diff --git a/src/tests/flows/userResize.ts b/src/tests/flows/userResize.ts
new file mode 100644
index 0000000..8e1dd2e
--- /dev/null
+++ b/src/tests/flows/userResize.ts
@@ -0,0 +1,72 @@
+tests.register("User resize", 1, () => {
+    const config = getDefaultConfig();
+    config.resizeNeighborColumn = true;
+
+    const h = getWindowHeight(2);
+    let clientLeft: MockKwinClient, clientRightTop: MockKwinClient, clientRightBottom: MockKwinClient;
+    function assertSizes(leftWidth: number, rightWidth: number, topHeight: number, bottomHeight: number) {
+        const { left, right } = getGridBounds(clientLeft, clientRightTop);
+        Assert.rect(clientLeft.frameGeometry, left, tilingArea.top, leftWidth, tilingArea.height);
+        Assert.rect(clientRightTop.frameGeometry, left+leftWidth+gapH, tilingArea.top, rightWidth, topHeight);
+        Assert.rect(clientRightBottom.frameGeometry, left+leftWidth+gapH, tilingArea.top+topHeight+gapV, rightWidth, bottomHeight);
+    }
+
+    {
+        const { qtMock, workspaceMock, world } = init(config);
+        [clientLeft, clientRightTop, clientRightBottom] = workspaceMock.createClientsWithWidths(300, 300, 200);
+        qtMock.fireShortcut("karousel-window-move-left");
+        assertSizes(300, 300, h, h);
+
+        workspaceMock.resizeWindow(clientLeft, 10, 20, false, false, false);
+        assertSizes(310, 300, h, h);
+
+        workspaceMock.resizeWindow(clientRightTop, -10, -20, false, false, false);
+        assertSizes(310, 290, h-20, h+20);
+
+        workspaceMock.resizeWindow(clientRightBottom, -10, 20, false, false, false);
+        assertSizes(310, 280, h-20, h+20);
+
+        workspaceMock.resizeWindow(clientRightBottom, 0, 20, false, true, false);
+        assertSizes(310, 280, h-40, h+40);
+    }
+
+    {
+        const { qtMock, workspaceMock, world } = init(config);
+        [clientLeft, clientRightTop, clientRightBottom] = workspaceMock.createClientsWithWidths(300, 300, 200);
+        qtMock.fireShortcut("karousel-window-move-left");
+        assertSizes(300, 300, h, h);
+
+        workspaceMock.resizeWindow(clientLeft, 10, 20, false, false, true);
+        assertSizes(310, 290, h, h);
+
+        workspaceMock.resizeWindow(clientRightTop, -10, -20, false, false, true);
+        assertSizes(310, 280, h-20, h+20);
+
+        workspaceMock.resizeWindow(clientRightBottom, -10, 20, true, false, true);
+        assertSizes(320, 270, h-20, h+20);
+
+        workspaceMock.resizeWindow(clientRightBottom, 0, 20, false, true, true);
+        assertSizes(320, 270, h-40, h+40);
+    }
+
+    {
+        const { qtMock, workspaceMock, world } = init(config);
+        [clientLeft, clientRightTop, clientRightBottom] = workspaceMock.createClientsWithWidths(300, 300, 200);
+        clientRightBottom.minSize = new MockQmlSize(295, h-20);
+        qtMock.fireShortcut("karousel-window-move-left");
+        assertSizes(300, 300, h, h);
+
+        workspaceMock.resizeWindow(clientLeft, 10, 20, false, false, true);
+        assertSizes(310, 295, h, h);
+
+        workspaceMock.resizeWindow(clientRightTop, -10, -20, false, false, true);
+        assertSizes(310, 295, h-20, h+20);
+
+        workspaceMock.resizeWindow(clientRightBottom, -10, 20, true, false, true);
+        assertSizes(320, 295, h-20, h+20);
+
+        // TODO
+        // workspaceMock.resizeWindow(clientRightBottom, 0, -80, false, true, true);
+        // assertSizes(320, 295, h+60, h-20);
+    }
+});
diff --git a/src/tests/utils/global.ts b/src/tests/utils/global.ts
index e0c9e24..f12efa7 100644
--- a/src/tests/utils/global.ts
+++ b/src/tests/utils/global.ts
@@ -32,3 +32,15 @@ function init(config: Config) {
     const world = new World(config);
     return { qtMock, workspaceMock, world };
 }
+
+function getGridBounds(clientLeft: KwinClient, clientRight: KwinClient) {
+    const columnsWidth = clientRight.frameGeometry.right - clientLeft.frameGeometry.left;
+    const left = Math.floor((screen.width - columnsWidth) / 2);
+    const right = left + columnsWidth;
+    return { left, right };
+}
+
+function getWindowHeight(windowsInColumn: number) {
+    const totalGaps = (windowsInColumn-1) * gapV;
+    return Math.round((tilingArea.height - totalGaps) / windowsInColumn);
+}
diff --git a/src/tests/utils/mocks/MockKwinClient.ts b/src/tests/utils/mocks/MockKwinClient.ts
index d6864e7..1545f0e 100644
--- a/src/tests/utils/mocks/MockKwinClient.ts
+++ b/src/tests/utils/mocks/MockKwinClient.ts
@@ -8,7 +8,7 @@ class MockKwinClient {
     public minSize: Readonly<QmlSize> = new MockQmlSize(0, 0);
     public readonly transient: boolean;
     public readonly move: boolean = false;
-    public readonly resize: boolean = false;
+    public resize: boolean = false;
     public readonly moveable: boolean = true;
     public readonly resizeable: boolean = true;
     public readonly fullScreenable: boolean = true;
@@ -185,4 +185,8 @@ class MockKwinClient {
     public unpin() {
         this.tile = null;
     }
+
+    public getFrameGeometryCopy() {
+        return this._frameGeometry.clone();
+    }
 }
diff --git a/src/tests/utils/mocks/MockWorkspace.ts b/src/tests/utils/mocks/MockWorkspace.ts
index db7322d..edd45ab 100644
--- a/src/tests/utils/mocks/MockWorkspace.ts
+++ b/src/tests/utils/mocks/MockWorkspace.ts
@@ -49,6 +49,40 @@ class MockWorkspace {
         return this.createClientsWithFrames(...widths.map(width => new MockQmlRect(randomInt(100), randomInt(100), width, 100+randomInt(400))));
     }
 
+    public resizeWindow(window: MockKwinClient, widthDelta: number, heightDelta: number, leftEdge: boolean, topEdge: boolean, edgeResize: boolean) {
+        const frame = window.getFrameGeometryCopy();
+        if (edgeResize) {
+            this.cursorPos = new MockQmlPoint(
+                leftEdge ? frame.left : frame.right,
+                topEdge ? frame.top : frame.bottom,
+            );
+        } else {
+            this.cursorPos = new MockQmlPoint(
+                Math.round(frame.x + frame.width/2),
+                Math.round(frame.y + frame.height/2),
+            );
+        }
+        window.resize = true;
+        window.interactiveMoveResizeStarted.fire();
+
+        if (widthDelta !== 0) {
+            frame.width += widthDelta;
+            if (leftEdge) {
+                frame.x -= widthDelta;
+            }
+        }
+        if (heightDelta !== 0) {
+            frame.height += heightDelta;
+            if (topEdge) {
+                frame.y -= heightDelta;
+            }
+        }
+        window.frameGeometry = frame;
+
+        window.resize = false;
+        window.interactiveMoveResizeFinished.fire();
+    }
+
     public get activeWindow() {
         return this._activeWindow;
     }