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Merge pull request #9 from linkdotnet/feature/give-kudos
Feature/give kudos
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‎LinkDotNet.Blog.IntegrationTests/Web/Pages/BlogPostPageTests.cs‎

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@@ -0,0 +1,67 @@
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using System.Threading.Tasks;
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using Blazored.LocalStorage;
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using Blazored.Toast.Services;
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using Bunit;
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using Bunit.TestDoubles;
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using FluentAssertions;
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using LinkDotNet.Blog.TestUtilities;
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using LinkDotNet.Blog.Web.Pages;
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using LinkDotNet.Blog.Web.Shared;
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using LinkDotNet.Infrastructure.Persistence;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.DependencyInjection;
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using Moq;
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using Xunit;
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namespace LinkDotNet.Blog.IntegrationTests.Web.Pages
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{
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public class BlogPostPageTests : SqlDatabaseTestBase
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{
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[Fact]
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public async Task ShouldAddLikeOnEvent()
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{
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var publishedPost = new BlogPostBuilder().WithLikes(2).IsPublished().Build();
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await BlogPostRepository.StoreAsync(publishedPost);
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using var ctx = new TestContext();
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ctx.JSInterop.Mode = JSRuntimeMode.Loose;
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ctx.Services.AddScoped<IRepository>(_ => BlogPostRepository);
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ctx.Services.AddScoped(_ => new Mock<ILocalStorageService>().Object);
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ctx.Services.AddScoped(_ => new Mock<IToastService>().Object);
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ctx.AddTestAuthorization().SetAuthorized("s");
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var cut = ctx.RenderComponent<BlogPostPage>(
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p => p.Add(b => b.BlogPostId, publishedPost.Id));
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var likeComponent = cut.FindComponent<Like>();
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likeComponent.SetParametersAndRender(c => c.Add(p => p.BlogPost, publishedPost));
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likeComponent.Find("button").Click();
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var fromDb = await DbContext.BlogPosts.AsNoTracking().SingleAsync(d => d.Id == publishedPost.Id);
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fromDb.Likes.Should().Be(3);
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}
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[Fact]
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public async Task ShouldSubtractLikeOnEvent()
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{
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var publishedPost = new BlogPostBuilder().WithLikes(2).IsPublished().Build();
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await BlogPostRepository.StoreAsync(publishedPost);
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using var ctx = new TestContext();
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var localStorage = new Mock<ILocalStorageService>();
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localStorage.Setup(l => l.ContainKeyAsync("hasLiked", default)).ReturnsAsync(true);
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localStorage.Setup(l => l.GetItemAsync<bool>("hasLiked", default)).ReturnsAsync(true);
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ctx.JSInterop.Mode = JSRuntimeMode.Loose;
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ctx.Services.AddScoped<IRepository>(_ => BlogPostRepository);
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ctx.Services.AddScoped(_ => localStorage.Object);
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ctx.Services.AddScoped(_ => new Mock<IToastService>().Object);
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ctx.AddTestAuthorization().SetAuthorized("s");
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var cut = ctx.RenderComponent<BlogPostPage>(
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p => p.Add(b => b.BlogPostId, publishedPost.Id));
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var likeComponent = cut.FindComponent<Like>();
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likeComponent.SetParametersAndRender(c => c.Add(p => p.BlogPost, publishedPost));
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likeComponent.Find("button").Click();
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var fromDb = await DbContext.BlogPosts.AsNoTracking().SingleAsync(d => d.Id == publishedPost.Id);
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fromDb.Likes.Should().Be(1);
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}
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}
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}

‎LinkDotNet.Blog.TestUtilities/BlogPostBuilder.cs‎

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@@ -10,6 +10,7 @@ public class BlogPostBuilder
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private string url = "localhost";
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private bool isPublished = true;
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private string[] tags;
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private int likes;
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public BlogPostBuilder WithTitle(string title)
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{
@@ -47,9 +48,17 @@ public BlogPostBuilder IsPublished(bool isPublished = true)
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return this;
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}
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public BlogPostBuilder WithLikes(int likes)
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{
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this.likes = likes;
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return this;
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}
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public BlogPost Build()
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{
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return BlogPost.Create(title, shortDescription, content, url, isPublished, tags);
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var blogPost = BlogPost.Create(title, shortDescription, content, url, isPublished, tags);
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blogPost.Likes = likes;
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return blogPost;
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}
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}
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}

‎LinkDotNet.Blog.UnitTests/Web/Shared/LikeTests.cs‎

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using Blazored.LocalStorage;
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using Bunit;
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using FluentAssertions;
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using LinkDotNet.Blog.TestUtilities;
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using LinkDotNet.Blog.Web.Shared;
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using Microsoft.Extensions.DependencyInjection;
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using Moq;
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using Xunit;
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namespace LinkDotNet.Blog.UnitTests.Web.Shared
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{
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public class LikeTests : TestContext
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{
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[Theory]
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[InlineData(0, "0 Likes")]
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[InlineData(1, "1 Like")]
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[InlineData(2, "2 Likes")]
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public void ShouldDisplayLikes(int likes, string expectedText)
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{
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Services.AddScoped(_ => new Mock<ILocalStorageService>().Object);
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var blogPost = new BlogPostBuilder().WithLikes(likes).Build();
22+
var cut = RenderComponent<Like>(
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p => p.Add(l => l.BlogPost, blogPost));
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var label = cut.Find("small").TextContent;
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label.Should().Be(expectedText);
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}
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[Fact]
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public void ShouldInvokeEventWhenButtonClicked()
32+
{
33+
Services.AddScoped(_ => new Mock<ILocalStorageService>().Object);
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var blogPost = new BlogPostBuilder().Build();
35+
var wasClicked = false;
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var wasLike = false;
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var cut = RenderComponent<Like>(
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p => p.Add(l => l.BlogPost, blogPost)
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.Add(l => l.OnBlogPostLiked, b =>
40+
{
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wasClicked = true;
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wasLike = b;
43+
}));
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cut.Find("button").Click();
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wasClicked.Should().BeTrue();
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wasLike.Should().BeTrue();
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}
50+
51+
[Fact]
52+
public void ShouldSetLocalStorageVariableOnClick()
53+
{
54+
var localStorage = new Mock<ILocalStorageService>();
55+
Services.AddScoped(_ => localStorage.Object);
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var blogPost = new BlogPostBuilder().Build();
57+
var cut = RenderComponent<Like>(
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p => p.Add(l => l.BlogPost, blogPost));
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cut.Find("button").Click();
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localStorage.Verify(l => l.SetItemAsync("hasLiked", true, default), Times.Once);
63+
}
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65+
[Fact]
66+
public void ShouldCheckLocalStorageOnInit()
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{
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var localStorage = new Mock<ILocalStorageService>();
69+
localStorage.Setup(l => l.ContainKeyAsync("hasLiked", default)).ReturnsAsync(true);
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localStorage.Setup(l => l.GetItemAsync<bool>("hasLiked", default)).ReturnsAsync(true);
71+
Services.AddScoped(_ => localStorage.Object);
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var blogPost = new BlogPostBuilder().Build();
73+
var wasLike = true;
74+
var cut = RenderComponent<Like>(
75+
p => p.Add(l => l.BlogPost, blogPost)
76+
.Add(l => l.OnBlogPostLiked, b => wasLike = b));
77+
78+
cut.Find("button").Click();
79+
80+
wasLike.Should().BeFalse();
81+
}
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[Fact]
84+
public void ShouldCheckStorageOnClickAgainAndDoNothingOnMismatch()
85+
{
86+
var localStorage = new Mock<ILocalStorageService>();
87+
Services.AddScoped(_ => localStorage.Object);
88+
var blogPost = new BlogPostBuilder().Build();
89+
var wasClicked = false;
90+
var cut = RenderComponent<Like>(
91+
p => p.Add(l => l.BlogPost, blogPost)
92+
.Add(l => l.OnBlogPostLiked, _ => wasClicked = true));
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localStorage.Setup(l => l.ContainKeyAsync("hasLiked", default)).ReturnsAsync(true);
94+
localStorage.Setup(l => l.GetItemAsync<bool>("hasLiked", default)).ReturnsAsync(true);
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cut.Find("button").Click();
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wasClicked.Should().BeFalse();
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}
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}
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}

‎LinkDotNet.Blog.Web/LinkDotNet.Blog.Web.csproj‎

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@@ -6,6 +6,7 @@
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</PropertyGroup>
77

88
<ItemGroup>
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<PackageReference Include="Blazored.LocalStorage" Version="4.1.2" />
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<PackageReference Include="Blazored.Toast" Version="3.1.2" />
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<PackageReference Include="Markdig" Version="0.25.0" />
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<PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="5.0.7" />

‎LinkDotNet.Blog.Web/Pages/BlogPostPage.razor‎

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@(RenderMarkupString(BlogPost.Content))
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</div>
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</div>
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<Like BlogPost="@BlogPost" OnBlogPostLiked="@UpdateLikes"></Like>
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</div>
3637
</div>
3738
}
@@ -55,4 +56,11 @@ else
5556
StateHasChanged();
5657
}
5758
}
59+
60+
private async Task UpdateLikes(bool hasLiked)
61+
{
62+
BlogPost = await _repository.GetByIdAsync(BlogPostId);
63+
BlogPost.Likes = hasLiked ? BlogPost.Likes + 1 : BlogPost.Likes - 1;
64+
await _repository.StoreAsync(BlogPost);
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}
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}

‎LinkDotNet.Blog.Web/Shared/Like.razor‎

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@using LinkDotNet.Domain
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@using Blazored.LocalStorage
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@using LinkDotNet.Infrastructure.Persistence
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@inject ILocalStorageService _localStorage
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<div class="like-container">
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<small>@BlogPost.Likes @LikeText</small>
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<button class="btn @BtnClass" @onclick="LikeBlogPost"><i class="far fa-thumbs-up"></i> @LikeTextButton</button>
8+
</div>
9+
10+
@code {
11+
[Parameter]
12+
public BlogPost BlogPost { get; set; }
13+
14+
[Parameter]
15+
public EventCallback<bool> OnBlogPostLiked { get; set; }
16+
17+
private bool HasLiked { get; set; }
18+
19+
private string BtnClass => HasLiked ? "btn-secondary" : "btn-primary";
20+
21+
private string LikeTextButton => HasLiked ? "Unlike" : "Like";
22+
23+
private string LikeText => BlogPost.Likes == 1 ? "Like" : "Likes";
24+
25+
protected override async Task OnAfterRenderAsync(bool firstRender)
26+
{
27+
if (firstRender)
28+
{
29+
HasLiked = await GetHasLiked();
30+
StateHasChanged();
31+
}
32+
}
33+
34+
private async Task LikeBlogPost()
35+
{
36+
// Prevent multiple open sites to like / unlike multiple times
37+
var hasLikedFromLocalStorage = await GetHasLiked();
38+
if (HasLiked != hasLikedFromLocalStorage)
39+
{
40+
return;
41+
}
42+
43+
HasLiked = !HasLiked;
44+
await OnBlogPostLiked.InvokeAsync(HasLiked);
45+
await _localStorage.SetItemAsync("hasLiked", HasLiked);
46+
}
47+
48+
private async Task<bool> GetHasLiked()
49+
{
50+
if (await _localStorage.ContainKeyAsync("hasLiked"))
51+
{
52+
return await _localStorage.GetItemAsync<bool>("hasLiked");
53+
}
54+
55+
return false;
56+
}
57+
}

‎LinkDotNet.Blog.Web/Shared/Like.razor.css‎

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.like-container {
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float: right;
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margin-top: 20px;
4+
}
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.like-container button {
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margin-left: 10px;
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}

‎LinkDotNet.Blog.Web/Startup.cs‎

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using Blazored.LocalStorage;
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using Blazored.Toast;
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using LinkDotNet.Blog.Web.Authentication.Auth0;
34
using LinkDotNet.Blog.Web.RegistrationExtensions;
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3940
services.UseAuth0Authentication(Configuration);
4041

4142
services.AddBlazoredToast();
43+
services.AddBlazoredLocalStorage();
4244
}
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4446
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

‎LinkDotNet.Domain/BlogPost.cs‎

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2727
public bool IsPublished { get; set; }
2828

29+
public int Likes { get; set; }
30+
2931
public static BlogPost Create(
3032
string title,
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string shortDescription,

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