add plant uml generator performance test

test/commands/PlantUMLComponentDiagramPerformance.test.ts

@@ -0,0 +1,40 @@
+import { afterEach, beforeAll, describe, expect, test } from 'vitest'
+import path from 'node:path'
+import fs from 'node:fs'
+import { createContextMapperDslServices } from '../../src/language/ContextMapperDslModule.js'
+import { NodeFileSystem } from 'langium/node'
+import { clearDocuments } from 'langium/test'
+import { ExecuteCommandHandler } from 'langium/lsp'
+
+const outDir = path.join(__dirname, 'out')
+
+let services: ReturnType<typeof createContextMapperDslServices>
+let commandHandler: ExecuteCommandHandler
+
+beforeAll(() => {
+  services = createContextMapperDslServices(NodeFileSystem)
+  commandHandler = services.shared.lsp.ExecuteCommandHandler!
+})
+
+afterEach(async () => {
+  await clearDocuments(services.shared, services.shared.workspace.LangiumDocuments.all.toArray())
+  fs.rmSync(outDir, {
+    recursive: true,
+    force: true
+  })
+})
+
+describe('PlantUML component diagram generation - performance test', () => {
+  test('test PlantUML generation performance for stage 3 DDD-Sample', async () => {
+    const file = path.join(__dirname, '..', 'example-files', 'DDD-Sample-Stage-3.cml')
+
+    const startTime = Date.now()
+    const result = await commandHandler.executeCommand('org.contextmapper.GeneratePlantUML', [file, outDir])
+    const endTime = Date.now()
+
+    expect(result).toHaveLength(1)
+    const outContent = fs.readdirSync(outDir)
+    expect(outContent).toHaveLength(1)
+    expect(endTime - startTime).toBeLessThanOrEqual(500)
+  })
+})