isInstanceOf<T> Class
Returns a matcher that matches if an object is an instance
of type (or a subtype).
As types are not first class objects in Dart we can only approximate this test by using a generic wrapper class.
For example, to test whether 'bar' is an instance of type 'Foo', we would write:
expect(bar, new isInstanceOf<Foo>());
To get better error message, supply a name when creating the Type wrapper; e.g.:
expect(bar, new isInstanceOf<Foo>('Foo'));
Extends
BaseMatcher > isInstanceOf<T>
Constructors
Code const isInstanceOf([name = 'specified type']) #
const isInstanceOf([name = 'specified type']) : this._name = name;
Methods
Code Description describe(Description description) #
Description describe(Description description) =>
description.add('an instance of ${_name}');
Code bool matches(obj, MatchState matchState) #
bool matches(obj, MatchState matchState) => obj is T;