diff -r 000000000000 -r 6474c204b198 toolkit/devtools/server/tests/unit/test_sourcemaps-07.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/devtools/server/tests/unit/test_sourcemaps-07.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that we don't permanently cache sources from source maps.
+ */
+
+var gDebuggee;
+var gClient;
+var gThreadClient;
+
+Components.utils.import("resource:///modules/devtools/SourceMap.jsm");
+
+function run_test()
+{
+  initTestDebuggerServer();
+  gDebuggee = addTestGlobal("test-source-map");
+  gClient = new DebuggerClient(DebuggerServer.connectPipe());
+  gClient.connect(function() {
+    attachTestTabAndResume(gClient, "test-source-map", function(aResponse, aTabClient, aThreadClient) {
+      gThreadClient = aThreadClient;
+      test_cached_original_sources();
+    });
+  });
+  do_test_pending();
+}
+
+function test_cached_original_sources()
+{
+  writeFile("temp.js", "initial content");
+
+  gClient.addOneTimeListener("newSource", onNewSource);
+
+  let node = new SourceNode(1, 0,
+                            getFileUrl("temp.js"),
+                            "function funcFromTemp() {}\n");
+  let { code, map } = node.toStringWithSourceMap({
+    file: "abc.js"
+  });
+  code += "//# sourceMappingURL=data:text/json;base64," + btoa(map.toString());
+
+
+  Components.utils.evalInSandbox(code, gDebuggee, "1.8",
+                                 "http://example.com/www/js/abc.js", 1);
+}
+
+function onNewSource(aEvent, aPacket) {
+  let sourceClient = gThreadClient.source(aPacket.source);
+  sourceClient.source(function (aResponse) {
+    do_check_true(!aResponse.error,
+                  "Should not be an error grabbing the source");
+    do_check_eq(aResponse.source, "initial content",
+                "The correct source content should be sent");
+
+    writeFile("temp.js", "new content");
+
+    sourceClient.source(function (aResponse) {
+      do_check_true(!aResponse.error,
+                    "Should not be an error grabbing the source");
+      do_check_eq(aResponse.source, "new content",
+                  "The correct source content should not be cached, so we should get the new content");
+
+      do_get_file("temp.js").remove(false);
+      finishClient(gClient);
+    });
+  });
+}