Fix middleware and integration test for it

Fix #404 #403

docker-compose.yml

@@ -15,9 +15,16 @@ services:
       dockerfile: ./example/webpack/Dockerfile
     stdin_open: true
     tty: true
+  serve-express-example:
+    build:
+      context: .
+      dockerfile: ./example/express-server/Dockerfile
+    stdin_open: true
+    tty: true
   test:
     depends_on:
       - serve-webpack-example
+      - serve-express-example
     build:
       context: .
       dockerfile: ./tests/Dockerfile
@@ -29,6 +36,9 @@ services:
       - ./playwright-report:/app/playwright-report
     command: npx playwright test
   update-snapshots:
+    depends_on:
+      - serve-webpack-example
+      - serve-express-example
     build:
       context: .
       dockerfile: ./tests/Dockerfile

example/express-server/Dockerfile

@@ -0,0 +1,16 @@
+# syntax=docker/dockerfile:1
+
+FROM node:20
+
+WORKDIR /app
+
+COPY ./graphql-voyager-*.tgz graphql-voyager.tgz
+
+COPY ./example/express-server ./example/express-server
+
+WORKDIR example/express-server
+RUN npm install
+RUN npm test
+
+EXPOSE  9090
+CMD npm start

example/express-server/index.ts

@@ -0,0 +1,23 @@
+import * as express from 'express';
+import { createHandler } from 'graphql-http/lib/use/express';
+import { express as voyagerMiddleware } from 'graphql-voyager/middleware';
+
+import { schema } from './schema';
+
+const PORT = 9090;
+const app = express();
+
+app.use('/graphql', createHandler({ schema }));
+app.use(
+  '/voyager',
+  voyagerMiddleware({
+    endpointUrl: '/graphql',
+    displayOptions: {
+      sortByAlphabet: true,
+    },
+  }),
+);
+
+app.listen(PORT, () => {
+  console.log(`Started on http://localhost:${PORT}/voyager`);
+});

example/express-server/package.json

@@ -0,0 +1,19 @@
+{
+  "private": "true",
+  "description": "An example using GraphQL-Voyager",
+  "scripts": {
+    "start": "ts-node index.ts",
+    "test": "tsc"
+  },
+  "dependencies": {
+    "express": "4.16.3",
+    "graphql": "16.5.0",
+    "graphql-http": "1.22.1",
+    "graphql-voyager": "../../graphql-voyager.tgz"
+  },
+  "devDependencies": {
+    "@types/express": "4.17.21",
+    "ts-node": "10.9.2",
+    "typescript": "4.9.5"
+  }
+}

example/express-server/schema.ts

@@ -0,0 +1,103 @@
+import { buildSchema } from 'graphql';
+
+export const schema = buildSchema(`
+  enum TestEnum {
+    "A rosy color"
+    RED
+    "The color of martians and slime"
+    GREEN
+    "A feeling you might have if you can't use GraphQL"
+    BLUE
+  }
+
+  input TestInput {
+    string: String
+    int: Int
+    float: Float
+    boolean: Boolean
+    id: ID
+    enum: TestEnum
+    object: TestInput
+
+    # List
+    listString: [String]
+    listInt: [Int]
+    listFloat: [Float]
+    listBoolean: [Boolean]
+    listID: [ID]
+    listEnum: [TestEnum]
+    listObject: [TestInput]
+  }
+
+  "The interface"
+  interface TestInterface {
+    "Common name string."
+    name: String
+  }
+
+  type First implements TestInterface {
+    "Common name string for First."
+    name: String
+
+    first: [TestInterface]
+  }
+
+  type Second implements TestInterface {
+    "Common name string for Second."
+    name: String
+    second: [TestInterface]
+  }
+
+  union TestUnion = First | Second
+
+  type Test {
+    "\`test\` field from \`Test\` type."
+    test: Test
+
+    "> union field from Test type, block-quoted."
+    union: TestUnion
+
+    "id field from Test type."
+    id: ID
+
+    "Is this a test schema? Sure it is."
+    isTest: Boolean
+
+    hasArgs(
+      string: String
+      int: Int
+      float: Float
+      boolean: Boolean
+      id: ID
+      enum: TestEnum
+      object: TestInput
+
+      # List
+      listString: [String]
+      listInt: [Int]
+      listFloat: [Float]
+      listBoolean: [Boolean]
+      listID: [ID]
+      listEnum: [TestEnum]
+      listObject: [TestInput]
+    ): String
+  }
+
+  "This is a simple mutation type"
+  type MutationType {
+    "Set the string field"
+    setString(value: String): String
+  }
+
+  "This is a simple subscription type"
+  type SubscriptionType {
+    "Subscribe to the test type"
+    subscribeToTest(id: String): Test
+  }
+
+  schema {
+    query: Test
+    mutation: MutationType
+    subscription: SubscriptionType
+  }
+`);

example/express-server/tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "noEmit": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "target": "es2021"
+  },
+  "include": ["./index.ts"],
+  "ts-node": {
+    "compilerOptions": {
+      "module": "CommonJS"
+    }
+  }
+}