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Merge pull request #117 from samisuteria/federation-parsing
add tests for federation schema parsing
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‎Tests/GraphQLTests/FederationTests/FederationTests.swift

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@testable import GraphQL
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import XCTest
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final class FederationTests: XCTestCase {
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func testFederationSampleSchema() throws {
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// Confirm that the Apollo test schema can be parsed as expected https://github.com/apollographql/apollo-federation-subgraph-compatibility/blob/main/COMPATIBILITY.md
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let source =
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"""
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extend schema
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@link(
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url: "https://specs.apollo.dev/federation/v2.0",
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import: [
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"@extends",
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"@external",
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"@key",
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"@inaccessible",
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"@override",
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"@provides",
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"@requires",
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"@shareable",
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"@tag"
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]
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)
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type Product
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@key(fields: "id")
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@key(fields: "sku package")
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@key(fields: "sku variation { id }") {
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id: ID!
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sku: String
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package: String
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variation: ProductVariation
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dimensions: ProductDimension
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createdBy: User @provides(fields: "totalProductsCreated")
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notes: String @tag(name: "internal")
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research: [ProductResearch!]!
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}
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type DeprecatedProduct @key(fields: "sku package") {
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sku: String!
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package: String!
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reason: String
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createdBy: User
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}
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type ProductVariation {
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id: ID!
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}
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type ProductResearch @key(fields: "study { caseNumber }") {
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study: CaseStudy!
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outcome: String
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}
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type CaseStudy {
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caseNumber: ID!
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description: String
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}
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type ProductDimension @shareable {
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size: String
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weight: Float
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unit: String @inaccessible
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}
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extend type Query {
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product(id: ID!): Product
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deprecatedProduct(sku: String!, package: String!): DeprecatedProduct @deprecated(reason: "Use product query instead")
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}
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extend type User @key(fields: "email") {
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averageProductsCreatedPerYear: Int @requires(fields: "totalProductsCreated yearsOfEmployment")
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email: ID! @external
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name: String @override(from: "users")
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totalProductsCreated: Int @external
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yearsOfEmployment: Int! @external
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}
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"""
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let schemaExtensionDefinition =
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SchemaExtensionDefinition(definition: SchemaDefinition(directives: [
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Directive(name: nameNode("link"), arguments: [
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Argument(
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name: nameNode("url"),
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value: StringValue(
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value: "https://specs.apollo.dev/federation/v2.0",
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block: false
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)
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),
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Argument(
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name: nameNode("import"),
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value: ListValue(values: [
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StringValue(value: "@extends", block: false),
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StringValue(value: "@external", block: false),
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StringValue(value: "@key", block: false),
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StringValue(value: "@inaccessible", block: false),
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StringValue(value: "@override", block: false),
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StringValue(value: "@provides", block: false),
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StringValue(value: "@requires", block: false),
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StringValue(value: "@shareable", block: false),
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StringValue(value: "@tag", block: false),
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])
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),
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]),
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], operationTypes: []))
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let productObjectTypeDefinition = ObjectTypeDefinition(
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name: nameNode("Product"),
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directives: [
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Directive(name: nameNode("key"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(value: "id", block: false)
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),
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]),
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Directive(name: nameNode("key"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(value: "sku package", block: false)
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),
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]),
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Directive(name: nameNode("key"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(value: "sku variation { id }", block: false)
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),
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]),
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],
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fields: [
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FieldDefinition(name: nameNode("id"), type: NonNullType(type: typeNode("ID"))),
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FieldDefinition(name: nameNode("sku"), type: typeNode("String")),
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FieldDefinition(name: nameNode("package"), type: typeNode("String")),
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FieldDefinition(name: nameNode("variation"), type: typeNode("ProductVariation")),
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FieldDefinition(name: nameNode("dimensions"), type: typeNode("ProductDimension")),
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FieldDefinition(name: nameNode("createdBy"), type: typeNode("User"), directives: [
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Directive(name: nameNode("provides"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(value: "totalProductsCreated", block: false)
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),
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]),
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]),
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FieldDefinition(name: nameNode("notes"), type: typeNode("String"), directives: [
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Directive(name: nameNode("tag"), arguments: [
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Argument(
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name: nameNode("name"),
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value: StringValue(value: "internal", block: false)
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),
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]),
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]),
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FieldDefinition(
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name: nameNode("research"),
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type: NonNullType(
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type: ListType(
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type: NonNullType(type: NamedType(name: nameNode("ProductResearch")))
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)
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)
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),
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]
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)
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let deprecatedProductObjectTypeDefinition = ObjectTypeDefinition(
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name: nameNode("DeprecatedProduct"),
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directives: [
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Directive(name: nameNode("key"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(value: "sku package", block: false)
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),
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]),
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],
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fields: [
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FieldDefinition(name: nameNode("sku"), type: NonNullType(type: typeNode("String"))),
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FieldDefinition(
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name: nameNode("package"),
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type: NonNullType(type: typeNode("String"))
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),
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FieldDefinition(name: nameNode("reason"), type: typeNode("String")),
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FieldDefinition(name: nameNode("createdBy"), type: typeNode("User")),
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]
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)
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let productVariationObjectTypeDefinition = ObjectTypeDefinition(
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name: nameNode("ProductVariation"),
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fields: [
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FieldDefinition(name: nameNode("id"), type: NonNullType(type: typeNode("ID"))),
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]
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)
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let productResearchObjectTypeDefinition = ObjectTypeDefinition(
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name: nameNode("ProductResearch"),
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directives: [
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Directive(name: nameNode("key"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(value: "study { caseNumber }", block: false)
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),
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]),
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],
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fields: [
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FieldDefinition(
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name: nameNode("study"),
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type: NonNullType(type: typeNode("CaseStudy"))
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),
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FieldDefinition(name: nameNode("outcome"), type: typeNode("String")),
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]
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)
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let caseStudyObjectTypeDefinition = ObjectTypeDefinition(
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name: nameNode("CaseStudy"),
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fields: [
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FieldDefinition(
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name: nameNode("caseNumber"),
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type: NonNullType(type: typeNode("ID"))
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),
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FieldDefinition(name: nameNode("description"), type: typeNode("String")),
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]
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)
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let productDimensionObjectTypeDefinition = ObjectTypeDefinition(
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name: nameNode("ProductDimension"),
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directives: [
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Directive(name: nameNode("shareable")),
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],
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fields: [
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FieldDefinition(name: nameNode("size"), type: typeNode("String")),
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FieldDefinition(name: nameNode("weight"), type: typeNode("Float")),
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FieldDefinition(name: nameNode("unit"), type: typeNode("String"), directives: [
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Directive(name: nameNode("inaccessible")),
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]),
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]
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)
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let queryExtensionObjectTypeDefinition =
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TypeExtensionDefinition(definition: ObjectTypeDefinition(
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name: nameNode("Query"),
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fields: [
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FieldDefinition(name: nameNode("product"), arguments: [
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InputValueDefinition(
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name: nameNode("id"),
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type: NonNullType(type: NamedType(name: nameNode("ID")))
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),
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], type: typeNode("Product")),
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FieldDefinition(name: nameNode("deprecatedProduct"), arguments: [
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InputValueDefinition(
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name: nameNode("sku"),
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type: NonNullType(type: NamedType(name: nameNode("String")))
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),
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InputValueDefinition(
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name: nameNode("package"),
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type: NonNullType(type: NamedType(name: nameNode("String")))
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),
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], type: typeNode("DeprecatedProduct"), directives: [
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Directive(name: nameNode("deprecated"), arguments: [
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Argument(
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name: nameNode("reason"),
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value: StringValue(value: "Use product query instead", block: false)
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),
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]),
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]),
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]
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))
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let userExtensionObjectTypeDefinition =
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TypeExtensionDefinition(definition: ObjectTypeDefinition(
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name: nameNode("User"),
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directives: [
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Directive(name: nameNode("key"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(value: "email", block: false)
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),
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]),
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],
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fields: [
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FieldDefinition(
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name: nameNode("averageProductsCreatedPerYear"),
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type: typeNode("Int"),
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directives: [
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Directive(name: nameNode("requires"), arguments: [
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Argument(
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name: nameNode("fields"),
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value: StringValue(
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value: "totalProductsCreated yearsOfEmployment",
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block: false
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)
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),
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]),
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]
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),
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FieldDefinition(
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name: nameNode("email"),
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type: NonNullType(type: NamedType(name: nameNode("ID"))),
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directives: [
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Directive(name: nameNode("external")),
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]
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),
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FieldDefinition(name: nameNode("name"), type: typeNode("String"), directives: [
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Directive(name: nameNode("override"), arguments: [
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Argument(
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name: nameNode("from"),
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value: StringValue(value: "users", block: false)
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),
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]),
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]),
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FieldDefinition(
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name: nameNode("totalProductsCreated"),
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type: typeNode("Int"),
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directives: [
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Directive(name: nameNode("external")),
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]
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),
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FieldDefinition(
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name: nameNode("yearsOfEmployment"),
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type: NonNullType(type: typeNode("Int")),
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directives: [
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Directive(name: nameNode("external")),
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]
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),
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]
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))
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let expected = Document(definitions: [
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schemaExtensionDefinition,
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productObjectTypeDefinition,
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deprecatedProductObjectTypeDefinition,
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productVariationObjectTypeDefinition,
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productResearchObjectTypeDefinition,
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caseStudyObjectTypeDefinition,
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productDimensionObjectTypeDefinition,
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queryExtensionObjectTypeDefinition,
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userExtensionObjectTypeDefinition,
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])
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let result = try parse(source: source)
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XCTAssert(result == expected)
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}
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}

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