···
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// See: https://github.com/graphql/graphql-js/blob/976d64b/src/language/__tests__/printer-test.ts
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import { parse } from '../parser';
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import { print } from '../printer';
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describe('Printer: Query document', () => {
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it('prints minimal ast', () => {
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name: { kind: 'Name', value: 'foo' },
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expect(print(ast)).toBe('foo');
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// NOTE: The shim won't throw for invalid AST nodes
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it('returns empty strings for invalid AST', () => {
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const badAST = { random: 'Data' };
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expect(print(badAST)).toBe('');
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it('correctly prints non-query operations without name', () => {
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const queryASTShorthanded = parse('query { id, name }');
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expect(print(queryASTShorthanded)).toBe(dedent`
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const mutationAST = parse('mutation { id, name }');
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expect(print(mutationAST)).toBe(dedent`
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const queryASTWithArtifacts = parse(
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'query ($foo: TestType) @testDirective { id, name }'
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expect(print(queryASTWithArtifacts)).toBe(dedent`
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query ($foo: TestType) @testDirective {
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const mutationASTWithArtifacts = parse(
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'mutation ($foo: TestType) @testDirective { id, name }'
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expect(print(mutationASTWithArtifacts)).toBe(dedent`
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mutation ($foo: TestType) @testDirective {
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it('prints query with variable directives', () => {
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const queryASTWithVariableDirective = parse(
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'query ($foo: TestType = {a: 123} @testDirective(if: true) @test) { id }'
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expect(print(queryASTWithVariableDirective)).toBe(dedent`
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query ($foo: TestType = {a: 123} @testDirective(if: true) @test) {
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it('keeps arguments on one line if line is short (<= 80 chars)', () => {
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const printed = print(
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parse('{trip(wheelchair:false arriveBy:false){dateTime}}')
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expect(printed).toBe(
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trip(wheelchair: false, arriveBy: false) {
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it('prints kitchen sink without altering ast', () => {
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const ast = parse(kitchenSinkQuery, { noLocation: true });
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const astBeforePrintCall = JSON.stringify(ast);
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const printed = print(ast);
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const printedAST = parse(printed, { noLocation: true });
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expect(printedAST).toEqual(ast);
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expect(JSON.stringify(ast)).toBe(astBeforePrintCall);
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expect(printed).toBe(
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dedentString(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: $foo) {
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mutation likeStory @onMutation {
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like(story: 123) @onField {
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subscription StoryLikeSubscription($input: StoryLikeSubscribeInput @onVariableDefinition) @onSubscription {
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storyLikeSubscribe(input: $input) {
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fragment frag on Friend @onFragmentDefinition {
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foo(size: $size, bar: $b, obj: {key: "value"})
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unnamed(truthy: true, falsy: false, nullish: null)
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const kitchenSinkQuery = String.raw`
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query queryName($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: $input) {
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+
fragment frag on Friend @onFragmentDefinition {
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obj: { key: "value" }
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+
unnamed(truthy: true, falsy: false, nullish: null)
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function dedentString(string) {
217
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const trimmedStr = string
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.replace(/^\n*/m, '') // remove leading newline
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.replace(/[ \t\n]*$/, ''); // remove trailing spaces and tabs
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+
// fixes indentation by removing leading spaces and tabs from each line
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+
for (const char of trimmedStr) {
223
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if (char !== ' ' && char !== '\t') {
229
+
return trimmedStr.replace(RegExp('^' + indent, 'mg'), ''); // remove indent
232
+
function dedent(strings, ...values) {
233
+
let str = strings[0];
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for (let i = 1; i < strings.length; ++i) str += values[i - 1] + strings[i]; // interpolation
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return dedentString(str) + '\n';
kitten.sh