add all of tests

test/all.of.spec.ts

@@ -0,0 +1,58 @@
+import * as path from 'path';
+import * as express from 'express';
+import { expect } from 'chai';
+import * as request from 'supertest';
+import { createApp } from './common/app';
+import * as packageJson from '../package.json';
+
+describe(packageJson.name, () => {
+  let app = null;
+
+  before(async () => {
+    // Set up the express app
+    const apiSpec = path.join('test', 'resources', 'all.of.yaml');
+    app = await createApp({ apiSpec }, 3005, app =>
+      app.use(
+        `${app.basePath}`,
+        express.Router().post(`/all_of`, (req, res) => res.json(req.body)),
+      ),
+    );
+  });
+
+  after(() => {
+    app.server.close();
+  });
+
+  it('should validate allOf', async () =>
+    request(app)
+      .post(`${app.basePath}/all_of`)
+      .send({
+        id: 1,
+        name: 'jim',
+      })
+      .expect(200));
+
+  it('should fail validation due to missing required id field', async () =>
+    request(app)
+      .post(`${app.basePath}/all_of`)
+      .send({
+        name: 1,
+      })
+      .expect(400)
+      .then(r => {
+        const e = r.body;
+        expect(e.message).to.contain("required property 'id'");
+      }));
+
+  it('should fail validation due to missing required name field', async () =>
+    request(app)
+      .post(`${app.basePath}/all_of`)
+      .send({
+        id: 1,
+      })
+      .expect(400)
+      .then(r => {
+        const e = r.body;
+        expect(e.message).to.contain("required property 'name'");
+      }));
+});

test/resources/all.of.yaml

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+openapi: "3.0.0"
+info:
+  version: 1.0.0
+  title: Test
+
+servers:
+  - url: /v1
+paths:
+  /all_of:
+    post:
+      requestBody:
+        description: body
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+
+      responses:
+        "200":
+          description: success
+
+components:
+  schemas:
+    NewPet:
+      # The following causes AJV validation to fail - https://github.com/epoberezkin/ajv/issues/837
+      # additionalProperties: false
+      required:
+        - name
+      properties:
+        name:
+          type: string
+          nullable: true
+        tag:
+          type: string
+
+    Pet:
+      # This causes AVJ validation to fail - https://github.com/epoberezkin/ajv/issues/837
+      # additionalProperties: false
+      allOf:
+        - $ref: "#/components/schemas/NewPet"
+        - required:
+            - id
+          properties:
+            id:
+              type: integer
+              format: int64