1 files changed, 107 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_graphs-09e.js b/devtools/client/shared/test/browser_graphs-09e.js
new file mode 100644
index 0000000000..1910ca0b82
--- /dev/null
+++ b/devtools/client/shared/test/browser_graphs-09e.js
@@ -0,0 +1,107 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that line graphs hide the gutter and tooltips when there's no data,
+// but show them when there is.
+
+const NO_DATA = [];
+const TEST_DATA = [
+  { delta: 112, value: 48 },
+  { delta: 213, value: 59 },
+  { delta: 313, value: 60 },
+  { delta: 413, value: 59 },
+  { delta: 530, value: 59 },
+  { delta: 646, value: 58 },
+  { delta: 747, value: 60 },
+  { delta: 863, value: 48 },
+  { delta: 980, value: 37 },
+  { delta: 1097, value: 30 },
+  { delta: 1213, value: 29 },
+  { delta: 1330, value: 23 },
+  { delta: 1430, value: 10 },
+  { delta: 1534, value: 17 },
+  { delta: 1645, value: 20 },
+  { delta: 1746, value: 22 },
+  { delta: 1846, value: 39 },
+  { delta: 1963, value: 26 },
+  { delta: 2080, value: 27 },
+  { delta: 2197, value: 35 },
+  { delta: 2312, value: 47 },
+  { delta: 2412, value: 53 },
+  { delta: 2514, value: 60 },
+  { delta: 2630, value: 37 },
+  { delta: 2730, value: 36 },
+  { delta: 2830, value: 37 },
+  { delta: 2946, value: 36 },
+  { delta: 3046, value: 40 },
+  { delta: 3163, value: 47 },
+  { delta: 3280, value: 41 },
+  { delta: 3380, value: 35 },
+  { delta: 3480, value: 27 },
+  { delta: 3580, value: 39 },
+  { delta: 3680, value: 42 },
+  { delta: 3780, value: 49 },
+  { delta: 3880, value: 55 },
+  { delta: 3980, value: 60 },
+  { delta: 4080, value: 60 },
+  { delta: 4180, value: 60 },
+];
+
+const LineGraphWidget = require("devtools/client/shared/widgets/LineGraphWidget");
+
+add_task(async function() {
+  await addTab("about:blank");
+  await performTest();
+  gBrowser.removeCurrentTab();
+});
+
+async function performTest() {
+  const { host, doc } = await createHost();
+  const graph = new LineGraphWidget(doc.body, "fps");
+
+  await testGraph(graph);
+
+  await graph.destroy();
+  host.destroy();
+}
+
+async function testGraph(graph) {
+  await graph.setDataWhenReady(NO_DATA);
+
+  is(
+    graph._gutter.hidden,
+    true,
+    "The gutter should be hidden when there's no data available."
+  );
+  is(
+    graph._maxTooltip.hidden,
+    true,
+    "The max tooltip should be hidden when there's no data available."
+  );
+  is(
+    graph._avgTooltip.hidden,
+    true,
+    "The avg tooltip should be hidden when there's no data available."
+  );
+  is(
+    graph._minTooltip.hidden,
+    true,
+    "The min tooltip should be hidden when there's no data available."
+  );
+
+  await graph.setDataWhenReady(TEST_DATA);
+
+  is(graph._gutter.hidden, false, "The gutter should be visible now.");
+  is(graph._maxTooltip.hidden, false, "The max tooltip should be visible now.");
+  is(graph._avgTooltip.hidden, false, "The avg tooltip should be visible now.");
+  is(graph._minTooltip.hidden, false, "The min tooltip should be visible now.");
+
+  await graph.setDataWhenReady(NO_DATA);
+
+  is(graph._gutter.hidden, true, "The gutter should be hidden again.");
+  is(graph._maxTooltip.hidden, true, "The max tooltip should be hidden again.");
+  is(graph._avgTooltip.hidden, true, "The avg tooltip should be hidden again.");
+  is(graph._minTooltip.hidden, true, "The min tooltip should be hidden again.");
+}