Fixes #1595. Expect TypeError in place of NullThrownError in co19_2 tests (#1597)

Authored by @sgrekhov.

Author: sgrekhov

Language/Expressions/Throw/evaluation_t01.dart

@@ -7,7 +7,7 @@
 /// @assertion Evaluation of a throw expression of the form throw e; proceeds as
 /// follows:
 /// The expression e is evaluated yielding a value v.
-/// If v evaluates to null, then a NullThrownError is thrown. Otherwise, control
+/// If v evaluates to null, then a TypeError is thrown. Otherwise, control
 /// is transferred to the nearest dynamically enclosing exception handler, with
 /// the current exception set to v and the current return value becomes
 /// undefined.

Language/Expressions/Throw/evaluation_t02.dart

@@ -7,7 +7,7 @@
 /// @assertion Evaluation of a throw expression of the form throw e; proceeds as
 /// follows:
 /// The expression e is evaluated yielding a value v.
-/// If v evaluates to null, then a NullThrownError is thrown. Otherwise, control
+/// If v evaluates to null, then a TypeError is thrown. Otherwise, control
 /// is transferred to the nearest dynamically enclosing exception handler, with
 /// the current exception set to v and the current return value becomes
 /// undefined.

Language/Expressions/Throw/evaluation_t03.dart

@@ -7,7 +7,7 @@
 /// @assertion Evaluation of a throw expression of the form throw e; proceeds as
 /// follows:
 /// The expression e is evaluated yielding a value v.
-/// If v evaluates to null, then a NullThrownError is thrown. Otherwise, control
+/// If v evaluates to null, then a TypeError is thrown. Otherwise, control
 /// is transferred to the nearest dynamically enclosing exception handler, with
 /// the current exception set to v and the current return value becomes
 /// undefined.

Language/Expressions/Throw/evaluation_t04.dart

@@ -7,12 +7,12 @@
 /// @assertion Evaluation of a throw expression of the form throw e; proceeds as
 /// follows:
 /// The expression e is evaluated yielding a value v.
-/// If v evaluates to null, then a NullThrownError is thrown. Otherwise, control
+/// If v evaluates to null, then a TypeError is thrown. Otherwise, control
 /// is transferred to the nearest dynamically enclosing exception handler, with
 /// the current exception set to v and the current return value becomes
 /// undefined.
 /// @description Checks that attempting to throw null in any manner results in
-/// NullThrownError being thrown instead.
+/// TypeError being thrown instead.
 /// @author rodionov
 /// @reviewer kaigorodov
 
@@ -27,21 +27,21 @@ n2() {}
 main() {
   try {
     throw null;
-    Expect.fail("NullThrownError expected.");
-  } on NullThrownError catch (ok) {}
+    Expect.fail("TypeError expected.");
+  } on TypeError catch (ok) {}
 
   try {
     throw n();
-    Expect.fail("NullThrownError expected.");
-  } on NullThrownError catch (ok) {}
+    Expect.fail("TypeError expected.");
+  } on TypeError catch (ok) {}
 
   try {
     throw n2();
-    Expect.fail("NullThrownError expected.");
-  } on NullThrownError catch (ok) {}
+    Expect.fail("TypeError expected.");
+  } on TypeError catch (ok) {}
 
   try {
     throw (true ? null : null);
-    Expect.fail("NullThrownError expected.");
-  } on NullThrownError catch (ok) {}
+    Expect.fail("TypeError expected.");
+  } on TypeError catch (ok) {}
 }

Language/Expressions/Throw/evaluation_t05.dart

@@ -7,7 +7,7 @@
 /// @assertion Evaluation of a throw expression of the form throw e; proceeds as
 /// follows:
 /// The expression e is evaluated yielding a value v.
-/// If v evaluates to null, then a NullThrownError is thrown. Otherwise, control
+/// If v evaluates to null, then a TypeError is thrown. Otherwise, control
 /// is transferred to the nearest dynamically enclosing exception handler, with
 /// the current exception set to v and the current return value becomes
 /// undefined.

LibTest/async/Future/Future.error_A01_t01.dart

@@ -20,7 +20,7 @@ check(value) {
   new Future.error(value)
     .catchError((error) {
       if (value == null) {
-        Expect.isTrue(error is NullThrownError);
+        Expect.isTrue(error is TypeError);
       } else {
         Expect.identical(value, error);
       }

LibTest/async/Future/Future.sync_A01_t03.dart

@@ -28,8 +28,8 @@ check(value) {
       Expect.fail("Created future should complete with error");
     },
     onError: (e) {
-      if (value==null){
-        Expect.isTrue(e is NullThrownError);
+      if (value == null){
+        Expect.isTrue(e is TypeError);
       } else {
         Expect.identical(value, e);
       }

Utils/tests/Expect/throws_A01_t03.dart

@@ -43,7 +43,7 @@ main() {
   check(badboy2, (e) => false);
 
   Expect.throws(badboy3);
-  Expect.throws(badboy3, (e) => e is NullThrownError, "");
+  Expect.throws(badboy3, (e) => e is TypeError, "");
   check(badboy3, (e) => false, "not empty");
 }