public void RequiresTypeParameter()
{
var instance = new DynamicComponent();
var renderer = new TestRenderer();
var componentId = renderer.AssignRootComponentId(instance);
var ex = Assert.Throws <InvalidOperationException>(
() => renderer.RenderRootComponent(componentId, ParameterView.Empty));
Assert.StartsWith(
$"{ nameof(DynamicComponent)} requires a non-null value for the parameter {nameof(DynamicComponent.Type)}.",
ex.Message);
}
public void RejectsUnknownParameters()
{
var ex = Assert.Throws <InvalidOperationException>(() =>
{
var parameters = new Dictionary <string, object>
{
{ "unknownparameter", 123 }
};
_ = new DynamicComponent().SetParametersAsync(ParameterView.FromDictionary(parameters));
});
Assert.StartsWith(
$"{ nameof(DynamicComponent)} does not accept a parameter with the name 'unknownparameter'.",
ex.Message);
}
public void CanRenderComponentByType()
{
// Arrange
var instance = new DynamicComponent();
var renderer = new TestRenderer();
var componentId = renderer.AssignRootComponentId(instance);
var parameters = ParameterView.FromDictionary(new Dictionary <string, object>
{
{ nameof(DynamicComponent.Type), typeof(TestComponent) },
});
// Act
renderer.RenderRootComponent(componentId, parameters);
// Assert
var batch = renderer.Batches.Single();
AssertFrame.Component <TestComponent>(batch.ReferenceFrames[0], 2, 0);
AssertFrame.Text(batch.ReferenceFrames[2], "Hello from TestComponent with IntProp=0", 0);
}
public void CanRenderComponentByTypeWithParameters()
{
// Arrange
var instance = new DynamicComponent();
var renderer = new TestRenderer();
var childParameters = new Dictionary <string, object>
{
{ nameof(TestComponent.IntProp), 123 },
{ nameof(TestComponent.ChildContent), (RenderFragment)(builder =>
{
builder.AddContent(0, "This is some child content");
}) },
};
var parameters = ParameterView.FromDictionary(new Dictionary <string, object>
{
{ nameof(DynamicComponent.Type), typeof(TestComponent) },
{ nameof(DynamicComponent.Parameters), childParameters },
});
// Act
renderer.RenderRootComponent(
renderer.AssignRootComponentId(instance),
parameters);
// Assert
var batch = renderer.Batches.Single();
// It renders a reference to the child component with its parameters
AssertFrame.Component <TestComponent>(batch.ReferenceFrames[0], 4, 0);
AssertFrame.Attribute(batch.ReferenceFrames[1], nameof(TestComponent.IntProp), 123, 1);
AssertFrame.Attribute(batch.ReferenceFrames[2], nameof(TestComponent.ChildContent), 1);
// The child component itself is rendered
AssertFrame.Text(batch.ReferenceFrames[4], "Hello from TestComponent with IntProp=123", 0);
AssertFrame.Text(batch.ReferenceFrames[5], "This is some child content", 0);
}
public void CanAccessToChildComponentInstance()
{
// Arrange
var instance = new DynamicComponent();
var renderer = new TestRenderer();
var childParameters = new Dictionary <string, object>
{
{ nameof(TestComponent.IntProp), 123 },
};
var parameters = ParameterView.FromDictionary(new Dictionary <string, object>
{
{ nameof(DynamicComponent.Type), typeof(TestComponent) },
{ nameof(DynamicComponent.Parameters), childParameters },
});
// Act
renderer.RenderRootComponent(
renderer.AssignRootComponentId(instance),
parameters);
// Assert
Assert.IsType <TestComponent>(instance.Instance);
Assert.Equal(123, ((TestComponent)instance.Instance).IntProp);
}
