Add C# documentation comments (#15)

* Add C# documentation comments

* Add tests for error message

src/Standards.AspNetCore/Dates/IsoDateModelBinder.cs

@@ -6,6 +6,17 @@
 
 namespace Standards.AspNetCore
 {
+    /// <summary>
+    /// An ASP.NET Core model binder to enforce ISO-8601 (YYYY-MM-DD) format for <see cref="System.DateTime"/> objects.
+    /// <example>For example, apply to a Controller action:
+    /// <code>
+    /// [HttpGet]
+    /// public IActionResult Get([ModelBinder(typeof(IsoDateModelBinder))] DateTime date) {
+    ///     return Ok("Date is in ISO format!");
+    /// }
+    /// </code>
+    /// </example>
+    /// </summary>
     public class IsoDateModelBinder : IModelBinder
     {
         public Task BindModelAsync(ModelBindingContext bindingContext)
@@ -32,6 +43,18 @@ public Task BindModelAsync(ModelBindingContext bindingContext)
         }      
     }
 
+    /// <summary>
+    /// An ASP.NET Core model binder provider to enforce ISO-8601 (YYYY-MM-DD) format for <see cref="System.DateTime"/> objects.
+    /// <example>For example, apply globally in ASP.NET Core Startup.cs:
+    /// <code>
+    /// public override void ConfigureServices(IServiceCollection services) {
+    ///     services.AddControllers(options => {
+    ///         options.ModelBinderProviders.Insert(0, new IsoDateModelBinderProvider());
+    ///     })
+    /// }
+    /// </code>
+    /// </example>
+    /// </summary>
     public class IsoDateModelBinderProvider : IModelBinderProvider
     {
         public IModelBinder GetBinder(ModelBinderProviderContext context)

tests/Standards.AspNetCore.Tests/IsoDateModelBinderTests.cs

@@ -1,15 +1,11 @@
 using Xunit;
 using Microsoft.AspNetCore.Mvc.Testing;
 using System.Net;
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Threading.Tasks;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
 using Standards.AspNetCore.Tests.TestServer;
+using System.Text.Json;
+using Microsoft.AspNetCore.Mvc;
+using System.Text.Json.Serialization;
 
 namespace Standards.AspNetCore.Tests
 {
@@ -49,17 +45,29 @@ public IsoDateModelBinderTests(WebApplicationFactory<Startup> factory)
         [InlineData("21.08.2021", "provider", HttpStatusCode.BadRequest)]
         [InlineData("2021.08.21", "provider", HttpStatusCode.BadRequest)]
         [InlineData("2021.21.08", "provider", HttpStatusCode.BadRequest)]
-
         public async Task AttributeTests(string date, string route, HttpStatusCode expectedStatusCode)
         {
             // Arrange
             using var client = _factory.CreateClient();
 
             // Act
-            var response = await client.GetAsync($"/IsoDateModelBinder/{route}?date={date}");
+            using var response = await client.GetAsync($"/IsoDateModelBinder/{route}?date={date}");
 
             // Assert
+            if (expectedStatusCode != HttpStatusCode.OK)
+            {
+                using var responseStream = await response.Content.ReadAsStreamAsync();
+                var problem = await JsonSerializer.DeserializeAsync<ProblemDetails>(responseStream);
+                var error = JsonSerializer.Deserialize<Error>(problem.Extensions["errors"].ToString());
+                Assert.Equal("Invalid date; must be in ISO-8601 format i.e. YYYY-MM-DD.", error.Date[0]);
+            }
             Assert.Equal(expectedStatusCode, response.StatusCode);
         }        
     }
+
+    public class Error
+    {
+        [JsonPropertyName("date")]
+        public string[] Date { get; set; }
+    }
 }

version.json

@@ -1,6 +1,6 @@
 {
     "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-    "version": "1.0.0-alpha.5",
+    "version": "1.0.0-beta.1",
     "gitCommitIdShortAutoMinimum": 7,
     "nugetPackageVersion": {
         "semVer": 2