public void InstantiatesChildComponentsForInsertedFrames()
{
// Arrange
oldTree.AddText(10, "text1"); // 0: text1
oldTree.OpenElement(11, "container"); // 1: <container>
oldTree.CloseElement(); // </container>
newTree.AddText(10, "text1"); // 0: text1
newTree.OpenElement(11, "container"); // 1: <container>
newTree.OpenComponent <FakeComponent>(12); // 2: <FakeComponent>
newTree.CloseComponent(); // </FakeComponent>
newTree.OpenComponent <FakeComponent2>(13); // 3: <FakeComponent2>
newTree.CloseComponent(); // </FakeComponent2>
newTree.CloseElement(); // </container>
// Act
var renderBatch = GetRenderedBatch();
// Assert
Assert.Equal(3, renderBatch.UpdatedComponents.Count);
// First component is the root one
var firstComponentDiff = renderBatch.UpdatedComponents.Array[0];
Assert.Collection(firstComponentDiff.Edits,
entry => AssertEdit(entry, RenderTreeEditType.StepIn, 1),
entry =>
{
AssertEdit(entry, RenderTreeEditType.PrependFrame, 0);
Assert.Equal(0, entry.ReferenceFrameIndex);
},
entry =>
{
AssertEdit(entry, RenderTreeEditType.PrependFrame, 1);
Assert.Equal(1, entry.ReferenceFrameIndex);
},
entry => AssertEdit(entry, RenderTreeEditType.StepOut, 0));
Assert.Collection(firstComponentDiff.ReferenceFrames,
frame => AssertFrame.ComponentWithInstance <FakeComponent>(frame, 0, 12),
frame => AssertFrame.ComponentWithInstance <FakeComponent2>(frame, 1, 13));
// Second in batch is the first child component
var secondComponentDiff = renderBatch.UpdatedComponents.Array[1];
Assert.Equal(0, secondComponentDiff.ComponentId);
Assert.Empty(secondComponentDiff.Edits); // Because FakeComponent produces no frames
Assert.Empty(secondComponentDiff.ReferenceFrames); // Because FakeComponent produces no frames
// Third in batch is the second child component
var thirdComponentDiff = renderBatch.UpdatedComponents.Array[2];
Assert.Equal(1, thirdComponentDiff.ComponentId);
Assert.Collection(thirdComponentDiff.Edits,
entry => AssertEdit(entry, RenderTreeEditType.PrependFrame, 0));
Assert.Collection(thirdComponentDiff.ReferenceFrames,
frame => AssertFrame.Text(frame, $"Hello from {nameof(FakeComponent2)}"));
}
public void InstantiatesChildComponentsForInsertedFrames()
{
// Arrange
oldTree.AddContent(10, "text1"); // 0: text1
oldTree.OpenElement(11, "container"); // 1: <container>
oldTree.CloseElement(); // </container>
newTree.AddContent(10, "text1"); // 0: text1
newTree.OpenElement(11, "container"); // 1: <container>
newTree.OpenComponent <FakeComponent>(12); // 2: <FakeComponent>
newTree.CloseComponent(); // </FakeComponent>
newTree.OpenComponent <FakeComponent2>(13); // 3: <FakeComponent2>
newTree.CloseComponent(); // </FakeComponent2>
newTree.CloseElement(); // </container>
// Act
var renderBatch = GetRenderedBatch();
// Assert
var diff = renderBatch.UpdatedComponents.Single();
Assert.Collection(diff.Edits,
entry => AssertEdit(entry, RenderTreeEditType.StepIn, 1),
entry =>
{
AssertEdit(entry, RenderTreeEditType.PrependFrame, 0);
Assert.Equal(0, entry.ReferenceFrameIndex);
},
entry =>
{
AssertEdit(entry, RenderTreeEditType.PrependFrame, 1);
Assert.Equal(1, entry.ReferenceFrameIndex);
},
entry => AssertEdit(entry, RenderTreeEditType.StepOut, 0));
AssertFrame.ComponentWithInstance <FakeComponent>(renderBatch.ReferenceFrames.Array[0], 0, null, 12);
AssertFrame.ComponentWithInstance <FakeComponent2>(renderBatch.ReferenceFrames.Array[1], 1, null, 13);
}