diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_location-changes-04-breakpoint.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_location-changes-04-breakpoint.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,200 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Make sure that reloading a page with a breakpoint set does not cause it to
+ * fire more than once.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_included-script.html";
+const SOURCE_URL = EXAMPLE_URL + "code_location-changes.js";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+let gEditor, gSources;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gEditor = gDebugger.DebuggerView.editor;
+    gSources = gDebugger.DebuggerView.Sources;
+
+    waitForSourceAndCaretAndScopes(gPanel, ".html", 17).then(addBreakpoint);
+    gDebuggee.runDebuggerStatement();
+  });
+}
+
+function addBreakpoint() {
+  waitForSourceAndCaret(gPanel, ".js", 5).then(() => {
+    ok(true,
+      "Switched to the desired function when adding a breakpoint " +
+      "but not passing { noEditorUpdate: true } as an option.");
+
+    testResume();
+  });
+
+  gPanel.addBreakpoint({ url: SOURCE_URL, line: 5 });
+}
+
+function testResume() {
+  is(gDebugger.gThreadClient.state, "paused",
+    "The breakpoint wasn't hit yet (1).");
+  is(gSources.selectedValue, SOURCE_URL,
+    "The currently shown source is incorrect (1).");
+  ok(isCaretPos(gPanel, 5),
+    "The source editor caret position is incorrect (1).");
+
+  gDebugger.gThreadClient.resume(testClick);
+}
+
+function testClick() {
+  isnot(gDebugger.gThreadClient.state, "paused",
+    "The breakpoint wasn't hit yet (2).");
+  is(gSources.selectedValue, SOURCE_URL,
+    "The currently shown source is incorrect (2).");
+  ok(isCaretPos(gPanel, 5),
+    "The source editor caret position is incorrect (2).");
+
+  gDebugger.gThreadClient.addOneTimeListener("paused", (aEvent, aPacket) => {
+    is(aPacket.why.type, "breakpoint",
+      "Execution has advanced to the breakpoint.");
+    isnot(aPacket.why.type, "debuggerStatement",
+      "The breakpoint was hit before the debugger statement.");
+
+    ensureCaretAt(gPanel, 5, 1, true).then(afterBreakpointHit);
+  });
+
+  EventUtils.sendMouseEvent({ type: "click" },
+    gDebuggee.document.querySelector("button"),
+    gDebuggee);
+}
+
+function afterBreakpointHit() {
+  is(gDebugger.gThreadClient.state, "paused",
+    "The breakpoint was hit (3).");
+  is(gSources.selectedValue, SOURCE_URL,
+    "The currently shown source is incorrect (3).");
+  ok(isCaretPos(gPanel, 5),
+    "The source editor caret position is incorrect (3).");
+
+  gDebugger.gThreadClient.addOneTimeListener("paused", (aEvent, aPacket) => {
+    is(aPacket.why.type, "debuggerStatement",
+      "Execution has advanced to the next line.");
+    isnot(aPacket.why.type, "breakpoint",
+      "No ghost breakpoint was hit.");
+
+    ensureCaretAt(gPanel, 6, 1, true).then(afterDebuggerStatementHit);
+  });
+
+  gDebugger.gThreadClient.resume();
+}
+
+function afterDebuggerStatementHit() {
+  is(gDebugger.gThreadClient.state, "paused",
+    "The debugger statement was hit (4).");
+  is(gSources.selectedValue, SOURCE_URL,
+    "The currently shown source is incorrect (4).");
+  ok(isCaretPos(gPanel, 6),
+    "The source editor caret position is incorrect (4).");
+
+  promise.all([
+    waitForDebuggerEvents(gPanel, gDebugger.EVENTS.NEW_SOURCE),
+    waitForDebuggerEvents(gPanel, gDebugger.EVENTS.SOURCES_ADDED),
+    waitForDebuggerEvents(gPanel, gDebugger.EVENTS.SOURCE_SHOWN),
+    reloadActiveTab(gPanel, gDebugger.EVENTS.BREAKPOINT_SHOWN)
+  ]).then(testClickAgain);
+}
+
+function testClickAgain() {
+  isnot(gDebugger.gThreadClient.state, "paused",
+    "The breakpoint wasn't hit yet (5).");
+  is(gSources.selectedValue, SOURCE_URL,
+    "The currently shown source is incorrect (5).");
+  ok(isCaretPos(gPanel, 1),
+    "The source editor caret position is incorrect (5).");
+
+  gDebugger.gThreadClient.addOneTimeListener("paused", (aEvent, aPacket) => {
+    is(aPacket.why.type, "breakpoint",
+      "Execution has advanced to the breakpoint.");
+    isnot(aPacket.why.type, "debuggerStatement",
+      "The breakpoint was hit before the debugger statement.");
+
+    ensureCaretAt(gPanel, 5, 1, true).then(afterBreakpointHitAgain);
+  });
+
+  EventUtils.sendMouseEvent({ type: "click" },
+    gDebuggee.document.querySelector("button"),
+    gDebuggee);
+}
+
+function afterBreakpointHitAgain() {
+  is(gDebugger.gThreadClient.state, "paused",
+    "The breakpoint was hit (6).");
+  is(gSources.selectedValue, SOURCE_URL,
+    "The currently shown source is incorrect (6).");
+  ok(isCaretPos(gPanel, 5),
+    "The source editor caret position is incorrect (6).");
+
+  gDebugger.gThreadClient.addOneTimeListener("paused", (aEvent, aPacket) => {
+    is(aPacket.why.type, "debuggerStatement",
+      "Execution has advanced to the next line.");
+    isnot(aPacket.why.type, "breakpoint",
+      "No ghost breakpoint was hit.");
+
+    ensureCaretAt(gPanel, 6, 1, true).then(afterDebuggerStatementHitAgain);
+  });
+
+  gDebugger.gThreadClient.resume();
+}
+
+function afterDebuggerStatementHitAgain() {
+  is(gDebugger.gThreadClient.state, "paused",
+    "The debugger statement was hit (7).");
+  is(gSources.selectedValue, SOURCE_URL,
+    "The currently shown source is incorrect (7).");
+  ok(isCaretPos(gPanel, 6),
+    "The source editor caret position is incorrect (7).");
+
+  showSecondSource();
+}
+
+function showSecondSource() {
+  gDebugger.once(gDebugger.EVENTS.SOURCE_SHOWN, () => {
+    is(gEditor.getText().indexOf("debugger"), 447,
+      "The correct source is shown in the source editor.")
+    is(gEditor.getBreakpoints().length, 0,
+      "No breakpoints should be shown for the second source.");
+
+    ensureCaretAt(gPanel, 1, 1, true).then(showFirstSourceAgain);
+  });
+
+  EventUtils.sendMouseEvent({ type: "mousedown" },
+    gDebugger.document.querySelectorAll(".side-menu-widget-item-contents")[1],
+    gDebugger);
+}
+
+function showFirstSourceAgain() {
+  gDebugger.once(gDebugger.EVENTS.SOURCE_SHOWN, () => {
+    is(gEditor.getText().indexOf("debugger"), 148,
+      "The correct source is shown in the source editor.")
+    is(gEditor.getBreakpoints().length, 1,
+      "One breakpoint should be shown for the first source.");
+
+    ensureCaretAt(gPanel, 6, 1, true).then(() => resumeDebuggerThenCloseAndFinish(gPanel));
+  });
+
+  EventUtils.sendMouseEvent({ type: "mousedown" },
+    gDebugger.document.querySelectorAll(".side-menu-widget-item-contents")[0],
+    gDebugger);
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gEditor = null;
+  gSources = null;
+});