tests: add external resize test

src/tests/flows/externalResize.ts

@@ -0,0 +1,33 @@
+tests.register("External resize", 1, () => {
+    const config = getDefaultConfig();
+    const { qtMock, workspaceMock, world } = init(config);
+
+    function getClientDesiredFrame(width: number) {
+        return new MockQmlRect(10, 10, width, 200);
+    }
+
+    function getTiledFrame(width: number) {
+        return new MockQmlRect(
+            Math.round((screen.width - width) / 2),
+            tilingArea.top,
+            width,
+            tilingArea.height,
+        );
+    }
+
+    const client = new MockKwinClient(
+        1,
+        "app1",
+        "Application 1",
+        getClientDesiredFrame(100),
+    );
+
+    workspaceMock.createWindow(client);
+    Assert.equalRects(client.frameGeometry, getTiledFrame(100), { message: "We should tile the window, respecting its desired width" });
+
+    client.frameGeometry = getClientDesiredFrame(110);
+    Assert.equalRects(client.frameGeometry, getTiledFrame(110), { message: "We should re-arrange the window, respecting its new desired width" });
+
+    client.frameGeometry = getClientDesiredFrame(120);
+    Assert.equalRects(client.frameGeometry, getClientDesiredFrame(120), { message: "We should give up and let the client have its desired frame" });
+});