1 files changed, 36 insertions, 0 deletions
diff --git a/devtools/client/inspector/flexbox/test/browser_flexbox_sizing_info_exists.js b/devtools/client/inspector/flexbox/test/browser_flexbox_sizing_info_exists.js
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index 0000000000..e353eea0db
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+++ b/devtools/client/inspector/flexbox/test/browser_flexbox_sizing_info_exists.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that the flex item sizing information exists when a flex item is selected.
+
+const TEST_URI = URL_ROOT + "doc_flexbox_specific_cases.html";
+
+add_task(async function () {
+  await addTab(TEST_URI);
+  const { inspector, flexboxInspector } = await openLayoutView();
+  const { document: doc } = flexboxInspector;
+
+  // Select a flex item in the test document and wait for the sizing info to be rendered.
+  // Note that we select an item that has base, delta and final sizes, so we can check
+  // those sections exists.
+  const onFlexItemSizingRendered = waitForDOM(doc, "ul.flex-item-sizing");
+  await selectNode(".container.growing .item", inspector);
+  const [flexSizingContainer] = await onFlexItemSizingRendered;
+
+  ok(flexSizingContainer, "The flex sizing exists in the DOM");
+
+  info("Check that the base, flexibility and final sizes are displayed");
+  const allSections = [
+    ...flexSizingContainer.querySelectorAll(".section .name"),
+  ];
+  const allSectionTitles = allSections.map(el => el.textContent);
+
+  ["Base Size", "Flexibility", "Final Size"].forEach((expectedTitle, i) => {
+    ok(
+      allSectionTitles[i].includes(expectedTitle),
+      `Sizing section #${i + 1} (${expectedTitle}) was found`
+    );
+  });
+});