Add test cases for #1551

Author: kimdv

Tests/SwiftSyntaxBuilderTest/ClosureExprTests.swift

@@ -34,4 +34,27 @@ final class ClosureExprTests: XCTestCase {
       """
     )
   }
+  func testClosureExprWithAsync() {
+    let buildable = ClosureExprSyntax(
+      signature: ClosureSignatureSyntax(
+        input: .simpleInput(
+          ClosureParamListSyntax {
+            ClosureParamSyntax(name: .identifier("area"))
+          }
+        ),
+        effectSpecifiers: TypeEffectSpecifiersSyntax(
+          asyncSpecifier: .keyword(.async),
+          throwsSpecifier: .keyword(.throws)
+        )
+      )
+    ) {}
+
+    assertBuildResult(
+      buildable,
+      """
+      {area async throws in
+      }
+      """
+    )
+  }
 }

Tests/SwiftSyntaxBuilderTest/FunctionSignatureSyntaxTests.swift

@@ -0,0 +1,29 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+import XCTest
+import SwiftSyntax
+import SwiftSyntaxBuilder
+
+final class FunctionSignatureSyntaxTests: XCTestCase {
+  func testFunctionEffectSpecifiersSyntax() throws {
+    let functionEffects = FunctionEffectSpecifiersSyntax(asyncSpecifier: .keyword(.async), throwsSpecifier: .keyword(.rethrows))
+    let buildable = FunctionSignatureSyntax(input: .init(parameterList: []), effectSpecifiers: functionEffects, output: .init(returnType: TypeSyntax("String")))
+
+    assertBuildResult(
+      buildable,
+      """
+      () async rethrows -> String
+      """
+    )
+  }
+}

Tests/SwiftSyntaxBuilderTest/FunctionTypeSyntaxTests.swift

@@ -0,0 +1,29 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+import XCTest
+import SwiftSyntax
+import SwiftSyntaxBuilder
+
+final class FunctionTypeSyntaxTests: XCTestCase {
+  func testFunctionEffectSpecifiersSyntax() throws {
+    let typeEffects = TypeEffectSpecifiersSyntax(asyncSpecifier: .keyword(.async), throwsSpecifier: .keyword(.throws))
+    let buildable = FunctionTypeSyntax(arguments: [], effectSpecifiers: typeEffects, output: .init(returnType: TypeSyntax("String")))
+
+    assertBuildResult(
+      buildable,
+      """
+      () async throws -> String
+      """
+    )
+  }
+}

Tests/SwiftSyntaxBuilderTest/VariableTests.swift

@@ -293,6 +293,28 @@ final class VariableTests: XCTestCase {
     )
   }
 
+  func testAccessorWithEffectSpecifier() throws {
+    let buildable = try VariableDeclSyntax("var test: Int") {
+      AccessorDeclSyntax(
+        accessorKind: .keyword(.get),
+        effectSpecifiers: AccessorEffectSpecifiersSyntax(
+          asyncSpecifier: .keyword(.async),
+          throwsSpecifier: .keyword(.throws)
+        )
+      ) {}
+    }
+
+    assertBuildResult(
+      buildable,
+      """
+      var test: Int {
+          get async throws {
+          }
+      }
+      """
+    )
+  }
+
   func testAttributedVariables() throws {
     let testCases: [UInt: (VariableDeclSyntax, String)] = try [
       #line: (