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add tests
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‎src/transform/__tests__/buildTransformationContext-test.ts‎

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import { expect } from 'chai';
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import { describe, it } from 'mocha';
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import { invariant } from '../../jsutils/invariant.js';
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import { parse } from '../../language/parser.js';
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import { GraphQLObjectType } from '../../type/definition.js';
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import { GraphQLString } from '../../type/scalars.js';
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import { GraphQLSchema } from '../../type/schema.js';
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import { validateExecutionArgs } from '../../execution/execute.js';
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import { buildTransformationContext } from '../buildTransformationContext.js';
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const schema = new GraphQLSchema({
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query: new GraphQLObjectType({
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name: 'Query',
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fields: { someField: { type: GraphQLString } },
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}),
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});
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describe('buildTransformationContext', () => {
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it('should build a transformation context', () => {
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document: parse('{ someField }'),
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});
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invariant('schema' in validatedExecutionArgs);
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const context = buildTransformationContext(
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validatedExecutionArgs,
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'__prefix__',
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);
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expect(context.deferUsageMap instanceof Map).to.equal(true);
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expect(context.streamUsageMap instanceof Map).to.equal(true);
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expect(context.prefix).to.equal('__prefix__');
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expect(context.pendingLabelsByPath instanceof Map).to.equal(true);
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expect(context.pendingResultsById instanceof Map).to.equal(true);
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expect(context.mergedResult).to.deep.equal({});
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});
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it('should handle non-standard directives', () => {
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document: parse('{ ... @someDirective { someField } }'),
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});
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invariant('schema' in validatedExecutionArgs);
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expect(() =>
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buildTransformationContext(validatedExecutionArgs, '__prefix__'),
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).not.to.throw();
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});
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});

‎src/transform/__tests__/collectFields-test.ts‎

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import { expect } from 'chai';
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import { describe, it } from 'mocha';
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import { invariant } from '../../jsutils/invariant.js';
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import { Kind } from '../../language/kinds.js';
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import { parse } from '../../language/parser.js';
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import {
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GraphQLInterfaceType,
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GraphQLObjectType,
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} from '../../type/definition.js';
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import { GraphQLString } from '../../type/scalars.js';
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import { GraphQLSchema } from '../../type/schema.js';
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import { validateExecutionArgs } from '../../execution/execute.js';
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import { collectFields, collectSubfields } from '../collectFields.js';
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describe('collectFields', () => {
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const someParentInterface = new GraphQLInterfaceType({
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name: 'SomeParentInterface',
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fields: { someField: { type: GraphQLString } },
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});
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const someChildInterface = new GraphQLInterfaceType({
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name: 'SomeChildInterface',
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interfaces: [someParentInterface],
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fields: { someField: { type: GraphQLString } },
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});
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const someObjectType = new GraphQLObjectType({
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name: 'SomeObjectType',
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interfaces: [someChildInterface, someParentInterface],
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fields: { someField: { type: GraphQLString } },
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});
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const query = new GraphQLObjectType({
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name: 'Query',
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fields: {
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someField: { type: GraphQLString },
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anotherField: { type: someParentInterface },
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},
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});
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const schema = new GraphQLSchema({
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query,
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types: [someObjectType],
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});
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it('collects fields from a selection set', () => {
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const document = parse('{ someField }');
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.get('someField')).to.deep.equal([
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{
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node: validatedExecutionArgs.operation.selectionSet.selections[0],
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fragmentVariableValues: undefined,
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},
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]);
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});
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it('collects fields, skipping a field', () => {
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const document = parse('{ someField @skip(if: true) }');
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.size).to.equal(0);
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});
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it('collects fields, not including a field', () => {
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const document = parse('{ someField @include(if: false) }');
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.size).to.equal(0);
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});
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it('collects fields from a selection with an inline fragment', () => {
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const document = parse('{ ... { someField } }');
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const inlineFragment =
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validatedExecutionArgs.operation.selectionSet.selections[0];
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invariant(inlineFragment.kind === Kind.INLINE_FRAGMENT);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.get('someField')).to.deep.equal([
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{
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node: inlineFragment.selectionSet.selections[0],
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fragmentVariableValues: undefined,
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},
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]);
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});
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it('collects fields from a selection with a named fragment with a non-matching conditional type', () => {
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const document = parse(`
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query { ...SomeFragment }
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fragment SomeFragment on SomeObject { someField }
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`);
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.size).to.equal(0);
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});
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it('collects fields from a selection with an inline fragment with a conditional type', () => {
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const document = parse('{ ... on Query { someField } }');
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const inlineFragment =
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validatedExecutionArgs.operation.selectionSet.selections[0];
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invariant(inlineFragment.kind === Kind.INLINE_FRAGMENT);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.get('someField')).to.deep.equal([
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{
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node: inlineFragment.selectionSet.selections[0],
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fragmentVariableValues: undefined,
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},
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]);
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});
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it('collects fields from a selection with an inline fragment with a conditional abstract subtype', () => {
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const document = parse(
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'{ anotherField { ... on SomeChildInterface { someField } } }',
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);
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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const fieldDetailsList = groupedFieldSet.get('anotherField');
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invariant(fieldDetailsList != null);
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const { groupedFieldSet: nestedGroupedFieldSet } = collectSubfields(
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validatedExecutionArgs,
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someObjectType,
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fieldDetailsList,
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);
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const field = validatedExecutionArgs.operation.selectionSet.selections[0];
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invariant(field.kind === Kind.FIELD);
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const inlineFragment = field.selectionSet?.selections[0];
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invariant(inlineFragment?.kind === Kind.INLINE_FRAGMENT);
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expect(nestedGroupedFieldSet.get('someField')).to.deep.equal([
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{
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node: inlineFragment.selectionSet.selections[0],
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fragmentVariableValues: undefined,
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},
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]);
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});
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it('collects fields from a selection with an inline fragment with a non-matching conditional subtype', () => {
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const document = parse('{ ... on SomeObject { someField } }');
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.size).to.equal(0);
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});
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it('collects fields, using fragment variables', () => {
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const document = parse(
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`
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query { ...SomeFragment(skip: false) }
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fragment SomeFragment($skip: Boolean ) on Query { someField @skip(if: $skip) }
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`,
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{
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experimentalFragmentArguments: true,
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},
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);
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const validatedExecutionArgs = validateExecutionArgs({
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schema,
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document,
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});
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invariant('schema' in validatedExecutionArgs);
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const { groupedFieldSet } = collectFields(
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validatedExecutionArgs,
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query,
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validatedExecutionArgs.operation.selectionSet,
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);
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expect(groupedFieldSet.size).to.equal(1);
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});
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});

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