···
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// See: https://github.com/graphql/graphql-js/blob/976d64b/src/language/__tests__/parser-test.ts
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// Note: Tests regarding reserved keywords have been removed.
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import { Kind } from 'graphql';
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import { parse, parseValue, parseType } from '../parser';
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describe('Parser', () => {
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it('parse provides errors', () => {
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expect(() => parse('{')).toThrow();
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it('parses variable inline values', () => {
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return parse('{ field(complex: { a: { b: [ $var ] } }) }');
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it('parses constant default values', () => {
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return parse('query Foo($x: Complex = { a: { b: [ $var ] } }) { field }');
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it('parses variable definition directives', () => {
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return parse('query Foo($x: Boolean = false @bar) { field }');
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it('does not accept fragments spread of "on"', () => {
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return parse('{ ...on }');
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it('parses multi-byte characters', () => {
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// Note: \u0A0A could be naively interpreted as two line-feed chars.
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# This comment has a \u0A0A multi-byte character.
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{ field(arg: "Has a \u0A0A multi-byte character.") }
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expect(ast).toHaveProperty(
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'definitions.0.selectionSet.selections.0.arguments.0.value.value',
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'Has a \u0A0A multi-byte character.'
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it('parses kitchen sink', () => {
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expect(() => parse(kitchenSinkQuery)).not.toThrow();
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it('parses anonymous mutation operations', () => {
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it('parses anonymous subscription operations', () => {
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it('parses named mutation operations', () => {
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it('parses named subscription operations', () => {
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it('creates ast', () => {
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const result = parse(`
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expect(result).toMatchObject({
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kind: Kind.DOCUMENT,
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kind: Kind.OPERATION_DEFINITION,
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operation: 'query',
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variableDefinitions: [],
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kind: Kind.SELECTION_SET,
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kind: Kind.ARGUMENT,
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kind: Kind.SELECTION_SET,
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selectionSet: undefined,
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selectionSet: undefined,
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it('creates ast from nameless query without variables', () => {
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const result = parse(`
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expect(result).toMatchObject({
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kind: Kind.DOCUMENT,
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kind: Kind.OPERATION_DEFINITION,
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operation: 'query',
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variableDefinitions: [],
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kind: Kind.SELECTION_SET,
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kind: Kind.SELECTION_SET,
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selectionSet: undefined,
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it('allows parsing without source location information', () => {
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const result = parse('{ id }', { noLocation: true });
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expect('loc' in result).toBe(false);
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describe('parseValue', () => {
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it('parses null value', () => {
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const result = parseValue('null');
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expect(result).toEqual({ kind: Kind.NULL });
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it('parses list values', () => {
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const result = parseValue('[123 "abc"]');
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expect(result).toEqual({
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it('parses block strings', () => {
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const result = parseValue('["""long""" "short"]');
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expect(result).toEqual({
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it('allows variables', () => {
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const result = parseValue('{ field: $var }');
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expect(result).toEqual({
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kind: Kind.OBJECT_FIELD,
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kind: Kind.VARIABLE,
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it('correct message for incomplete variable', () => {
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return parseValue('$');
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it('correct message for unexpected token', () => {
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return parseValue(':');
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describe('parseType', () => {
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it('parses well known types', () => {
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const result = parseType('String');
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expect(result).toEqual({
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kind: Kind.NAMED_TYPE,
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it('parses custom types', () => {
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const result = parseType('MyType');
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expect(result).toEqual({
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kind: Kind.NAMED_TYPE,
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it('parses list types', () => {
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const result = parseType('[MyType]');
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expect(result).toEqual({
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kind: Kind.LIST_TYPE,
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kind: Kind.NAMED_TYPE,
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it('parses non-null types', () => {
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const result = parseType('MyType!');
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expect(result).toEqual({
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kind: Kind.NON_NULL_TYPE,
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kind: Kind.NAMED_TYPE,
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it('parses nested types', () => {
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const result = parseType('[MyType!]');
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expect(result).toEqual({
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kind: Kind.LIST_TYPE,
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kind: Kind.NON_NULL_TYPE,
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kind: Kind.NAMED_TYPE,
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const kitchenSinkQuery: string = String.raw`
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query queryName($foo: ComplexType, $site: Site = MOBILE) @onQuery {
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whoever123is: node(id: [123, 456]) {
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... on User @onInlineFragment {
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alias: field1(first: 10, after: $foo) @include(if: $foo) {
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...frag @onFragmentSpread
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... @skip(unless: $foo) {
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mutation likeStory @onMutation {
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like(story: 123) @onField {
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subscription StoryLikeSubscription(
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$input: StoryLikeSubscribeInput @onVariableDefinition
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storyLikeSubscribe(input: $input) {
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fragment frag on Friend @onFragmentDefinition {
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block string uses \"""
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unnamed(truthy: true, falsy: false, nullish: null)
kitten.sh