1 files changed, 78 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/src/har/test/browser_net_har_import_no-mime.js b/devtools/client/netmonitor/src/har/test/browser_net_har_import_no-mime.js
new file mode 100644
index 0000000000..91c5160217
--- /dev/null
+++ b/devtools/client/netmonitor/src/har/test/browser_net_har_import_no-mime.js
@@ -0,0 +1,78 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Tests importing HAR with missing `response.content.mimeType` does not crash the netmonitor.
+ */
+add_task(async () => {
+  const { monitor } = await initNetMonitor(SIMPLE_URL, {
+    requestCount: 1,
+  });
+
+  info("Starting test... ");
+
+  const { document, actions, store, windowRequire } = monitor.panelWin;
+  const Actions = windowRequire("devtools/client/netmonitor/src/actions/index");
+
+  const { HarImporter } = windowRequire(
+    "devtools/client/netmonitor/src/har/har-importer"
+  );
+
+  store.dispatch(Actions.batchEnable(false));
+
+  // Invalid HAR json which should contain `entries[0].response.content.mimeType`
+  const invalidHarJSON = {
+    log: {
+      version: "1.2",
+      pages: [
+        {
+          title: "bla",
+        },
+      ],
+      entries: [
+        {
+          request: {
+            method: "POST",
+            url: "https://bla.com",
+            httpVersion: "",
+            headers: [],
+            cookies: [],
+            queryString: [],
+          },
+          response: {
+            content: {
+              size: 1231,
+              text: '{"requests":[{"uri":"https://bla.com"}]}',
+            },
+            headers: [],
+          },
+          timings: {},
+          cache: {},
+        },
+      ],
+    },
+  };
+
+  // Import invalid Har file
+  const importer = new HarImporter(actions);
+  importer.import(JSON.stringify(invalidHarJSON));
+
+  const waitForResponsePanelOpen = waitUntil(() =>
+    document.querySelector("#response-panel")
+  );
+
+  // Open the response details panel
+  EventUtils.sendMouseEvent(
+    { type: "mousedown" },
+    document.querySelector(".request-list-item")
+  );
+  clickOnSidebarTab(document, "response");
+
+  await waitForResponsePanelOpen;
+  ok(true, "The response panel opened");
+
+  // Clean up
+  return teardown(monitor);
+});