Add observatory_pub_packages snapshot to third_party

observatory_pub_packages/matcher/src/error_matchers.dart

Index: observatory_pub_packages/matcher/src/error_matchers.dart
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--- observatory_pub_packages/matcher/src/error_matchers.dart	(revision 0)
+++ observatory_pub_packages/matcher/src/error_matchers.dart	(working copy)
@@ -0,0 +1,102 @@
+// Copyright (c) 2012, 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.
+
+library matcher.error_matchers;
+
+import 'core_matchers.dart';
+import 'interfaces.dart';
+
+/// A matcher for ArgumentErrors.
+const Matcher isArgumentError = const _ArgumentError();
+
+class _ArgumentError extends TypeMatcher {
+  const _ArgumentError(): super("ArgumentError");
+  bool matches(item, Map matchState) => item is ArgumentError;
+}
+
+/// A matcher for ConcurrentModificationError.
+const Matcher isConcurrentModificationError =
+    const _ConcurrentModificationError();
+
+class _ConcurrentModificationError extends TypeMatcher {
+  const _ConcurrentModificationError(): super("ConcurrentModificationError");
+  bool matches(item, Map matchState) => item is ConcurrentModificationError;
+}
+
+/// A matcher for CyclicInitializationError.
+const Matcher isCyclicInitializationError = const _CyclicInitializationError();
+
+class _CyclicInitializationError extends TypeMatcher {
+  const _CyclicInitializationError(): super("CyclicInitializationError");
+  bool matches(item, Map matchState) => item is CyclicInitializationError;
+}
+
+/// A matcher for Exceptions.
+const Matcher isException = const _Exception();
+
+class _Exception extends TypeMatcher {
+  const _Exception(): super("Exception");
+  bool matches(item, Map matchState) => item is Exception;
+}
+
+class _FallThroughError extends TypeMatcher {
+  const _FallThroughError(): super("FallThroughError");
+  bool matches(item, Map matchState) => item is FallThroughError;
+}
+
+/// A matcher for FormatExceptions.
+const Matcher isFormatException = const _FormatException();
+
+class _FormatException extends TypeMatcher {
+  const _FormatException(): super("FormatException");
+  bool matches(item, Map matchState) => item is FormatException;
+}
+
+/// A matcher for NoSuchMethodErrors.
+const Matcher isNoSuchMethodError = const _NoSuchMethodError();
+
+class _NoSuchMethodError extends TypeMatcher {
+  const _NoSuchMethodError(): super("NoSuchMethodError");
+  bool matches(item, Map matchState) => item is NoSuchMethodError;
+}
+
+/// A matcher for NullThrownError.
+const Matcher isNullThrownError = const _NullThrownError();
+
+class _NullThrownError extends TypeMatcher {
+  const _NullThrownError(): super("NullThrownError");
+  bool matches(item, Map matchState) => item is NullThrownError;
+}
+
+/// A matcher for RangeErrors.
+const Matcher isRangeError = const _RangeError();
+
+class _RangeError extends TypeMatcher {
+  const _RangeError(): super("RangeError");
+  bool matches(item, Map matchState) => item is RangeError;
+}
+
+/// A matcher for StateErrors.
+const Matcher isStateError = const _StateError();
+
+class _StateError extends TypeMatcher {
+  const _StateError(): super("StateError");
+  bool matches(item, Map matchState) => item is StateError;
+}
+
+/// A matcher for UnimplementedErrors.
+const Matcher isUnimplementedError = const _UnimplementedError();
+
+class _UnimplementedError extends TypeMatcher {
+  const _UnimplementedError(): super("UnimplementedError");
+  bool matches(item, Map matchState) => item is UnimplementedError;
+}
+
+/// A matcher for UnsupportedError.
+const Matcher isUnsupportedError = const _UnsupportedError();
+
+class _UnsupportedError extends TypeMatcher {
+  const _UnsupportedError(): super("UnsupportedError");
+  bool matches(item, Map matchState) => item is UnsupportedError;
+}