public void TryRemoveOfKeyWithValueRetrievalDoesNotRemoveNonExistingItem()
{
// given
var initialKvPs = new List<KeyValuePair<int, string>>()
{
new KeyValuePair<int, string>(1, "One")
};
using (var observableDictionary = new ObservableDictionary<int, string>(initialKvPs))
{
// when
string value;
var removalResult = observableDictionary.TryRemove(2, out value);
// then check whether all items have been accounted for
removalResult.Should().Be(false);
value.Should().Be(default(string));
observableDictionary.Count.Should().Be(1);
observableDictionary.Should().Contain(1, "One");
}
}
public void TryRemoveOfKeyThrowsOnNullKey()
{
// given
using (var observableDictionary = new ObservableDictionary<string, string>())
{
// when
Action action = () => observableDictionary.TryRemove((string) null);
// then
action
.ShouldThrow<ArgumentNullException>()
.WithMessage("Value cannot be null.\r\nParameter name: key");
observableDictionary.Count.Should().Be(0);
}
}
public void TryRemoveOfKeyValuePairRemovesExistingItem()
{
// given
var initialKvPs = new List<KeyValuePair<int, string>>()
{
new KeyValuePair<int, string>(1, "One")
};
using (var observableDictionary = new ObservableDictionary<int, string>(initialKvPs))
{
// when
var removalResult = observableDictionary.TryRemove(1);
// then check whether all items have been accounted for
removalResult.Should().Be(true);
observableDictionary.Count.Should().Be(0);
observableDictionary.Should().NotContain(1, "One");
}
}
public void TryRemoveOfKeyShouldNotThrowOnNonExistingItem()
{
// given
using (var observableDictionary = new ObservableDictionary<int, string>())
{
// when
Action invalidRemoveRangeForNonExistingKey = () => observableDictionary.TryRemove(10);
// then
invalidRemoveRangeForNonExistingKey
.ShouldNotThrow<ArgumentOutOfRangeException>();
observableDictionary.Count.Should().Be(0);
}
}