1 files changed, 80 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg_pretty-print-06.js b/devtools/client/debugger/test/mochitest/browser_dbg_pretty-print-06.js
new file mode 100644
index 000000000..608df3140
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg_pretty-print-06.js
@@ -0,0 +1,80 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Make sure that prettifying JS sources with type errors works as expected.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_included-script.html";
+const JS_URL = EXAMPLE_URL + "code_location-changes.js";
+
+function test() {
+  let options = {
+    source: JS_URL,
+    line: 1
+  };
+  initDebugger(TAB_URL, options).then(([aTab,, aPanel]) => {
+    const gTab = aTab;
+    const gPanel = aPanel;
+    const gDebugger = gPanel.panelWin;
+    const gClient = gDebugger.gClient;
+    const gEditor = gDebugger.DebuggerView.editor;
+    const gSources = gDebugger.DebuggerView.Sources;
+    const queries = gDebugger.require("./content/queries");
+    const constants = gDebugger.require("./content/constants");
+    const actions = bindActionCreators(gPanel);
+    const getState = gDebugger.DebuggerController.getState;
+    let gPrettyPrinted = false;
+
+    // We can't feed javascript files with syntax errors to the debugger,
+    // because they will never run, thus sometimes getting gc'd before the
+    // debugger is opened, or even before the target finishes navigating.
+    // Make the client lie about being able to parse perfectly fine code.
+    gClient.request = (function (aOriginalRequestMethod) {
+      return function (aPacket, aCallback) {
+        if (aPacket.type == "prettyPrint") {
+          gPrettyPrinted = true;
+          return promise.reject({ error: "prettyPrintError" });
+        }
+        return aOriginalRequestMethod(aPacket, aCallback);
+      };
+    }(gClient.request));
+
+    Task.spawn(function* () {
+      // From this point onward, the source editor's text should never change.
+      gEditor.once("change", () => {
+        ok(false, "The source editor text shouldn't have changed.");
+      });
+
+      is(getSelectedSourceURL(gSources), JS_URL,
+        "The correct source is currently selected.");
+      ok(gEditor.getText().includes("myFunction"),
+        "The source shouldn't be pretty printed yet.");
+
+      const source = queries.getSelectedSource(getState());
+      try {
+        yield actions.togglePrettyPrint(source);
+        ok(false, "The promise for a prettified source should be rejected!");
+      } catch (error) {
+        ok(error.error, "Error came from a RDP request");
+        ok(error.error.includes("prettyPrintError"),
+          "The promise was correctly rejected with a meaningful message.");
+      }
+
+      const { text } = yield queries.getSourceText(getState(), source.actor);
+      is(getSelectedSourceURL(gSources), JS_URL,
+        "The correct source is still selected.");
+      ok(gEditor.getText().includes("myFunction"),
+        "The displayed source hasn't changed.");
+      ok(text.includes("myFunction"),
+        "The cached source text wasn't altered in any way.");
+
+      is(gPrettyPrinted, true,
+        "The hijacked pretty print method was executed.");
+
+      yield closeDebuggerAndFinish(gPanel);
+    });
+  });
+}