1 files changed, 39 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_graphs-09d.js b/devtools/client/shared/test/browser_graphs-09d.js
new file mode 100644
index 000000000..7d0c01c15
--- /dev/null
+++ b/devtools/client/shared/test/browser_graphs-09d.js
@@ -0,0 +1,39 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that line graphs hide the 'max' tooltip when the distance between
+// the 'min' and 'max' tooltip is too small.
+
+const TEST_DATA = [{ delta: 100, value: 60 }, { delta: 200, value: 59.9 }];
+const LineGraphWidget = require("devtools/client/shared/widgets/LineGraphWidget");
+
+add_task(function* () {
+  yield addTab("about:blank");
+  yield performTest();
+  gBrowser.removeCurrentTab();
+});
+
+function* performTest() {
+  let [host,, doc] = yield createHost();
+  let graph = new LineGraphWidget(doc.body, "fps");
+
+  yield testGraph(graph);
+
+  yield graph.destroy();
+  host.destroy();
+}
+
+function* testGraph(graph) {
+  yield graph.setDataWhenReady(TEST_DATA);
+
+  is(graph._gutter.hidden, false,
+    "The gutter should not be hidden.");
+  is(graph._maxTooltip.hidden, true,
+    "The max tooltip should be hidden.");
+  is(graph._avgTooltip.hidden, false,
+    "The avg tooltip should not be hidden.");
+  is(graph._minTooltip.hidden, false,
+    "The min tooltip should not be hidden.");
+}