Add m-esr52 at 52.6.0

1 files changed, 22 insertions, 0 deletions

diff --git a/devtools/client/responsive.html/test/unit/test_change_pixel_ratio.js b/devtools/client/responsive.html/test/unit/test_change_pixel_ratio.js
new file mode 100644
index 000000000..b594caef5
--- /dev/null
+++ b/devtools/client/responsive.html/test/unit/test_change_pixel_ratio.js
@@ -0,0 +1,22 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test changing the viewport pixel ratio.
+
+const { addViewport, changePixelRatio } =
+  require("devtools/client/responsive.html/actions/viewports");
+const NEW_PIXEL_RATIO = 5.5;
+
+add_task(function* () {
+  let store = Store();
+  const { getState, dispatch } = store;
+
+  dispatch(addViewport());
+  dispatch(changePixelRatio(0, NEW_PIXEL_RATIO));
+
+  let viewport = getState().viewports[0];
+  equal(viewport.pixelRatio.value, NEW_PIXEL_RATIO,
+    `Viewport's pixel ratio changed to ${NEW_PIXEL_RATIO}`);
+});