1 files changed, 38 insertions, 0 deletions
diff --git a/devtools/client/framework/test/browser_toolbox_view_source_style_editor_fallback.js b/devtools/client/framework/test/browser_toolbox_view_source_style_editor_fallback.js
new file mode 100644
index 0000000000..b895d0a80e
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+++ b/devtools/client/framework/test/browser_toolbox_view_source_style_editor_fallback.js
@@ -0,0 +1,38 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that Toolbox#viewSourceInStyleEditor does fall back to view-source
+ */
+
+const TEST_URL = `data:text/html,<!DOCTYPE html><meta charset=utf8>Got no style`;
+const CSS_URL = `${URL_ROOT_SSL}doc_theme.css`;
+
+add_task(async function () {
+  // start on webconsole since it doesn't have much activity so we're less vulnerable
+  // to pending promises.
+  const toolbox = await openNewTabAndToolbox(TEST_URL, "webconsole");
+
+  const onTabOpen = BrowserTestUtils.waitForNewTab(
+    gBrowser,
+    url => url == `view-source:${CSS_URL}`,
+    true
+  );
+
+  info("View source of an existing file that isn't used by the page");
+  const fileFound = await toolbox.viewSourceInStyleEditorByURL(CSS_URL, 0);
+  ok(
+    !fileFound,
+    "viewSourceInStyleEditorByURL should resolve to false if source isn't found."
+  );
+
+  info("Waiting for view-source tab to open");
+  const viewSourceTab = await onTabOpen;
+  ok(true, "The view source tab was opened");
+  await removeTab(viewSourceTab);
+
+  info("Check that the current panel is the console");
+  is(toolbox.currentToolId, "webconsole", "Console is still selected");
+
+  await closeToolboxAndTab(toolbox);
+});