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coerceInputValue-test.js
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coerceInputValue-test.js
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import { expect } from 'chai';
import { describe, it } from 'mocha';
import invariant from '../../jsutils/invariant';
import type { GraphQLInputType } from '../../type/definition';
import { GraphQLInt } from '../../type/scalars';
import {
GraphQLList,
GraphQLNonNull,
GraphQLScalarType,
GraphQLEnumType,
GraphQLInputObjectType,
} from '../../type/definition';
import { coerceInputValue } from '../coerceInputValue';
function expectValue(result: any) {
expect(result.errors).to.deep.equal([]);
return expect(result.value);
}
function expectErrors(result: any) {
return expect(result.errors);
}
describe('coerceInputValue', () => {
function coerceValue(inputValue: mixed, type: GraphQLInputType) {
const errors = [];
const value = coerceInputValue(
inputValue,
type,
(path, invalidValue, error) => {
errors.push({ path, value: invalidValue, error: error.message });
},
);
return { errors, value };
}
describe('for GraphQLNonNull', () => {
const TestNonNull = new GraphQLNonNull(GraphQLInt);
it('returns no error for non-null value', () => {
const result = coerceValue(1, TestNonNull);
expectValue(result).to.equal(1);
});
it('returns an error for undefined value', () => {
const result = coerceValue(undefined, TestNonNull);
expectErrors(result).to.deep.equal([
{
error: 'Expected non-nullable type "Int!" not to be null.',
path: [],
value: undefined,
},
]);
});
it('returns an error for null value', () => {
const result = coerceValue(null, TestNonNull);
expectErrors(result).to.deep.equal([
{
error: 'Expected non-nullable type "Int!" not to be null.',
path: [],
value: null,
},
]);
});
});
describe('for GraphQLScalar', () => {
const TestScalar = new GraphQLScalarType({
name: 'TestScalar',
parseValue(input) {
invariant(typeof input === 'object' && input !== null);
if (input.error != null) {
throw new Error(input.error);
}
return input.value;
},
});
it('returns no error for valid input', () => {
const result = coerceValue({ value: 1 }, TestScalar);
expectValue(result).to.equal(1);
});
it('returns no error for null result', () => {
const result = coerceValue({ value: null }, TestScalar);
expectValue(result).to.equal(null);
});
it('returns no error for NaN result', () => {
const result = coerceValue({ value: NaN }, TestScalar);
expectValue(result).to.satisfy(Number.isNaN);
});
it('returns an error for undefined result', () => {
const result = coerceValue({ value: undefined }, TestScalar);
expectErrors(result).to.deep.equal([
{
error: 'Expected type "TestScalar".',
path: [],
value: { value: undefined },
},
]);
});
it('returns an error for undefined result', () => {
const inputValue = { error: 'Some error message' };
const result = coerceValue(inputValue, TestScalar);
expectErrors(result).to.deep.equal([
{
error: 'Expected type "TestScalar". Some error message',
path: [],
value: { error: 'Some error message' },
},
]);
});
});
describe('for GraphQLEnum', () => {
const TestEnum = new GraphQLEnumType({
name: 'TestEnum',
values: {
FOO: { value: 'InternalFoo' },
BAR: { value: 123456789 },
},
});
it('returns no error for a known enum name', () => {
const fooResult = coerceValue('FOO', TestEnum);
expectValue(fooResult).to.equal('InternalFoo');
const barResult = coerceValue('BAR', TestEnum);
expectValue(barResult).to.equal(123456789);
});
it('returns an error for misspelled enum value', () => {
const result = coerceValue('foo', TestEnum);
expectErrors(result).to.deep.equal([
{
error:
'Value "foo" does not exist in "TestEnum" enum. Did you mean the enum value "FOO"?',
path: [],
value: 'foo',
},
]);
});
it('returns an error for incorrect value type', () => {
const result1 = coerceValue(123, TestEnum);
expectErrors(result1).to.deep.equal([
{
error: 'Enum "TestEnum" cannot represent non-string value: 123.',
path: [],
value: 123,
},
]);
const result2 = coerceValue({ field: 'value' }, TestEnum);
expectErrors(result2).to.deep.equal([
{
error:
'Enum "TestEnum" cannot represent non-string value: { field: "value" }.',
path: [],
value: { field: 'value' },
},
]);
});
});
describe('for GraphQLInputObject', () => {
const TestInputObject = new GraphQLInputObjectType({
name: 'TestInputObject',
fields: {
foo: { type: new GraphQLNonNull(GraphQLInt) },
bar: { type: GraphQLInt },
},
});
it('returns no error for a valid input', () => {
const result = coerceValue({ foo: 123 }, TestInputObject);
expectValue(result).to.deep.equal({ foo: 123 });
});
it('returns an error for a non-object type', () => {
const result = coerceValue(123, TestInputObject);
expectErrors(result).to.deep.equal([
{
error: 'Expected type "TestInputObject" to be an object.',
path: [],
value: 123,
},
]);
});
it('returns an error for an invalid field', () => {
const result = coerceValue({ foo: NaN }, TestInputObject);
expectErrors(result).to.deep.equal([
{
error: 'Int cannot represent non-integer value: NaN',
path: ['foo'],
value: NaN,
},
]);
});
it('returns multiple errors for multiple invalid fields', () => {
const result = coerceValue({ foo: 'abc', bar: 'def' }, TestInputObject);
expectErrors(result).to.deep.equal([
{
error: 'Int cannot represent non-integer value: "abc"',
path: ['foo'],
value: 'abc',
},
{
error: 'Int cannot represent non-integer value: "def"',
path: ['bar'],
value: 'def',
},
]);
});
it('returns error for a missing required field', () => {
const result = coerceValue({ bar: 123 }, TestInputObject);
expectErrors(result).to.deep.equal([
{
error: 'Field "foo" of required type "Int!" was not provided.',
path: [],
value: { bar: 123 },
},
]);
});
it('returns error for an unknown field', () => {
const result = coerceValue(
{ foo: 123, unknownField: 123 },
TestInputObject,
);
expectErrors(result).to.deep.equal([
{
error:
'Field "unknownField" is not defined by type "TestInputObject".',
path: [],
value: { foo: 123, unknownField: 123 },
},
]);
});
it('returns error for a misspelled field', () => {
const result = coerceValue({ foo: 123, bart: 123 }, TestInputObject);
expectErrors(result).to.deep.equal([
{
error:
'Field "bart" is not defined by type "TestInputObject". Did you mean "bar"?',
path: [],
value: { foo: 123, bart: 123 },
},
]);
});
});
describe('for GraphQLInputObject with default value', () => {
const makeTestInputObject = (defaultValue) =>
new GraphQLInputObjectType({
name: 'TestInputObject',
fields: {
foo: {
type: new GraphQLScalarType({ name: 'TestScalar' }),
defaultValue,
},
},
});
it('returns no errors for valid input value', () => {
const result = coerceValue({ foo: 5 }, makeTestInputObject(7));
expectValue(result).to.deep.equal({ foo: 5 });
});
it('returns object with default value', () => {
const result = coerceValue({}, makeTestInputObject(7));
expectValue(result).to.deep.equal({ foo: 7 });
});
it('returns null as value', () => {
const result = coerceValue({}, makeTestInputObject(null));
expectValue(result).to.deep.equal({ foo: null });
});
it('returns NaN as value', () => {
const result = coerceValue({}, makeTestInputObject(NaN));
expectValue(result).to.have.property('foo').that.satisfy(Number.isNaN);
});
});
describe('for GraphQLList', () => {
const TestList = new GraphQLList(GraphQLInt);
it('returns no error for a valid input', () => {
const result = coerceValue([1, 2, 3], TestList);
expectValue(result).to.deep.equal([1, 2, 3]);
});
it('returns no error for a valid iterable input', () => {
function* listGenerator() {
yield 1;
yield 2;
yield 3;
}
const result = coerceValue(listGenerator(), TestList);
expectValue(result).to.deep.equal([1, 2, 3]);
});
it('returns an error for an invalid input', () => {
const result = coerceValue([1, 'b', true, 4], TestList);
expectErrors(result).to.deep.equal([
{
error: 'Int cannot represent non-integer value: "b"',
path: [1],
value: 'b',
},
{
error: 'Int cannot represent non-integer value: true',
path: [2],
value: true,
},
]);
});
it('returns a list for a non-list value', () => {
const result = coerceValue(42, TestList);
expectValue(result).to.deep.equal([42]);
});
it('returns an error for a non-list invalid value', () => {
const result = coerceValue('INVALID', TestList);
expectErrors(result).to.deep.equal([
{
error: 'Int cannot represent non-integer value: "INVALID"',
path: [],
value: 'INVALID',
},
]);
});
it('returns null for a null value', () => {
const result = coerceValue(null, TestList);
expectValue(result).to.deep.equal(null);
});
});
describe('for nested GraphQLList', () => {
const TestNestedList = new GraphQLList(new GraphQLList(GraphQLInt));
it('returns no error for a valid input', () => {
const result = coerceValue([[1], [2, 3]], TestNestedList);
expectValue(result).to.deep.equal([[1], [2, 3]]);
});
it('returns a list for a non-list value', () => {
const result = coerceValue(42, TestNestedList);
expectValue(result).to.deep.equal([[42]]);
});
it('returns null for a null value', () => {
const result = coerceValue(null, TestNestedList);
expectValue(result).to.deep.equal(null);
});
it('returns nested lists for nested non-list values', () => {
const result = coerceValue([1, 2, 3], TestNestedList);
expectValue(result).to.deep.equal([[1], [2], [3]]);
});
it('returns nested null for nested null values', () => {
const result = coerceValue([42, [null], null], TestNestedList);
expectValue(result).to.deep.equal([[42], [null], null]);
});
});
describe('with default onError', () => {
it('throw error without path', () => {
expect(() =>
coerceInputValue(null, new GraphQLNonNull(GraphQLInt)),
).to.throw(
'Invalid value null: Expected non-nullable type "Int!" not to be null.',
);
});
it('throw error with path', () => {
expect(() =>
coerceInputValue(
[null],
new GraphQLList(new GraphQLNonNull(GraphQLInt)),
),
).to.throw(
'Invalid value null at "value[0]": Expected non-nullable type "Int!" not to be null.',
);
});
});
});