grid-list");
+  gridList.children[index].querySelector("input").click();
+  await onHighlighterShown;
+  await onCheckboxChange;
+  return onGridOutlineRendered;
+}
+
+async function disableGrid(doc, highlighters, store, index) {
+  info(`Disabling the CSS grid highlighter for grid ${index}.`);
+  const onHighlighterShown = highlighters.once("grid-highlighter-hidden");
+  const onCheckboxChange = waitUntilState(
+    store,
+    state => state.grids.length == 6 && !state.grids[index].highlighted
+  );
+  const onGridOutlineRemoved = waitForDOM(doc, "#grid-cell-group", 0);
+  const gridList = doc.getElementById("grid-list");
+  gridList.children[index].querySelector("input").click();
+  await onHighlighterShown;
+  await onCheckboxChange;
+  return onGridOutlineRemoved;
+}