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configuration.test.ts
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configuration.test.ts
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import gql from 'graphql-tag';
import http from 'http';
import mockedEnv from 'mocked-env';
import { Logger } from 'apollo-server-types';
import { ApolloGateway } from '../..';
import {
mockSdlQuerySuccess,
mockSupergraphSdlRequestSuccess,
mockApolloConfig,
mockCloudConfigUrl,
} from './nockMocks';
import { getTestingSupergraphSdl } from '../execution-utils';
import { MockService } from './networkRequests.test';
let logger: Logger;
const service: MockService = {
name: 'accounts',
url: 'http://localhost:4001',
typeDefs: gql`
extend type Query {
me: User
everyone: [User]
}
"This is my User"
type User @key(fields: "id") {
id: ID!
name: String
username: String
}
`,
};
beforeEach(() => {
const warn = jest.fn();
const debug = jest.fn();
const error = jest.fn();
const info = jest.fn();
logger = {
warn,
debug,
error,
info,
};
});
describe('gateway configuration warnings', () => {
let gateway: ApolloGateway | null = null;
afterEach(async () => {
if (gateway) {
await gateway.stop();
gateway = null;
}
});
it('warns when both supergraphSdl and studio configuration are provided', async () => {
gateway = new ApolloGateway({
supergraphSdl: getTestingSupergraphSdl(),
logger,
});
await gateway.load(mockApolloConfig);
expect(logger.warn).toHaveBeenCalledWith(
'A local gateway configuration is overriding a managed federation configuration.' +
' To use the managed configuration, do not specify a service list or supergraphSdl locally.',
);
});
it('warns when both manual update configurations are provided', async () => {
gateway = new ApolloGateway({
// @ts-ignore
async experimental_updateSupergraphSdl() {},
async experimental_updateServiceDefinitions() {},
logger,
});
expect(logger.warn).toHaveBeenCalledWith(
'Gateway found two manual update configurations when only one should be ' +
'provided. Gateway will default to using the provided `experimental_updateSupergraphSdl` ' +
'function when both `experimental_updateSupergraphSdl` and experimental_updateServiceDefinitions` ' +
'are provided.',
);
// Set to `null` so we don't try to call `stop` on it in the `afterEach`,
// which triggers a different error that we're not testing for here.
gateway = null;
});
it('conflicting configurations are warned about when present', async () => {
mockSdlQuerySuccess(service);
gateway = new ApolloGateway({
serviceList: [{ name: 'accounts', url: service.url }],
logger,
});
await gateway.load(mockApolloConfig);
expect(logger.warn).toHaveBeenCalledWith(
expect.stringMatching(
/A local gateway configuration is overriding a managed federation configuration/,
),
);
});
it('conflicting configurations are not warned about when absent', async () => {
mockSupergraphSdlRequestSuccess();
gateway = new ApolloGateway({
logger,
schemaConfigDeliveryEndpoint: mockCloudConfigUrl,
});
await gateway.load(mockApolloConfig);
await gateway.stop();
expect(logger.warn).not.toHaveBeenCalledWith(
expect.stringMatching(
/A local gateway configuration is overriding a managed federation configuration/,
),
);
});
it('throws when no configuration is provided', async () => {
gateway = new ApolloGateway({
logger,
});
expect(gateway.load()).rejects.toThrowErrorMatchingInlineSnapshot(
`"When a manual configuration is not provided, gateway requires an Apollo configuration. See https://www.apollographql.com/docs/apollo-server/federation/managed-federation/ for more information. Manual configuration options include: \`serviceList\`, \`supergraphSdl\`, and \`experimental_updateServiceDefinitions\`."`,
);
// Set to `null` so we don't try to call `stop` on it in the `afterEach`,
// which triggers a different error that we're not testing for here.
gateway = null;
});
});
describe('gateway startup errors', () => {
it("throws when static config can't be composed", async () => {
const uncomposableSdl = gql`
type Query {
me: User
everyone: [User]
account(id: String): Account
}
type User @key(fields: "id") {
name: String
username: String
}
type Account @key(fields: "id") {
name: String
username: String
}
`;
const gateway = new ApolloGateway({
localServiceList: [
{ name: 'accounts', url: service.url, typeDefs: uncomposableSdl },
],
logger,
});
// This is the ideal, but our version of Jest has a bug with printing error snapshots.
// See: https://github.com/facebook/jest/pull/10217 (fixed in v26.2.0)
// expect(gateway.load()).rejects.toThrowErrorMatchingInlineSnapshot(`
// "A valid schema couldn't be composed. The following composition errors were found:
// [accounts] User -> A @key selects id, but User.id could not be found
// [accounts] Account -> A @key selects id, but Account.id could not be found"
// `);
// Instead we'll just use the regular snapshot matcher...
let err: any;
try {
await gateway.load();
} catch (e) {
err = e;
}
expect(err.message).toMatchInlineSnapshot(`
"A valid schema couldn't be composed. The following composition errors were found:
[accounts] Account -> A @key selects id, but Account.id could not be found
[accounts] User -> A @key selects id, but User.id could not be found"
`);
});
});
describe('gateway config / env behavior', () => {
let gateway: ApolloGateway | null = null;
let cleanUp: (() => void) | null = null;
afterEach(async () => {
if (gateway) {
await gateway.stop();
gateway = null;
}
if (cleanUp) {
cleanUp();
cleanUp = null;
}
});
describe('introspection headers', () => {
it('should allow not passing introspectionHeaders', async () => {
const receivedHeaders = jest.fn();
const nock = mockSdlQuerySuccess(service);
nock.on('request', (req: http.ClientRequest) =>
receivedHeaders(req.getHeaders()),
);
gateway = new ApolloGateway({
serviceList: [{ name: 'accounts', url: service.url }],
});
await gateway.load(mockApolloConfig);
expect(receivedHeaders).toHaveBeenCalledWith(
expect.objectContaining({
host: 'localhost:4001',
}),
);
});
it('should use static headers', async () => {
const receivedHeaders = jest.fn();
const nock = mockSdlQuerySuccess(service);
nock.on('request', (req: http.ClientRequest) =>
receivedHeaders(req.getHeaders()),
);
gateway = new ApolloGateway({
serviceList: [{ name: 'accounts', url: service.url }],
introspectionHeaders: {
Authorization: 'Bearer static',
},
});
await gateway.load(mockApolloConfig);
expect(receivedHeaders).toHaveBeenCalledWith(
expect.objectContaining({
authorization: ['Bearer static'],
}),
);
});
it('should use dynamic async headers', async () => {
const receivedHeaders = jest.fn();
const nock = mockSdlQuerySuccess(service);
nock.on('request', (req: http.ClientRequest) =>
receivedHeaders(req.getHeaders()),
);
gateway = new ApolloGateway({
serviceList: [{ name: 'accounts', url: service.url }],
introspectionHeaders: async ({ name }) => ({
Authorization: 'Bearer dynamic-async',
'X-Service-Name': name,
}),
});
await gateway.load(mockApolloConfig);
expect(receivedHeaders).toHaveBeenCalledWith(
expect.objectContaining({
authorization: ['Bearer dynamic-async'],
'x-service-name': ['accounts'],
}),
);
});
it('should use dynamic non-async headers', async () => {
const receivedHeaders = jest.fn();
const nock = mockSdlQuerySuccess(service);
nock.on('request', (req: http.ClientRequest) =>
receivedHeaders(req.getHeaders()),
);
gateway = new ApolloGateway({
serviceList: [{ name: 'accounts', url: service.url }],
introspectionHeaders: ({ name }) => ({
Authorization: 'Bearer dynamic-sync',
'X-Service-Name': name,
}),
});
await gateway.load(mockApolloConfig);
expect(receivedHeaders).toHaveBeenCalledWith(
expect.objectContaining({
authorization: ['Bearer dynamic-sync'],
'x-service-name': ['accounts'],
}),
);
});
});
describe('schema config delivery endpoint configuration', () => {
it('A code config overrides the env variable', async () => {
cleanUp = mockedEnv({
APOLLO_SCHEMA_CONFIG_DELIVERY_ENDPOINT: 'env-config',
});
gateway = new ApolloGateway({
logger,
schemaConfigDeliveryEndpoint: 'code-config',
});
expect(gateway['schemaConfigDeliveryEndpoint']).toEqual(
'code-config',
);
gateway = null;
});
});
});