public void ConsumerChangeToken_IsNotRefreshed_AfterDisposal()
{
var endpoint1 = CreateEndpoint("/a");
var dataSource1 = new DynamicEndpointDataSource(endpoint1);
var observableCollection = new ObservableCollection <EndpointDataSource> {
dataSource1
};
var compositeDataSource = new CompositeEndpointDataSource(observableCollection);
var changeToken1 = compositeDataSource.GetChangeToken();
var token = Assert.IsType <CancellationChangeToken>(changeToken1);
Assert.False(token.HasChanged);
var endpoint2 = CreateEndpoint("/b");
// Update DynamicEndpointDatasource
dataSource1.AddEndpoint(endpoint2);
Assert.True(changeToken1.HasChanged);
var changeToken2 = compositeDataSource.GetChangeToken();
Assert.NotSame(changeToken2, changeToken1);
token = Assert.IsType <CancellationChangeToken>(changeToken2);
Assert.False(token.HasChanged);
// Update ObservableCollection
var endpoint3 = CreateEndpoint("/c");
var datasource2 = new DynamicEndpointDataSource(endpoint3);
observableCollection.Add(datasource2);
Assert.True(changeToken2.HasChanged);
var changeToken3 = compositeDataSource.GetChangeToken();
Assert.NotSame(changeToken3, changeToken2);
Assert.NotSame(changeToken3, changeToken1);
token = Assert.IsType <CancellationChangeToken>(changeToken3);
Assert.False(token.HasChanged);
compositeDataSource.Dispose();
// Update DynamicEndpointDatasource and ObservableCollection after disposing CompositeEndpointDataSource.
var endpoint4 = CreateEndpoint("/d");
dataSource1.AddEndpoint(endpoint4);
var endpoint5 = CreateEndpoint("/d");
var datasource3 = new DynamicEndpointDataSource(endpoint5);
observableCollection.Add(datasource3);
// Token is not changed since the CompositeEndpointDataSource was disposed prior to the last endpoint being added.
Assert.False(changeToken3.HasChanged);
}
public void ConsumerChangeToken_IsRefreshed_WhenDataSourceCallbackFires()
{
// Arrange1
var endpoint1 = CreateEndpoint("/a");
var dataSource1 = new DynamicEndpointDataSource(endpoint1);
var compositeDataSource = new CompositeEndpointDataSource(new[] { dataSource1 });
// Act1
var endpoints = compositeDataSource.Endpoints;
// Assert1
var changeToken1 = compositeDataSource.GetChangeToken();
var token = Assert.IsType <CancellationChangeToken>(changeToken1);
Assert.False(token.HasChanged); // initial state
// Arrange2
var endpoint2 = CreateEndpoint("/b");
// Act2
dataSource1.AddEndpoint(endpoint2);
// Assert2
Assert.True(changeToken1.HasChanged); // old token is expected to be changed
var changeToken2 = compositeDataSource.GetChangeToken(); // new token is in a unchanged state
Assert.NotSame(changeToken2, changeToken1);
token = Assert.IsType <CancellationChangeToken>(changeToken2);
Assert.False(token.HasChanged);
// Arrange3
var endpoint3 = CreateEndpoint("/c");
// Act2
dataSource1.AddEndpoint(endpoint3);
// Assert2
Assert.True(changeToken2.HasChanged); // old token is expected to be changed
var changeToken3 = compositeDataSource.GetChangeToken(); // new token is in a unchanged state
Assert.NotSame(changeToken3, changeToken2);
Assert.NotSame(changeToken3, changeToken1);
token = Assert.IsType <CancellationChangeToken>(changeToken3);
Assert.False(token.HasChanged);
}
public void ConsumerChangeToken_IsRefreshed_WhenNewDataSourceCallbackFires()
{
var endpoint1 = CreateEndpoint("/a");
var dataSource1 = new DynamicEndpointDataSource(endpoint1);
var observableCollection = new ObservableCollection <EndpointDataSource> {
dataSource1
};
var compositeDataSource = new CompositeEndpointDataSource(observableCollection);
var changeToken1 = compositeDataSource.GetChangeToken();
var token = Assert.IsType <CancellationChangeToken>(changeToken1);
Assert.False(token.HasChanged);
var endpoint2 = CreateEndpoint("/b");
// Update ObservableCollection with a new DynamicEndpointDataSource
var dataSource2 = new DynamicEndpointDataSource(endpoint2);
observableCollection.Add(dataSource2);
Assert.True(changeToken1.HasChanged);
var changeToken2 = compositeDataSource.GetChangeToken();
Assert.NotSame(changeToken2, changeToken1);
token = Assert.IsType <CancellationChangeToken>(changeToken2);
Assert.False(token.HasChanged);
// Update the newly added DynamicEndpointDataSource
var endpoint3 = CreateEndpoint("/c");
dataSource2.AddEndpoint(endpoint3);
Assert.True(changeToken2.HasChanged);
var changeToken3 = compositeDataSource.GetChangeToken();
Assert.NotSame(changeToken3, changeToken2);
Assert.NotSame(changeToken3, changeToken1);
token = Assert.IsType <CancellationChangeToken>(changeToken3);
Assert.False(token.HasChanged);
}