Split error code to ease future improvements

pkg/analyzer/test/generated/static_warning_code_test.dart

Index: pkg/analyzer/test/generated/static_warning_code_test.dart
diff --git a/pkg/analyzer/test/generated/static_warning_code_test.dart b/pkg/analyzer/test/generated/static_warning_code_test.dart
index c808b49ec12e0c75d4f42e1d73e1f764bdf345e6..b6aecefafddd634ebadb3be7ca727b94d563c04d 100644
--- a/pkg/analyzer/test/generated/static_warning_code_test.dart
+++ b/pkg/analyzer/test/generated/static_warning_code_test.dart
@@ -1328,6 +1328,29 @@ main() {
     verify([source]);
   }
 
+  test_extraPositionalArgumentsCouldBeNamed() async {
+    Source source = addSource(r'''
+f({x, y}) {}
+main() {
+  f(0, 1, '2');
+}''');
+    await computeAnalysisResult(source);
+    assertErrors(
+        source, [StaticWarningCode.EXTRA_POSITIONAL_ARGUMENTS_COULD_BE_NAMED]);
+    verify([source]);
+  }
+
+  test_extraPositionalArgumentsCouldBeNamed_functionExpression() async {
+    Source source = addSource(r'''
+main() {
+  (int x, {int y}) {} (0, 1);
+}''');
+    await computeAnalysisResult(source);
+    assertErrors(
+        source, [StaticWarningCode.EXTRA_POSITIONAL_ARGUMENTS_COULD_BE_NAMED]);
+    verify([source]);
+  }
+
   test_fieldInitializedInInitializerAndDeclaration_final() async {
     Source source = addSource(r'''
 class A {
@@ -3062,16 +3085,6 @@ class B {
     verify([source]);
   }
 
-  test_returnWithoutValue_Null() async {
-    // Test that block bodied functions with return type Null and an empty
-    // return cause a static warning.
-    Source source = addSource(r'''
-Null f() {return;}
-''');
-    await computeAnalysisResult(source);
-    assertErrors(source, [StaticWarningCode.RETURN_WITHOUT_VALUE]);
-  }
-
   test_returnWithoutValue_async() async {
     Source source = addSource('''
 import 'dart:async';
@@ -3120,6 +3133,16 @@ int f(int x) {
     verify([source]);
   }
 
+  test_returnWithoutValue_Null() async {
+    // Test that block bodied functions with return type Null and an empty
+    // return cause a static warning.
+    Source source = addSource(r'''
+Null f() {return;}
+''');
+    await computeAnalysisResult(source);
+    assertErrors(source, [StaticWarningCode.RETURN_WITHOUT_VALUE]);
+  }
+
   test_staticAccessToInstanceMember_method_invocation() async {
     Source source = addSource(r'''
 class A {