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[ddc] Add library URIs to cast failure messages

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When the two types have the same name but are from different libraries
showing the library URI will help users understand the failure better.

Change-Id: I5ab4412e676272111d41f688ef2d1cc83afbe627
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/194116
Reviewed-by: Mark Zhou <markzipan@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>
This commit is contained in:
Nicholas Shahan 2021-04-09 22:24:43 +00:00 committed by commit-bot@chromium.org
parent 0b175ed534
commit 4e25e499c8
7 changed files with 156 additions and 2 deletions
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19
sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart
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@ -102,8 +102,23 @@ String _castErrorMessage(from, to) {
// }
// }
// }
return "Expected a value of type '${typeName(to)}', "
"but got one of type '${typeName(from)}'";
var fromName = "'${typeName(from)}'";
var toName = "'${typeName(to)}'";
var toType = to;
if (_jsInstanceOf(to, NullableType) || _jsInstanceOf(to, LegacyType)) {
toType = to.type;
}
var fromType = from;
if (_jsInstanceOf(from, NullableType) || _jsInstanceOf(from, LegacyType)) {
fromType = from.type;
}
if (typeName(fromType) == typeName(toType)) {
fromName += ' (in ${getLibraryUri(fromType)})';
toName += ' (in ${getLibraryUri(toType)})';
}
return 'Expected a value of type $toName, but got one of type $fromName';
}
/// The symbol that references the thrown Dart Object (typically but not

5
tests/dartdevc/cast_error/lib_a.dart Normal file
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@ -0,0 +1,5 @@
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
class Animal {}

5
tests/dartdevc/cast_error/lib_b.dart Normal file
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@ -0,0 +1,5 @@
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
class Animal {}

66
tests/dartdevc/cast_error/library_uri_in_message_test.dart Normal file
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@ -0,0 +1,66 @@
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import "../utils.dart";
import "lib_a.dart" as libA;
import "lib_b.dart" as libB;
void main() {
// When the name of the class is the same the error message should include
// library URIs for the two classes.
var a = libA.Animal();
try {
a as libB.Animal;
} on TypeError catch (error) {
var message = error.toString();
expectStringContains(
"Expected a value of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc/cast_error/lib_b.dart)",
message);
expectStringContains(
"but got one of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc/cast_error/lib_a.dart)",
message);
}
// Verify the libraries are properly ordered.
var b = libB.Animal();
try {
b as libA.Animal;
} on TypeError catch (error) {
var message = error.toString();
expectStringContains(
"Expected a value of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc/cast_error/lib_a.dart)",
message);
expectStringContains(
"but got one of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc/cast_error/lib_b.dart)",
message);
}
// Shows library URIs when one of the types is nullable.
try {
b as libA.Animal?;
} on TypeError catch (error) {
var message = error.toString();
expectStringContains(
"Expected a value of type 'Animal?' "
"(in org-dartlang-app:/tests/dartdevc/cast_error/lib_a.dart)",
message);
expectStringContains(
"but got one of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc/cast_error/lib_b.dart)",
message);
}
// URIs are not displayed when the class names are different.
try {
a as String;
} on TypeError catch (error) {
var message = error.toString();
expectStringContains(
"Expected a value of type 'String', but got one of type 'Animal'",
message);
}
}

5
tests/dartdevc_2/cast_error/lib_a.dart Normal file
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@ -0,0 +1,5 @@
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
class Animal {}

5
tests/dartdevc_2/cast_error/lib_b.dart Normal file
View file

@ -0,0 +1,5 @@
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
class Animal {}

53
tests/dartdevc_2/cast_error/library_uri_in_message_test.dart Normal file
View file

@ -0,0 +1,53 @@
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.9
import "../utils.dart";
import "lib_a.dart" as libA;
import "lib_b.dart" as libB;
void main() {
// When the name of the class is the same the error message should include
// library URIs for the two classes.
var a = libA.Animal();
try {
a as libB.Animal;
} on TypeError catch (error) {
var message = error.toString();
expectStringContains(
"Expected a value of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc_2/cast_error/lib_b.dart)",
message);
expectStringContains(
"but got one of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc_2/cast_error/lib_a.dart)",
message);
}
// Verify the libraries are properly ordered.
var b = libB.Animal();
try {
b as libA.Animal;
} on TypeError catch (error) {
var message = error.toString();
expectStringContains(
"Expected a value of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc_2/cast_error/lib_a.dart)",
message);
expectStringContains(
"but got one of type 'Animal' "
"(in org-dartlang-app:/tests/dartdevc_2/cast_error/lib_b.dart)",
message);
}
// URIs are not displayed when the class names are different.
try {
a as String;
} on TypeError catch (error) {
var message = error.toString();
expectStringContains(
"Expected a value of type 'String', but got one of type 'Animal'",
message);
}
}