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externalTypeMismatch.test.ts
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externalTypeMismatch.test.ts
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import gql from 'graphql-tag';
import { externalTypeMismatch as validateExternalTypeMismatch } from '../';
import { composeServices } from '../../../compose';
import { graphqlErrorSerializer } from 'apollo-federation-integration-testsuite';
expect.addSnapshotSerializer(graphqlErrorSerializer);
describe('validateExternalDirectivesOnSchema', () => {
it('warns when the type of an @external field doesnt match the base', () => {
const serviceA = {
typeDefs: gql`
type Product @key(fields: "sku skew") {
sku: String!
skew: String
upc: String!
}
`,
name: 'serviceA',
};
const serviceB = {
typeDefs: gql`
extend type Product {
sku: String @external
skew: String! @external
price: Int! @requires(fields: "sku skew")
}
`,
name: 'serviceB',
};
const serviceList = [serviceA, serviceB];
const { schema } = composeServices(serviceList);
const warnings = validateExternalTypeMismatch({ schema, serviceList });
expect(warnings).toMatchInlineSnapshot(`
Array [
Object {
"code": "EXTERNAL_TYPE_MISMATCH",
"message": "[serviceB] Product.sku -> Type \`String\` does not match the type of the original field in serviceA (\`String!\`)",
},
Object {
"code": "EXTERNAL_TYPE_MISMATCH",
"message": "[serviceB] Product.skew -> Type \`String!\` does not match the type of the original field in serviceA (\`String\`)",
},
]
`);
});
it("warns when an @external field's type does not exist in the composed schema", () => {
const serviceA = {
typeDefs: gql`
type Product @key(fields: "sku") {
sku: String!
upc: String!
}
`,
name: 'serviceA',
};
const serviceB = {
typeDefs: gql`
extend type Product {
sku: NonExistentType! @external
id: String! @requires(fields: "sku")
}
`,
name: 'serviceB',
};
const serviceList = [serviceA, serviceB];
const { schema } = composeServices(serviceList);
const warnings = validateExternalTypeMismatch({ schema, serviceList });
expect(warnings).toMatchInlineSnapshot(`
Array [
Object {
"code": "EXTERNAL_TYPE_MISMATCH",
"message": "[serviceB] Product.sku -> the type of the @external field does not exist in the resulting composed schema",
},
]
`);
});
});