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code REORG, pour partage pkg version entre app et tests

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Paul Schneider 2026-08-22 15:17:08 +01:00
commit 634607ba18
Signed by: notazof
GPG key ID: 1DD5D838E5343B06
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src/PostIt.Tests/MainPageSaveTests.cs
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using Avalonia.Controls;
using Avalonia.Headless.XUnit;
using Avalonia.VisualTree;
using Yavsc.Blogspot;
using Yavsc.Api.Client;
using PostIt.ViewModels;
using PostIt.Views;
namespace PostIt.Tests;
/// <summary>
/// Headless UI tests for the "Save" flow in <see cref="MainPage"/>.
/// The pattern is the one <c>SessionStatusBannerTests</c>
/// established: <c>[AvaloniaFact]</c>, a <see cref="Window"/>
/// hosting the page (via a <see cref="Frame"/> because
/// <c>MainPage</c> is a <c>ContentPage</c>), then drive the
/// controls through their public surface and assert on what
/// <see cref="RecordingYavscApiClient"/> saw go on the wire.
///
/// <para>The bug we are pinning: the title <c>TextBox</c> is
/// currently <c>{Binding SelectedPost.Title, Mode=TwoWay}</c>.
/// When <c>SelectedPost is null</c> (i.e. the user has not yet
/// clicked an item in the posts list — which is the only state
/// in which a brand-new post can be created), the binding has
/// no target and the user's keystrokes are silently dropped.
/// Clicking "Save" then routes to the VM branch
/// <c>if (SelectedPost is null) { new BlogPostDto { Title = string.Empty, ... } }</c>
/// which the controller rejects with 400 "The Title field is
/// required." This test fails on that branch today and will
/// pass once the VM owns a dedicated <c>Title</c>/<c>Article</c>
/// buffer that the XAML binds to and the Save command consumes.</para>
/// </summary>
public class MainPageSaveTests
{
[AvaloniaFact]
public async Task Typing_a_title_then_clicking_Save_sends_that_title_in_the_post_body()
{
// Arrange: VM with a recording API client, mounted in a
// headless window via a Frame (MainPage is a ContentPage,
// not a Control, so it needs a navigation host).
var recorder = new CallRecorder();
var api = new RecordingYavscApiClient(recorder);
var blog = new BlogApiClient(api, "http://localhost/");
var viewModel = new MainPageViewModel(blog);
var page = new MainPage { DataContext = viewModel };
// MainPage is a ContentPage (a Page, not a Control), so it
// must be hosted in a navigation surface. The production
// MainWindow.axaml uses NavigationPage, and the API is the
// same one App.axaml.cs drives at boot (PushAsync, fire-
// and-forget in prod because the page is the top of the
// stack immediately).
var nav = new NavigationPage();
_ = nav.PushAsync(page);
var window = new Window { Content = nav };
window.Show();
// Act: type a title into the editor's TextBox without
// first selecting a post in the list — the only state in
// which a new post can be created. Then click Save.
var titleBox = window.GetVisualDescendants()
.OfType<TextBox>()
.First(t => t.PlaceholderText == "Title");
const string typed = "Mon premier billet";
titleBox.Text = typed;
var saveButton = window.GetVisualDescendants()
.OfType<Button>()
.Single(b => b.Content as string == "Save");
saveButton.Command!.Execute(null);
// The Save command is async (RelayCommand over Task) but
// ExecuteAsync would await; the sync Execute enqueues the
// task on the dispatcher. Give the dispatcher a chance to
// run so the awaited CallAsync has actually fired before
// we inspect the recorder.
await Task.Delay(200);
// Assert: the first POST to "blog" carried a BlogPostDto
// whose Title is exactly what the user typed. The bug
// fails this assertion with Title == string.Empty.
Assert.NotEmpty(recorder.Calls);
var (method, path, body) = recorder.FirstCall;
Assert.Equal(HttpMethod.Post, method);
Assert.Equal("blog", path);
var sent = Assert.IsType<BlogPostDto>(body);
Assert.Equal(typed, sent.Title);
}
}