A missing enum case in a switch is a warning, not a compile-time error.

pkg/analyzer/test/generated/compile_time_error_code_test.dart

Index: pkg/analyzer/test/generated/compile_time_error_code_test.dart
diff --git a/pkg/analyzer/test/generated/compile_time_error_code_test.dart b/pkg/analyzer/test/generated/compile_time_error_code_test.dart
index 15ef8ad9fd9f8a0e3da15cd6948d0fe0e11df4d8..9c4f87c851354d93be77986d8ac4b3e51f255c45 100644
--- a/pkg/analyzer/test/generated/compile_time_error_code_test.dart
+++ b/pkg/analyzer/test/generated/compile_time_error_code_test.dart
@@ -3547,24 +3547,6 @@ class A {
     verify([source]);
   }
 
-  void test_missingEnumConstantInSwitch() {
-    Source source = addSource(r'''
-enum E { ONE, TWO, THREE, FOUR }
-bool odd(E e) {
-  switch (e) {
-    case E.ONE:
-    case E.THREE: return true;
-  }
-  return false;
-}''');
-    computeLibrarySourceErrors(source);
-    assertErrors(source, [
-      CompileTimeErrorCode.MISSING_ENUM_CONSTANT_IN_SWITCH,
-      CompileTimeErrorCode.MISSING_ENUM_CONSTANT_IN_SWITCH
-    ]);
-    verify([source]);
-  }
-
   void test_mixinDeclaresConstructor_classDeclaration() {
     Source source = addSource(r'''
 class A {