test: file-upload-nexus example (#1751)

Author: saihaj

examples/file-upload-nexus/__integration-tests__/file-upload-nexus.spec.ts

@@ -0,0 +1,74 @@
+import { yoga } from '../yoga'
+import { createServer, Server } from 'http'
+import { AddressInfo } from 'net'
+import { fetch, File, FormData } from '@whatwg-node/fetch'
+import * as fs from 'fs'
+import * as path from 'path'
+
+describe('file-upload-nexus example integration', () => {
+  let server: Server
+  let port: number
+
+  beforeAll(async () => {
+    server = createServer(yoga)
+    await new Promise<void>((resolve) => server.listen(0, resolve))
+    port = (server.address() as AddressInfo).port
+  })
+
+  afterAll(async () => {
+    await new Promise((resolve) => server.close(resolve))
+  })
+
+  it('should execute query', async () => {
+    const response = await fetch(
+      `http://localhost:${port}/graphql?query=query{greetings}`,
+    )
+    const body = await response.json()
+    expect(body.errors).toBeUndefined()
+    expect(body.data).toEqual({
+      greetings: 'Hello World!',
+    })
+  })
+
+  it('should read file text', async () => {
+    const sourceFilePath = path.join(
+      __dirname,
+      '..',
+      '..',
+      '..',
+      'website',
+      'public',
+      'logo.png',
+    )
+
+    const formData = new FormData()
+    formData.set(
+      'operations',
+      JSON.stringify({
+        query: /* GraphQL */ `
+          mutation readTextFile($file: File!) {
+            readTextFile(file: $file)
+          }
+        `,
+      }),
+    )
+    formData.set('map', JSON.stringify({ 0: ['variables.file'] }))
+    formData.set(
+      '0',
+      new File(
+        [await fs.promises.readFile(sourceFilePath)],
+        path.basename(sourceFilePath),
+        { type: 'image/png' },
+      ),
+    )
+
+    const response = await fetch(`http://localhost:${port}/graphql`, {
+      method: 'POST',
+      body: formData,
+    })
+
+    const body = await response.json()
+    expect(body.errors).toBeUndefined()
+    expect(body.data).toBeDefined()
+  })
+})

examples/file-upload-nexus/index.ts

@@ -1,42 +1,5 @@
-import {
-  makeSchema,
-  scalarType,
-  mutationField,
-  queryField,
-  arg,
-  nonNull,
-} from 'nexus'
-import { createYoga } from 'graphql-yoga'
 import { createServer } from 'http'
-
-const FileScalar = scalarType({
-  name: 'File',
-  asNexusMethod: 'file',
-  description: 'The `File` scalar type represents a file upload.',
-  sourceType: 'File',
-})
-
-const greetings = queryField('greetings', {
-  type: 'String',
-  resolve: () => 'Hello World!',
-})
-
-const readTextFile = mutationField('readTextFile', {
-  type: 'String',
-  args: { file: nonNull(arg({ type: 'File' })) },
-  resolve: async (parent, { file }) => {
-    const textContent = await file.text()
-    return textContent
-  },
-})
-
-const schema = makeSchema({
-  types: [FileScalar, greetings, readTextFile],
-})
-
-const yoga = createYoga({
-  schema,
-})
+import { yoga } from './yoga'
 
 const server = createServer(yoga)
 

examples/file-upload-nexus/yoga.ts

@@ -0,0 +1,38 @@
+import {
+  makeSchema,
+  scalarType,
+  mutationField,
+  queryField,
+  arg,
+  nonNull,
+} from 'nexus'
+import { createYoga } from 'graphql-yoga'
+
+const FileScalar = scalarType({
+  name: 'File',
+  asNexusMethod: 'file',
+  description: 'The `File` scalar type represents a file upload.',
+  sourceType: 'File',
+})
+
+const greetings = queryField('greetings', {
+  type: 'String',
+  resolve: () => 'Hello World!',
+})
+
+const readTextFile = mutationField('readTextFile', {
+  type: 'String',
+  args: { file: nonNull(arg({ type: 'File' })) },
+  resolve: async (parent, { file }) => {
+    const textContent = await file.text()
+    return textContent
+  },
+})
+
+const schema = makeSchema({
+  types: [FileScalar, greetings, readTextFile],
+})
+
+export const yoga = createYoga({
+  schema,
+})