1 files changed, 46 insertions, 0 deletions
diff --git a/devtools/client/jsonview/test/browser_jsonview_valid_json.js b/devtools/client/jsonview/test/browser_jsonview_valid_json.js
new file mode 100644
index 0000000000..8ffd1dc1d5
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_valid_json.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "valid_json.json";
+
+add_task(async function () {
+  info("Test valid JSON started");
+
+  const tab = await addJsonViewTab(TEST_JSON_URL);
+
+  ok(
+    tab.linkedBrowser.contentPrincipal.isNullPrincipal,
+    "Should have null principal"
+  );
+
+  is(await countRows(), 3, "There must be three rows");
+
+  const objectCellCount = await getElementCount(
+    ".jsonPanelBox .treeTable .objectCell"
+  );
+  is(objectCellCount, 1, "There must be one object cell");
+
+  const objectCellText = await getElementText(
+    ".jsonPanelBox .treeTable .objectCell"
+  );
+  is(objectCellText, "", "The summary is hidden when object is expanded");
+
+  // Clicking the value does not collapse it (so that it can be selected and copied).
+  await clickJsonNode(".jsonPanelBox .treeTable .treeValueCell");
+  is(await countRows(), 3, "There must still be three rows");
+
+  // Clicking the label collapses the auto-expanded node.
+  await clickJsonNode(".jsonPanelBox .treeTable .treeLabel");
+  is(await countRows(), 1, "There must be one row");
+
+  // Collapsed nodes are preserved when switching panels.
+  await selectJsonViewContentTab("headers");
+  await selectJsonViewContentTab("json");
+  is(await countRows(), 1, "There must still be one row");
+});
+
+function countRows() {
+  return getElementCount(".jsonPanelBox .treeTable .treeRow");
+}