#49 feat: componente genérico CytoscapeChart con evento select

tests/unit/components/graph/CytoscapeChart.spec.js

@@ -0,0 +1,94 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+import CytoscapeChart from '@/components/graph/CytoscapeChart.vue'
+
+const tapHandler = { current: null }
+const cy = {
+  on: vi.fn((event, selector, handler) => {
+    if (event === 'tap') tapHandler.current = handler
+  }),
+  elements: vi.fn(() => ({ remove: vi.fn() })),
+  add: vi.fn(),
+  layout: vi.fn(() => ({ run: vi.fn() })),
+  destroy: vi.fn(),
+}
+
+vi.mock('cytoscape', () => ({
+  default: vi.fn(() => cy),
+}))
+
+import cytoscape from 'cytoscape'
+
+const elements = [
+  { data: { id: 'product:1', kind: 'product', label: 'Panela' }, position: { x: 100, y: 100 } },
+  { data: { id: 'supplier:5', kind: 'supplier', label: 'La Mesa' }, position: { x: 320, y: 100 } },
+  { data: { id: 'e1', source: 'product:1', target: 'supplier:5' } },
+]
+
+const styles = [{ selector: 'node', style: { 'background-color': '#eee' } }]
+
+beforeEach(() => {
+  vi.clearAllMocks()
+  tapHandler.current = null
+})
+
+function mountChart (props = {}) {
+  return mount(CytoscapeChart, {
+    props: { elements, styles, ...props },
+  })
+}
+
+describe('CytoscapeChart', () => {
+  it('crea la instancia de cytoscape con elements, styles y layout', () => {
+    mountChart()
+
+    expect(cytoscape).toHaveBeenCalledTimes(1)
+    expect(cytoscape).toHaveBeenCalledWith(
+      expect.objectContaining({
+        elements,
+        style: styles,
+        layout: { name: 'preset' },
+      })
+    )
+  })
+
+  it('permite sobreescribir el layout con el prop layout', () => {
+    mountChart({ layout: { name: 'breadthfirst' } })
+
+    expect(cytoscape).toHaveBeenCalledWith(
+      expect.objectContaining({ layout: { name: 'breadthfirst' } })
+    )
+  })
+
+  it('emite select con los datos del nodo al hacer tap', () => {
+    const wrapper = mountChart()
+
+    tapHandler.current({ target: { data: () => elements[0].data } })
+
+    expect(wrapper.emitted('select')).toEqual([[elements[0].data]])
+  })
+
+  it('actualiza la instancia cuando cambian los elements', async () => {
+    const wrapper = mountChart()
+    const next = [{ data: { id: 'organization:3', kind: 'organization', label: 'Red' } }]
+
+    await wrapper.setProps({ elements: next })
+
+    expect(cy.elements).toHaveBeenCalled()
+    expect(cy.add).toHaveBeenCalledWith(next)
+    expect(cy.layout).toHaveBeenCalled()
+  })
+
+  it('destruye la instancia al desmontarse', () => {
+    const wrapper = mountChart()
+
+    wrapper.unmount()
+
+    expect(cy.destroy).toHaveBeenCalledTimes(1)
+  })
+
+  it('no escucha eventos mientras no exista la instancia', () => {
+    mountChart()
+    expect(cy.on).toHaveBeenCalledWith('tap', 'node', expect.any(Function))
+  })
+})