캔버스 키보드 너지: 멀티선택 델타 적용 및 축별 스냅 보정, 수용 테스트 추가

components/wysiwyg/Canvas.nudge.multiselect.acceptance.test.tsx

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+import { describe, it, expect } from 'vitest'
+import { render, screen, fireEvent } from '@testing-library/react'
+import { WysiwygBuilderPage } from '@/components/wysiwyg/WysiwygBuilderPage'
+
+function getBoxes(ids: string[]) {
+  return ids.map((id) => {
+    const el = screen.getByTestId(`obj-${id}`) as HTMLElement
+    const s = el.style as CSSStyleDeclaration
+    return {
+      id,
+      left: parseInt(s.left || '0', 10),
+      top: parseInt(s.top || '0', 10),
+      width: parseInt(s.width || '0', 10),
+      height: parseInt(s.height || '0', 10),
+    }
+  })
+}
+
+function snap8(v: number) { return Math.round(v / 8) * 8 }
+
+async function addTextAt(x: number, y: number) {
+  fireEvent.click(screen.getByRole('button', { name: /^Add Text$/i }))
+  const all = await screen.findAllByTestId(/obj-text-/)
+  const obj = all[all.length - 1] as HTMLElement
+  // select the newly added object
+  fireEvent.mouseDown(obj, { clientX: x, clientY: y })
+  fireEvent.mouseUp(screen.getByTestId('wysiwyg-canvas'))
+  // move via props inputs (X/Y) for the selected object
+  const xInput = screen.getByLabelText('X') as HTMLInputElement
+  const yInput = screen.getByLabelText('Y') as HTMLInputElement
+  fireEvent.change(xInput, { target: { value: String(x) } })
+  fireEvent.change(yInput, { target: { value: String(y) } })
+  return obj.getAttribute('data-testid')!.replace('obj-', '')
+}
+
+describe('Canvas multiselect keyboard nudge', () => {
+  it('ArrowRight applies 1px then grid snap to both (no modifier)', async () => {
+    render(<WysiwygBuilderPage />)
+    const id1 = await addTextAt(60, 60)
+    const id2 = await addTextAt(140, 60)
+
+    const canvas = screen.getByTestId('wysiwyg-canvas')
+    // marquee select both
+    fireEvent.mouseDown(canvas, { clientX: 50, clientY: 50 })
+    fireEvent.mouseMove(canvas, { clientX: 240, clientY: 140 })
+    fireEvent.mouseUp(canvas)
+
+    const before = getBoxes([id1, id2])
+    fireEvent.keyDown(canvas, { key: 'ArrowRight' })
+    const after = getBoxes([id1, id2])
+    const expLeft0 = snap8(before[0].left + 1)
+    const dx = expLeft0 - before[0].left
+    after.forEach((b, i) => {
+      expect(b.left).toBe(before[i].left + dx)
+      expect(b.top).toBe(before[i].top)
+    })
+  })
+
+  it('Shift+ArrowUp moves exactly -1px on Y for both (no snap)', async () => {
+    render(<WysiwygBuilderPage />)
+    const id1 = await addTextAt(60, 60)
+    const id2 = await addTextAt(140, 60)
+
+    const canvas = screen.getByTestId('wysiwyg-canvas')
+    fireEvent.mouseDown(canvas, { clientX: 50, clientY: 50 })
+    fireEvent.mouseMove(canvas, { clientX: 240, clientY: 140 })
+    fireEvent.mouseUp(canvas)
+
+    const before = getBoxes([id1, id2])
+    fireEvent.keyDown(canvas, { key: 'ArrowUp', shiftKey: true })
+    const after = getBoxes([id1, id2])
+    after.forEach((b, i) => {
+      expect(b.top).toBe(before[i].top - 1)
+      expect(b.left).toBe(before[i].left)
+    })
+  })
+
+  it('Alt+ArrowRight moves +16px then snaps to grid for both', async () => {
+    render(<WysiwygBuilderPage />)
+    const id1 = await addTextAt(60, 60)
+    const id2 = await addTextAt(140, 60)
+
+    const canvas = screen.getByTestId('wysiwyg-canvas')
+    fireEvent.mouseDown(canvas, { clientX: 50, clientY: 50 })
+    fireEvent.mouseMove(canvas, { clientX: 240, clientY: 140 })
+    fireEvent.mouseUp(canvas)
+
+    const before = getBoxes([id1, id2])
+    fireEvent.keyDown(canvas, { key: 'ArrowRight', altKey: true })
+    const after = getBoxes([id1, id2])
+    const expLeft0 = snap8(before[0].left + 16)
+    const dx = expLeft0 - before[0].left
+    after.forEach((b, i) => {
+      expect(b.left).toBe(before[i].left + dx)
+      expect(b.top).toBe(before[i].top)
+    })
+  })
+})