1 files changed, 58 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_graphs-13.js b/devtools/client/shared/test/browser_graphs-13.js
new file mode 100644
index 0000000000..988880b334
--- /dev/null
+++ b/devtools/client/shared/test/browser_graphs-13.js
@@ -0,0 +1,58 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that graph widgets may have a fixed width or height.
+
+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();
+  doc.body.setAttribute(
+    "style",
+    "position: fixed; width: 100%; height: 100%; margin: 0;"
+  );
+
+  const graph = new LineGraphWidget(doc.body, "fps");
+  graph.fixedWidth = 200;
+  graph.fixedHeight = 100;
+
+  await graph.ready();
+  testGraph(host, graph);
+
+  await graph.destroy();
+  host.destroy();
+}
+
+function testGraph(host, graph) {
+  const bounds = host.frame.getBoundingClientRect();
+
+  isnot(
+    graph.width,
+    bounds.width * window.devicePixelRatio,
+    "The graph should not span all the parent node's width."
+  );
+  isnot(
+    graph.height,
+    bounds.height * window.devicePixelRatio,
+    "The graph should not span all the parent node's height."
+  );
+
+  is(
+    graph.width,
+    graph.fixedWidth * window.devicePixelRatio,
+    "The graph has the correct width."
+  );
+  is(
+    graph.height,
+    graph.fixedHeight * window.devicePixelRatio,
+    "The graph has the correct height."
+  );
+}