Add 'const' modifier to enum constructor in tests.

Change-Id: I8b743d3e5fb581d0626d53e9c2a8b918dc719104
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/230381
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

Author: scheglov

pkg/analyzer/test/src/dart/resolution/enum_test.dart

@@ -19,7 +19,7 @@ class EnumDriverResolutionTest extends PubPackageResolutionTest {
     await assertNoErrorsInCode(r'''
 enum E {
   v([]);
-  E(List<int> a);
+  const E(List<int> a);
 }
 ''');
 
@@ -30,7 +30,7 @@ enum E {
     await assertNoErrorsInCode(r'''
 enum E {
   v(<void Function(double)>[]);
-  E(Object a);
+  const E(Object a);
 }
 ''');
 
@@ -50,7 +50,7 @@ enum E {
     await assertNoErrorsInCode(r'''
 enum E<T> {
   v.named(42);
-  E.named(T a);
+  const E.named(T a);
 }
 ''');
 
@@ -76,7 +76,7 @@ enum E<T> {
     await assertNoErrorsInCode(r'''
 enum E<T> {
   v(42);
-  E(T a);
+  const E(T a);
 }
 ''');
 
@@ -102,7 +102,7 @@ enum E<T> {
     await assertNoErrorsInCode(r'''
 enum E<T> {
   v<double>.named(42);
-  E.named(T a);
+  const E.named(T a);
 }
 ''');
 
@@ -134,7 +134,7 @@ enum E<T> {
     await assertNoErrorsInCode(r'''
 enum E {
   v.named(42);
-  E.named(int a);
+  const E.named(int a);
 }
 ''');
 
@@ -154,7 +154,7 @@ enum E {
     await assertNoErrorsInCode(r'''
 enum E {
   v(42);
-  E(int a);
+  const E(int a);
 }
 ''');
 
@@ -188,7 +188,7 @@ enum E {
     await assertNoErrorsInCode(r'''
 enum E {
   v.named(42);
-  E(int a);
+  const E(int a);
 }
 ''');
 
@@ -205,7 +205,7 @@ enum E {
     await assertNoErrorsInCode(r'''
 enum E {
   v(42);
-  E.named(int a);
+  const E.named(int a);
 }
 ''');
 

pkg/analyzer/test/src/summary/resynthesize_common.dart

@@ -17539,7 +17539,7 @@ library
     var library = await checkLibrary(r'''
 enum E<T> {
   int(1), string('2');
-  E(T a);
+  const E(T a);
 }
 ''');
     checkElementText(library, r'''
@@ -17640,15 +17640,15 @@ library
           synthetic final _name @-1
             type: String
         constructors
-          @37
+          const @43
             parameters
               requiredPositional final this.index @-1
                 type: int
                 field: self::@enum::E::@field::index
               requiredPositional final this._name @-1
                 type: String
                 field: self::@enum::E::@field::_name
-              requiredPositional a @41
+              requiredPositional a @47
                 type: T
         accessors
           synthetic static get int @-1
@@ -17752,7 +17752,7 @@ library
     var library = await checkLibrary(r'''
 enum E<T> {
   v<double>(42);
-  E(T a);
+  const E(T a);
 }
 ''');
     checkElementText(library, r'''
@@ -17826,15 +17826,15 @@ library
           synthetic final _name @-1
             type: String
         constructors
-          @31
+          const @37
             parameters
               requiredPositional final this.index @-1
                 type: int
                 field: self::@enum::E::@field::index
               requiredPositional final this._name @-1
                 type: String
                 field: self::@enum::E::@field::_name
-              requiredPositional a @35
+              requiredPositional a @41
                 type: T
         accessors
           synthetic static get v @-1
@@ -17935,7 +17935,7 @@ library
     var library = await checkLibrary(r'''
 enum E {
   v.named(42);
-  E.named(int a);
+  const E.named(int a);
 }
 ''');
     checkElementText(library, r'''
@@ -17992,17 +17992,17 @@ library
           synthetic final _name @-1
             type: String
         constructors
-          named @28
-            periodOffset: 27
-            nameEnd: 33
+          const named @34
+            periodOffset: 33
+            nameEnd: 39
             parameters
               requiredPositional final this.index @-1
                 type: int
                 field: self::@enum::E::@field::index
               requiredPositional final this._name @-1
                 type: String
                 field: self::@enum::E::@field::_name
-              requiredPositional a @38
+              requiredPositional a @44
                 type: int
         accessors
           synthetic static get v @-1
@@ -18023,7 +18023,7 @@ library
     var library = await checkLibrary(r'''
 enum E {
   v(42);
-  E(int a);
+  const E(int a);
 }
 ''');
     checkElementText(library, r'''
@@ -18080,15 +18080,15 @@ library
           synthetic final _name @-1
             type: String
         constructors
-          @20
+          const @26
             parameters
               requiredPositional final this.index @-1
                 type: int
                 field: self::@enum::E::@field::index
               requiredPositional final this._name @-1
                 type: String
                 field: self::@enum::E::@field::_name
-              requiredPositional a @26
+              requiredPositional a @32
                 type: int
         accessors
           synthetic static get v @-1