public async Task RenderSectionAsync_ThrowsIfNotInvokedFromLayoutPage()
{
// Arrange
var expected = new HelperResult(NullAsyncWrite);
var page = CreatePage(async v =>
{
v.Path = "/Views/TestPath/Test.cshtml";
await v.RenderSectionAsync("header");
});
// Act & Assert
var ex = await Assert.ThrowsAsync<InvalidOperationException>(page.ExecuteAsync);
Assert.Equal(
"RenderSectionAsync invocation in '/Views/TestPath/Test.cshtml' is invalid. " +
"RenderSectionAsync can only be called from a layout page.",
ex.Message);
}
public async Task RenderSectionAsync_ThrowsIfSectionIsRenderedMoreThanOnce_WithSyncMethod()
{
// Arrange
var expected = new HelperResult(NullAsyncWrite);
var page = CreatePage(async v =>
{
v.Path = "/Views/TestPath/Test.cshtml";
v.RenderSection("header");
await v.RenderSectionAsync("header");
});
page.PreviousSectionWriters = new Dictionary<string, RenderAsyncDelegate>
{
{ "header", _nullRenderAsyncDelegate }
};
// Act & Assert
var ex = await Assert.ThrowsAsync<InvalidOperationException>(page.ExecuteAsync);
Assert.Equal(
"RenderSectionAsync invocation in '/Views/TestPath/Test.cshtml' is invalid." +
" The section 'header' has already been rendered.",
ex.Message);
}