From 72a04117769a740acea8add41a678023dd0448c2 Mon Sep 17 00:00:00 2001
From: Alexander T <alexander.tarasyuk@outlook.com>
Date: Thu, 2 Apr 2020 18:30:05 +0300
Subject: [PATCH] fix(37431): allow only one space between async keyword and
 method name (#37504)

---
 src/services/formatting/rules.ts                 |  2 +-
 tests/cases/fourslash/formatAsyncClassMethod1.ts | 12 ++++++++++++
 tests/cases/fourslash/formatAsyncClassMethod2.ts | 12 ++++++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/formatAsyncClassMethod1.ts
 create mode 100644 tests/cases/fourslash/formatAsyncClassMethod2.ts

diff --git a/src/services/formatting/rules.ts b/src/services/formatting/rules.ts
index d5db98a1d30..4d6eb8f7a99 100644
--- a/src/services/formatting/rules.ts
+++ b/src/services/formatting/rules.ts
@@ -129,7 +129,7 @@ namespace ts.formatting {
 
             // Async-await
             rule("SpaceBetweenAsyncAndOpenParen", SyntaxKind.AsyncKeyword, SyntaxKind.OpenParenToken, [isArrowFunctionContext, isNonJsxSameLineTokenContext], RuleAction.InsertSpace),
-            rule("SpaceBetweenAsyncAndFunctionKeyword", SyntaxKind.AsyncKeyword, SyntaxKind.FunctionKeyword, [isNonJsxSameLineTokenContext], RuleAction.InsertSpace),
+            rule("SpaceBetweenAsyncAndFunctionKeyword", SyntaxKind.AsyncKeyword, [SyntaxKind.FunctionKeyword, SyntaxKind.Identifier], [isNonJsxSameLineTokenContext], RuleAction.InsertSpace),
 
             // Template string
             rule("NoSpaceBetweenTagAndTemplateString", [SyntaxKind.Identifier, SyntaxKind.CloseParenToken], [SyntaxKind.NoSubstitutionTemplateLiteral, SyntaxKind.TemplateHead], [isNonJsxSameLineTokenContext], RuleAction.DeleteSpace),
diff --git a/tests/cases/fourslash/formatAsyncClassMethod1.ts b/tests/cases/fourslash/formatAsyncClassMethod1.ts
new file mode 100644
index 00000000000..b120a8c771e
--- /dev/null
+++ b/tests/cases/fourslash/formatAsyncClassMethod1.ts
@@ -0,0 +1,12 @@
+///<reference path="fourslash.ts"/>
+
+////class Foo {
+////    async     foo() {}
+////}
+
+format.document();
+verify.currentFileContentIs(
+`class Foo {
+    async foo() { }
+}`
+);
diff --git a/tests/cases/fourslash/formatAsyncClassMethod2.ts b/tests/cases/fourslash/formatAsyncClassMethod2.ts
new file mode 100644
index 00000000000..6901778b0a6
--- /dev/null
+++ b/tests/cases/fourslash/formatAsyncClassMethod2.ts
@@ -0,0 +1,12 @@
+///<reference path="fourslash.ts"/>
+
+////class Foo {
+////    private    async     foo() {}
+////}
+
+format.document();
+verify.currentFileContentIs(
+`class Foo {
+    private async foo() { }
+}`
+);