diff -r 000000000000 -r 6474c204b198 browser/devtools/webconsole/test/browser_webconsole_bug_644419_log_limits.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webconsole/test/browser_webconsole_bug_644419_log_limits.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,219 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Tests that the Web Console limits the number of lines displayed according to
+// the limit set for each category.
+
+const TEST_URI = "http://example.com/browser/browser/devtools/" +
+                 "webconsole/test/test-bug-644419-log-limits.html";
+
+let hud, outputNode;
+
+function test() {
+  addTab("data:text/html;charset=utf-8,Web Console test for bug 644419: Console should " +
+         "have user-settable log limits for each message category");
+  browser.addEventListener("load", onLoad, true);
+}
+
+function onLoad(aEvent) {
+  browser.removeEventListener(aEvent.type, onLoad, true);
+
+  openConsole(null, function(aHud) {
+    aHud.jsterm.clearOutput();
+    hud = aHud;
+    outputNode = aHud.outputNode;
+
+    browser.addEventListener("load", testWebDevLimits, true);
+    expectUncaughtException();
+    content.location = TEST_URI;
+  });
+}
+
+function testWebDevLimits(aEvent) {
+  browser.removeEventListener(aEvent.type, testWebDevLimits, true);
+  Services.prefs.setIntPref("devtools.hud.loglimit.console", 10);
+
+  // Find the sentinel entry.
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "bar is not defined",
+      category: CATEGORY_JS,
+      severity: SEVERITY_ERROR,
+    }],
+  }).then(testWebDevLimits2);
+}
+
+function testWebDevLimits2() {
+  // Fill the log with Web Developer errors.
+  for (let i = 0; i < 11; i++) {
+    content.console.log("test message " + i);
+  }
+
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "test message 10",
+      category: CATEGORY_WEBDEV,
+      severity: SEVERITY_LOG,
+    }],
+  }).then(() => {
+    testLogEntry(outputNode, "test message 0", "first message is pruned", false, true);
+    findLogEntry("test message 1");
+    // Check if the sentinel entry is still there.
+    findLogEntry("bar is not defined");
+
+    Services.prefs.clearUserPref("devtools.hud.loglimit.console");
+    testJsLimits();
+  });
+}
+
+function testJsLimits() {
+  Services.prefs.setIntPref("devtools.hud.loglimit.exception", 10);
+
+  hud.jsterm.clearOutput();
+  content.console.log("testing JS limits");
+
+  // Find the sentinel entry.
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "testing JS limits",
+      category: CATEGORY_WEBDEV,
+      severity: SEVERITY_LOG,
+    }],
+  }).then(testJsLimits2);
+}
+
+function testJsLimits2() {
+  // Fill the log with JS errors.
+  let head = content.document.getElementsByTagName("head")[0];
+  for (let i = 0; i < 11; i++) {
+    var script = content.document.createElement("script");
+    script.text = "fubar" + i + ".bogus(6);";
+    expectUncaughtException();
+    head.insertBefore(script, head.firstChild);
+  }
+
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "fubar10 is not defined",
+      category: CATEGORY_JS,
+      severity: SEVERITY_ERROR,
+    }],
+  }).then(() => {
+    testLogEntry(outputNode, "fubar0 is not defined", "first message is pruned", false, true);
+    findLogEntry("fubar1 is not defined");
+    // Check if the sentinel entry is still there.
+    findLogEntry("testing JS limits");
+
+    Services.prefs.clearUserPref("devtools.hud.loglimit.exception");
+    testNetLimits();
+  });
+}
+
+var gCounter, gImage;
+
+function testNetLimits() {
+  Services.prefs.setIntPref("devtools.hud.loglimit.network", 10);
+
+  hud.jsterm.clearOutput();
+  content.console.log("testing Net limits");
+
+  // Find the sentinel entry.
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "testing Net limits",
+      category: CATEGORY_WEBDEV,
+      severity: SEVERITY_LOG,
+    }],
+  }).then(() => {
+    // Fill the log with network messages.
+    gCounter = 0;
+    loadImage();
+  });
+}
+
+function loadImage() {
+  if (gCounter < 11) {
+    let body = content.document.getElementsByTagName("body")[0];
+    gImage && gImage.removeEventListener("load", loadImage, true);
+    gImage = content.document.createElement("img");
+    gImage.src = "test-image.png?_fubar=" + gCounter;
+    body.insertBefore(gImage, body.firstChild);
+    gImage.addEventListener("load", loadImage, true);
+    gCounter++;
+    return;
+  }
+
+  is(gCounter, 11, "loaded 11 files");
+
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "test-image.png",
+      url: "test-image.png?_fubar=10",
+      category: CATEGORY_NETWORK,
+      severity: SEVERITY_LOG,
+    }],
+  }).then(() => {
+    let msgs = outputNode.querySelectorAll(".message[category=network]");
+    is(msgs.length, 10, "number of network messages");
+    isnot(msgs[0].url.indexOf("fubar=1"), -1, "first network message");
+    isnot(msgs[1].url.indexOf("fubar=2"), -1, "second network message");
+    findLogEntry("testing Net limits");
+
+    Services.prefs.clearUserPref("devtools.hud.loglimit.network");
+    testCssLimits();
+  });
+}
+
+function testCssLimits() {
+  Services.prefs.setIntPref("devtools.hud.loglimit.cssparser", 10);
+
+  hud.jsterm.clearOutput();
+  content.console.log("testing CSS limits");
+
+  // Find the sentinel entry.
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "testing CSS limits",
+      category: CATEGORY_WEBDEV,
+      severity: SEVERITY_LOG,
+    }],
+  }).then(testCssLimits2);
+}
+
+function testCssLimits2() {
+  // Fill the log with CSS errors.
+  let body = content.document.getElementsByTagName("body")[0];
+  for (let i = 0; i < 11; i++) {
+    var div = content.document.createElement("div");
+    div.setAttribute("style", "-moz-foobar" + i + ": 42;");
+    body.insertBefore(div, body.firstChild);
+  }
+
+  waitForMessages({
+    webconsole: hud,
+    messages: [{
+      text: "-moz-foobar10",
+      category: CATEGORY_CSS,
+      severity: SEVERITY_WARNING,
+    }],
+  }).then(() => {
+    testLogEntry(outputNode, "Unknown property '-moz-foobar0'",
+                 "first message is pruned", false, true);
+    findLogEntry("Unknown property '-moz-foobar1'");
+    // Check if the sentinel entry is still there.
+    findLogEntry("testing CSS limits");
+
+    Services.prefs.clearUserPref("devtools.hud.loglimit.cssparser");
+    finishTest();
+  });
+}