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287-test.js
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287-test.js
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/* @flow */
import { buildSchema, GraphQLSchema } from 'graphql';
import { SchemaComposer, dedent, graphqlVersion } from '../..';
describe('github issue #287: Can we merge schemas with overriding types in fields', () => {
it('merge two simple schemas', () => {
if (graphqlVersion < 15) return;
const schemaA = buildSchema(`
type Query {
field1: Int
"""KEEP ME"""
field2: Int
}
`);
const schemaB = buildSchema(`
type Query {
"""BBB"""
field1: String
field3: String
field22: Int
}
`);
const sc = new SchemaComposer(schemaA);
sc.merge(schemaB);
expect(sc.toSDL({ omitScalars: true, omitDirectiveDefinitions: true })).toEqual(dedent`
type Mutation
type Query {
"""BBB"""
field1: String
"""KEEP ME"""
field2: Int
field3: String
field22: Int
}
type Subscription
`);
expect(sc.buildSchema()).toBeInstanceOf(GraphQLSchema);
});
it('it merges field & arg types', () => {
if (graphqlVersion < 15) return;
const schemaA = buildSchema(`
# An object with an ID
interface Node {
# The id of the object.
id: ID!
}
type Post implements Node {
id: ID!
content: String
fieldA: Int
fieldB: String
}
type Query {
post: Post
# Fetches an object given its ID
node(
# The ID of an object
id: ID!
): Node
}
`);
const schemaB = buildSchema(`
# An object with an ID
interface Node {
# The id of the object.
id: ID!
}
type Post implements Node {
id: ID!
content: String
}
type Query {
post: Post
# Fetches an object given its ID
node(
# The ID of an object
id: ID!
): Node
}
`);
const sc = new SchemaComposer(schemaA);
sc.merge(schemaB);
expect(sc.toSDL({ omitScalars: true, omitDirectiveDefinitions: true })).toEqual(dedent`
type Mutation
interface Node {
id: ID!
}
type Post implements Node {
id: ID!
content: String
fieldA: Int
fieldB: String
}
type Query {
post: Post
node(id: ID!): Node
}
type Subscription
`);
});
it('should not throw contains multiple types named "Node"', () => {
if (graphqlVersion < 15) return;
const typeDefsA = `
type Mutation {
createPost(data: String!): Post!
}
interface Node {
id: ID!
}
type Post implements Node {
id: ID!
title: String!
}
type PostConnection {
edges: [PostEdge]!
}
type PostEdge {
node: Post!
}
type PostSubscriptionPayload {
node: Post
}
input PostUpdateManyMutationInput {
title: String
content: String
}
type Query {
posts(first: Int, last: Int): [Post]!
postsConnection(first: Int, last: Int): PostConnection!
node(id: ID!): Node
}
type Subscription {
post(where: String): PostSubscriptionPayload
}
`;
const typeDefsB = `
type Mutation {
createPost(data: String!): Post!
}
interface Node {
id: ID!
}
type Post implements Node {
id: ID!
content: String
}
type PostConnection {
edges: [PostEdge]!
}
type PostEdge {
node: Post!
}
type PostSubscriptionPayload {
node: Post
}
type Query {
posts: [Post]!
postsConnection: PostConnection!
node(id: ID!): Node
}
type Subscription {
post(where: String): PostSubscriptionPayload
}
`;
const schemaA = buildSchema(typeDefsA);
const schemaB = buildSchema(typeDefsB);
const sc = new SchemaComposer(schemaA);
sc.merge(schemaB);
expect(() => {
sc.buildSchema();
}).not.toThrow(/contains multiple types named "Node"/);
});
});