fix: don't extract field types of extract input types

Author: jedwards1211

src/internal/generateFlowTypesFromDocument.ts

@@ -979,8 +979,9 @@ export default function generateFlowTypesFromDocument({
     config: ConfigDirectives
   ): FlowTypeKind {
     config = getCombinedConfig(type.config, config)
+    const fieldConfig = { ...config, extract: undefined }
     return objectTypeAnnotation(
-      map(type.inputFields, field => convertInputField(field, config)),
+      map(type.inputFields, field => convertInputField(field, fieldConfig)),
       config
     )
   }

starwars.graphql

@@ -22,6 +22,7 @@ type Query {
 # The mutation type, represents all updates we can make to our data
 type Mutation {
   createReview(episode: Episode, review: ReviewInput!): Review
+  testExtractInput(input: TestExtractInput!): Boolean
 }
 # The subscription type, represents all subscriptions we can make to our data
 type Subscription {
@@ -151,3 +152,12 @@ type Starship {
   coordinates: [[Float!]!]
 }
 union SearchResult = Human | Droid | Starship
+
+scalar JSON
+
+input TestExtractInput {
+  foo: String!
+  bar: Int!
+  date: Date
+  json: JSON
+}

test/graphql-typegen-async/mutationExtractInput.ts

@@ -0,0 +1,47 @@
+import * as path from 'path'
+
+export const file = 'file.js'
+
+export const input = `
+// @flow
+import gql from 'graphql-tag'
+
+const mutation = gql\`
+mutation testExtractInput(
+  # @graphql-typegen extract
+  $input: TestExtractInput!
+) {
+  testExtractInput(input: $input)
+}
+\`
+`
+
+export const options = {
+  addTypename: false,
+  schemaFile: path.resolve(__dirname, '../../starwars.graphql'),
+}
+
+export const expected = `
+// @flow
+import gql from 'graphql-tag'
+import { type DateISOString } from '../../src/DateISOString'
+const mutation = gql\`
+mutation testExtractInput(
+  # @graphql-typegen extract
+  $input: TestExtractInput!
+) {
+  testExtractInput(input: $input)
+}
+\`
+// @graphql-typegen auto-generated
+type TestExtractInputMutationVariables = { input: TestExtractInput }
+// @graphql-typegen auto-generated
+type TestExtractInput = {
+  foo: string,
+  bar: number,
+  date?: ?DateISOString,
+  json?: ?mixed,
+}
+// @graphql-typegen auto-generated
+type TestExtractInputMutationData = { testExtractInput: ?boolean }
+`