Include Relay resolver import type when field is selected on query as…

… well

compiler/crates/relay-typegen/src/write.rs

@@ -188,10 +188,9 @@ pub(crate) fn write_operation_type_exports_section(
     if custom_error_import.is_some() {
         write_import_custom_type(custom_error_import, writer)?;
     }
-    // TODO: Add proper support for Resolver type generation in typescript: https://github.com/facebook/relay/issues/4772
-    if typegen_context.project_config.typegen_config.language == TypegenLanguage::Flow {
-        write_relay_resolver_imports(imported_resolvers, writer)?;
-    }
+
+    write_relay_resolver_imports(imported_resolvers, writer)?;
+
     write_split_raw_response_type_imports(typegen_context, imported_raw_response_types, writer)?;
 
     let mut input_object_types = IndexMap::default();

compiler/crates/relay-typegen/tests/generate_typescript/fixtures/relay-resolver-on-query-with-output-type.expected

@@ -0,0 +1,73 @@
+==================================== INPUT ====================================
+query Foo_user @raw_response_type {
+  me {
+    pop_star_name
+  }
+
+}
+
+fragment PopStarNameResolverFragment_name on User {
+  name
+  address {
+    street
+  }
+  parents {
+    lastName
+  }
+}
+
+# %extensions%
+
+extend type User {
+  pop_star_name: RelayResolverValue @relay_resolver(fragment_name: "PopStarNameResolverFragment_name", import_path: "PopStarNameResolver", has_output_type: true)
+}
+==================================== OUTPUT ===================================
+import { FragmentRefs } from "relay-runtime";
+import userPopStarNameResolverType from "PopStarNameResolver";
+// Type assertion validating that `userPopStarNameResolverType` resolver is correctly implemented.
+// A type error here indicates that the type signature of the resolver module is incorrect.
+(userPopStarNameResolverType satisfies (
+  rootKey: PopStarNameResolverFragment_name$key,
+) => unknown | null | undefined);
+export type Foo_user$variables = Record<PropertyKey, never>;
+export type Foo_user$data = {
+  readonly me: {
+    readonly pop_star_name: ReturnType<typeof userPopStarNameResolverType> | null | undefined;
+  } | null | undefined;
+};
+export type Foo_user$rawResponse = {
+  readonly me: {
+    readonly address: {
+      readonly street: string | null | undefined;
+    } | null | undefined;
+    readonly id: string;
+    readonly name: string | null | undefined;
+    readonly parents: ReadonlyArray<{
+      readonly id: string;
+      readonly lastName: string | null | undefined;
+    }>;
+  } | {
+    readonly id: string;
+  } | null | undefined;
+};
+export type Foo_user = {
+  rawResponse: Foo_user$rawResponse;
+  response: Foo_user$data;
+  variables: Foo_user$variables;
+};
+-------------------------------------------------------------------------------
+import { FragmentRefs } from "relay-runtime";
+export type PopStarNameResolverFragment_name$data = {
+  readonly address: {
+    readonly street: string | null | undefined;
+  } | null | undefined;
+  readonly name: string | null | undefined;
+  readonly parents: ReadonlyArray<{
+    readonly lastName: string | null | undefined;
+  }>;
+  readonly " $fragmentType": "PopStarNameResolverFragment_name";
+};
+export type PopStarNameResolverFragment_name$key = {
+  readonly " $data"?: PopStarNameResolverFragment_name$data;
+  readonly " $fragmentSpreads": FragmentRefs<"PopStarNameResolverFragment_name">;
+};

compiler/crates/relay-typegen/tests/generate_typescript/fixtures/relay-resolver-on-query-with-output-type.graphql

@@ -0,0 +1,22 @@
+query Foo_user @raw_response_type {
+  me {
+    pop_star_name
+  }
+
+}
+
+fragment PopStarNameResolverFragment_name on User {
+  name
+  address {
+    street
+  }
+  parents {
+    lastName
+  }
+}
+
+# %extensions%
+
+extend type User {
+  pop_star_name: RelayResolverValue @relay_resolver(fragment_name: "PopStarNameResolverFragment_name", import_path: "PopStarNameResolver", has_output_type: true)
+}

compiler/crates/relay-typegen/tests/generate_typescript_test.rs

@@ -334,6 +334,13 @@ async fn relay_client_id_field() {
     test_fixture(transform_fixture, file!(), "relay-client-id-field.graphql", "generate_typescript/fixtures/relay-client-id-field.expected", input, expected).await;
 }
 
+#[tokio::test]
+async fn relay_resolver_on_query_with_output_type() {
+    let input = include_str!("generate_typescript/fixtures/relay-resolver-on-query-with-output-type.graphql");
+    let expected = include_str!("generate_typescript/fixtures/relay-resolver-on-query-with-output-type.expected");
+    test_fixture(transform_fixture, file!(), "relay-resolver-on-query-with-output-type.graphql", "generate_typescript/fixtures/relay-resolver-on-query-with-output-type.expected", input, expected).await;
+}
+
 #[tokio::test]
 async fn relay_resolver_with_output_type_client_interface() {
     let input = include_str!("generate_typescript/fixtures/relay-resolver-with-output-type-client-interface.graphql");