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mutations-test.js
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mutations-test.js
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import { expect } from 'chai';
import { describe, it } from 'mocha';
import { resolveOnNextTick } from '../../__testUtils__/resolveOnNextTick';
import { parse } from '../../language/parser';
import { GraphQLInt } from '../../type/scalars';
import { GraphQLSchema } from '../../type/schema';
import { GraphQLObjectType } from '../../type/definition';
import { execute, executeSync } from '../execute';
class NumberHolder {
theNumber: number;
constructor(originalNumber: number) {
this.theNumber = originalNumber;
}
}
class Root {
numberHolder: NumberHolder;
constructor(originalNumber: number) {
this.numberHolder = new NumberHolder(originalNumber);
}
immediatelyChangeTheNumber(newNumber: number): NumberHolder {
this.numberHolder.theNumber = newNumber;
return this.numberHolder;
}
async promiseToChangeTheNumber(newNumber: number): Promise<NumberHolder> {
await resolveOnNextTick();
return this.immediatelyChangeTheNumber(newNumber);
}
failToChangeTheNumber(): NumberHolder {
throw new Error('Cannot change the number');
}
async promiseAndFailToChangeTheNumber(): Promise<NumberHolder> {
await resolveOnNextTick();
throw new Error('Cannot change the number');
}
}
const numberHolderType = new GraphQLObjectType({
fields: {
theNumber: { type: GraphQLInt },
},
name: 'NumberHolder',
});
const schema = new GraphQLSchema({
query: new GraphQLObjectType({
fields: {
numberHolder: { type: numberHolderType },
},
name: 'Query',
}),
mutation: new GraphQLObjectType({
fields: {
immediatelyChangeTheNumber: {
type: numberHolderType,
args: { newNumber: { type: GraphQLInt } },
resolve(obj, { newNumber }) {
return obj.immediatelyChangeTheNumber(newNumber);
},
},
promiseToChangeTheNumber: {
type: numberHolderType,
args: { newNumber: { type: GraphQLInt } },
resolve(obj, { newNumber }) {
return obj.promiseToChangeTheNumber(newNumber);
},
},
failToChangeTheNumber: {
type: numberHolderType,
args: { newNumber: { type: GraphQLInt } },
resolve(obj, { newNumber }) {
return obj.failToChangeTheNumber(newNumber);
},
},
promiseAndFailToChangeTheNumber: {
type: numberHolderType,
args: { newNumber: { type: GraphQLInt } },
resolve(obj, { newNumber }) {
return obj.promiseAndFailToChangeTheNumber(newNumber);
},
},
},
name: 'Mutation',
}),
});
describe('Execute: Handles mutation execution ordering', () => {
it('evaluates mutations serially', async () => {
const document = parse(`
mutation M {
first: immediatelyChangeTheNumber(newNumber: 1) {
theNumber
},
second: promiseToChangeTheNumber(newNumber: 2) {
theNumber
},
third: immediatelyChangeTheNumber(newNumber: 3) {
theNumber
}
fourth: promiseToChangeTheNumber(newNumber: 4) {
theNumber
},
fifth: immediatelyChangeTheNumber(newNumber: 5) {
theNumber
}
}
`);
const rootValue = new Root(6);
const mutationResult = await execute({ schema, document, rootValue });
expect(mutationResult).to.deep.equal({
data: {
first: { theNumber: 1 },
second: { theNumber: 2 },
third: { theNumber: 3 },
fourth: { theNumber: 4 },
fifth: { theNumber: 5 },
},
});
});
it('does not include illegal mutation fields in output', () => {
const document = parse('mutation { thisIsIllegalDoNotIncludeMe }');
const result = executeSync({ schema, document });
expect(result).to.deep.equal({
data: {},
});
});
it('evaluates mutations correctly in the presence of a failed mutation', async () => {
const document = parse(`
mutation M {
first: immediatelyChangeTheNumber(newNumber: 1) {
theNumber
},
second: promiseToChangeTheNumber(newNumber: 2) {
theNumber
},
third: failToChangeTheNumber(newNumber: 3) {
theNumber
}
fourth: promiseToChangeTheNumber(newNumber: 4) {
theNumber
},
fifth: immediatelyChangeTheNumber(newNumber: 5) {
theNumber
}
sixth: promiseAndFailToChangeTheNumber(newNumber: 6) {
theNumber
}
}
`);
const rootValue = new Root(6);
const result = await execute({ schema, document, rootValue });
expect(result).to.deep.equal({
data: {
first: { theNumber: 1 },
second: { theNumber: 2 },
third: null,
fourth: { theNumber: 4 },
fifth: { theNumber: 5 },
sixth: null,
},
errors: [
{
message: 'Cannot change the number',
locations: [{ line: 9, column: 9 }],
path: ['third'],
},
{
message: 'Cannot change the number',
locations: [{ line: 18, column: 9 }],
path: ['sixth'],
},
],
});
});
});