1 files changed, 37 insertions, 0 deletions
diff --git a/devtools/client/responsive/test/xpcshell/test_resize_viewport.js b/devtools/client/responsive/test/xpcshell/test_resize_viewport.js
new file mode 100644
index 0000000000..83780ad195
--- /dev/null
+++ b/devtools/client/responsive/test/xpcshell/test_resize_viewport.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test resizing the viewport.
+
+const {
+  addViewport,
+  resizeViewport,
+} = require("resource://devtools/client/responsive/actions/viewports.js");
+const {
+  toggleTouchSimulation,
+} = require("resource://devtools/client/responsive/actions/ui.js");
+
+add_task(async function () {
+  const store = Store();
+  const { getState, dispatch } = store;
+
+  dispatch(addViewport());
+  dispatch(resizeViewport(0, 500, 500));
+
+  let viewport = getState().viewports[0];
+  equal(viewport.width, 500, "Resized width of 500");
+  equal(viewport.height, 500, "Resized height of 500");
+
+  dispatch(toggleTouchSimulation(true));
+  dispatch(resizeViewport(0, 400, 400));
+
+  viewport = getState().viewports[0];
+  equal(viewport.width, 400, "Resized width of 400 (with touch simulation on)");
+  equal(
+    viewport.height,
+    400,
+    "Resized height of 400 (with touch simulation on)"
+  );
+});