public async Task Virtualize_DispatchesExceptionsFromItemsProviderThroughRenderer()
{
Virtualize <int> renderedVirtualize = null;
var rootComponent = new VirtualizeTestHostcomponent
{
InnerContent = BuildVirtualize(10f, AlwaysThrowsItemsProvider <int>, null, virtualize => renderedVirtualize = virtualize)
};
var serviceProvider = new ServiceCollection()
.AddTransient((sp) => Mock.Of <IJSRuntime>())
.BuildServiceProvider();
var testRenderer = new TestRenderer(serviceProvider);
var componentId = testRenderer.AssignRootComponentId(rootComponent);
// Render to populate the component reference.
await testRenderer.RenderRootComponentAsync(componentId);
Assert.NotNull(renderedVirtualize);
// Simulate a JS spacer callback.
((IVirtualizeJsCallbacks)renderedVirtualize).OnAfterSpacerVisible(10f, 50f, 100f);
// Validate that the exception is dispatched through the renderer.
var ex = await Assert.ThrowsAsync <InvalidOperationException>(async() => await testRenderer.RenderRootComponentAsync(componentId));
Assert.Equal("Thrown from items provider.", ex.Message);
}
public async Task Virtualize_ThrowsWhenGivenMultipleItemSources()
{
var rootComponent = new VirtualizeTestHostcomponent
{
InnerContent = BuildVirtualize(10f, EmptyItemsProvider <int>, new List <int>())
};
var serviceProvider = new ServiceCollection()
.AddTransient((sp) => Mock.Of <IJSRuntime>())
.BuildServiceProvider();
var testRenderer = new TestRenderer(serviceProvider);
var componentId = testRenderer.AssignRootComponentId(rootComponent);
var ex = await Assert.ThrowsAsync <InvalidOperationException>(async() => await testRenderer.RenderRootComponentAsync(componentId));
Assert.Contains("can only accept one item source from its parameters", ex.Message);
}
public async Task Virtualize_ThrowsWhenGivenNoItemSources()
{
var rootComponent = new VirtualizeTestHostcomponent
{
InnerContent = BuildVirtualize <int>(10f, null, null)
};
var serviceProvider = new ServiceCollection()
.AddTransient((sp) => Mock.Of <IJSRuntime>())
.BuildServiceProvider();
var testRenderer = new TestRenderer(serviceProvider);
var componentId = testRenderer.AssignRootComponentId(rootComponent);
var ex = await Assert.ThrowsAsync <InvalidOperationException>(async() => await testRenderer.RenderRootComponentAsync(componentId));
Assert.Contains("parameters to be specified and non-null", ex.Message);
}
public async Task Virtualize_ThrowsWhenGivenNonPositiveItemSize()
{
var rootComponent = new VirtualizeTestHostcomponent
{
InnerContent = BuildVirtualize(0f, EmptyItemsProvider <int>, null)
};
var serviceProvider = new ServiceCollection()
.AddTransient((sp) => Mock.Of <IJSRuntime>())
.BuildServiceProvider();
var testRenderer = new TestRenderer(serviceProvider);
var componentId = testRenderer.AssignRootComponentId(rootComponent);
var ex = await Assert.ThrowsAsync <InvalidOperationException>(async() => await testRenderer.RenderRootComponentAsync(componentId));
Assert.Contains("requires a positive value for parameter", ex.Message);
}