test: add browser tests for bring-node-to-front behavior

Verifies overlapping nodes come to front when:
- Clicking on the node body
- Clicking on a widget

Author: Myestery

browser_tests/tests/vueNodes/interactions/node/bringToFront.spec.ts

@@ -0,0 +1,136 @@
+import {
+  comfyExpect as expect,
+  comfyPageFixture as test
+} from '../../../../fixtures/ComfyPage'
+import { fitToViewInstant } from '../../../../helpers/fitToView'
+
+test.describe('Vue Node Bring to Front', () => {
+  test.beforeEach(async ({ comfyPage }) => {
+    await comfyPage.setSetting('Comfy.UseNewMenu', 'Disabled')
+    await comfyPage.setSetting('Comfy.VueNodes.Enabled', true)
+    await comfyPage.loadWorkflow('vueNodes/simple-triple')
+    await comfyPage.vueNodes.waitForNodes()
+    await fitToViewInstant(comfyPage)
+  })
+
+  /**
+   * Helper to get the z-index of a node by its title
+   */
+  async function getNodeZIndex(
+    comfyPage: Awaited<
+      ReturnType<(typeof test)['__dirtyFixtureLookup']>
+    >['comfyPage'],
+    title: string
+  ): Promise<number> {
+    const node = comfyPage.vueNodes.getNodeByTitle(title)
+    const style = await node.getAttribute('style')
+    const match = style?.match(/z-index:\s*(\d+)/)
+    return match ? parseInt(match[1], 10) : 0
+  }
+
+  /**
+   * Helper to get the bounding box center of a node
+   */
+  async function getNodeCenter(
+    comfyPage: Awaited<
+      ReturnType<(typeof test)['__dirtyFixtureLookup']>
+    >['comfyPage'],
+    title: string
+  ): Promise<{ x: number; y: number }> {
+    const node = comfyPage.vueNodes.getNodeByTitle(title)
+    const box = await node.boundingBox()
+    if (!box) throw new Error(`Node "${title}" not found`)
+    return { x: box.x + box.width / 2, y: box.y + box.height / 2 }
+  }
+
+  test('should bring overlapped node to front when clicking on it', async ({
+    comfyPage
+  }) => {
+    // Get initial positions
+    const clipCenter = await getNodeCenter(comfyPage, 'CLIP Text Encode')
+    const ksamplerHeader = await comfyPage.page
+      .getByText('KSampler')
+      .boundingBox()
+    if (!ksamplerHeader) throw new Error('KSampler header not found')
+
+    // Drag KSampler on top of CLIP Text Encode
+    await comfyPage.dragAndDrop(
+      { x: ksamplerHeader.x + 50, y: ksamplerHeader.y + 10 },
+      clipCenter
+    )
+    await comfyPage.nextFrame()
+
+    // Screenshot showing KSampler on top of CLIP
+    await expect(comfyPage.canvas).toHaveScreenshot(
+      'bring-to-front-overlapped-before.png'
+    )
+
+    // KSampler should be on top (higher z-index) after being dragged
+    const ksamplerZIndexBefore = await getNodeZIndex(comfyPage, 'KSampler')
+    const clipZIndexBefore = await getNodeZIndex(comfyPage, 'CLIP Text Encode')
+    expect(ksamplerZIndexBefore).toBeGreaterThan(clipZIndexBefore)
+
+    // Click on CLIP Text Encode (underneath) - need to click on a visible part
+    // Since KSampler is on top, we click on the edge of CLIP that should still be visible
+    const clipNode = comfyPage.vueNodes.getNodeByTitle('CLIP Text Encode')
+    const clipBox = await clipNode.boundingBox()
+    if (!clipBox) throw new Error('CLIP node not found')
+
+    // Click on the bottom-left corner of CLIP which should be visible
+    await comfyPage.page.mouse.click(clipBox.x + 30, clipBox.y + 10)
+    await comfyPage.nextFrame()
+
+    // CLIP should now be on top
+    const clipZIndexAfter = await getNodeZIndex(comfyPage, 'CLIP Text Encode')
+    expect(clipZIndexAfter).toBeGreaterThan(ksamplerZIndexBefore)
+
+    // Screenshot showing CLIP now on top
+    await expect(comfyPage.canvas).toHaveScreenshot(
+      'bring-to-front-overlapped-after.png'
+    )
+  })
+
+  test('should bring overlapped node to front when clicking on its widget', async ({
+    comfyPage
+  }) => {
+    // Get CLIP Text Encode position (it has a text widget)
+    const clipCenter = await getNodeCenter(comfyPage, 'CLIP Text Encode')
+
+    // Get VAE Decode position and drag it on top of CLIP
+    const vaeHeader = await comfyPage.page.getByText('VAE Decode').boundingBox()
+    if (!vaeHeader) throw new Error('VAE Decode header not found')
+
+    await comfyPage.dragAndDrop(
+      { x: vaeHeader.x + 50, y: vaeHeader.y + 10 },
+      { x: clipCenter.x - 50, y: clipCenter.y }
+    )
+    await comfyPage.nextFrame()
+
+    // VAE should be on top after drag
+    const vaeZIndexBefore = await getNodeZIndex(comfyPage, 'VAE Decode')
+    const clipZIndexBefore = await getNodeZIndex(comfyPage, 'CLIP Text Encode')
+    expect(vaeZIndexBefore).toBeGreaterThan(clipZIndexBefore)
+
+    // Screenshot showing VAE on top
+    await expect(comfyPage.canvas).toHaveScreenshot(
+      'bring-to-front-widget-overlapped-before.png'
+    )
+
+    // Click on the text widget of CLIP Text Encode
+    const clipNode = comfyPage.vueNodes.getNodeByTitle('CLIP Text Encode')
+    const clipBox = await clipNode.boundingBox()
+    const textWidget = clipNode.locator('textarea').first()
+    if (!clipBox) throw new Error('CLIP node not found')
+    await comfyPage.page.mouse.click(clipBox.x + 170, clipBox.y + 80)
+    await comfyPage.nextFrame()
+
+    // CLIP should now be on top
+    const clipZIndexAfter = await getNodeZIndex(comfyPage, 'CLIP Text Encode')
+    expect(clipZIndexAfter).toBeGreaterThan(vaeZIndexBefore)
+
+    // Screenshot showing CLIP now on top after widget click
+    await expect(comfyPage.canvas).toHaveScreenshot(
+      'bring-to-front-widget-overlapped-after.png'
+    )
+  })
+})