feat: add fragment exception test and updated ParamSub test

Refit.Tests/RestService.cs

@@ -311,6 +311,9 @@ public interface IFragmentApi
     [Get("/foo#")]
     Task EmptyFragment();
 
+    [Get("/foo#first#second")]
+    Task ManyFragments();
+
     [Get("/foo#{frag}")]
     Task ParameterFragment(string frag);
 
@@ -2496,6 +2499,23 @@ public async Task ShouldStripEmptyFragment()
         mockHttp.VerifyNoOutstandingExpectation();
     }
 
+    [Fact]
+    public async Task ShouldStripManyFragments()
+    {
+        var mockHttp = new MockHttpMessageHandler();
+        var settings = new RefitSettings { HttpMessageHandlerFactory = () => mockHttp, };
+
+        mockHttp
+            .Expect(HttpMethod.Get, "https://github.com/foo")
+            .Respond(HttpStatusCode.OK);
+
+        var fixture = RestService.For<IFragmentApi>("https://github.com", settings);
+
+        await fixture.ManyFragments();
+
+        mockHttp.VerifyNoOutstandingExpectation();
+    }
+
     [Fact]
     public async Task ShouldStripParameterFragment()
     {

Refit.Tests/RestServiceExceptions.cs

@@ -57,6 +57,12 @@ public interface IInvalidParamSubstitution
     Task<string> GetValue(string path);
 }
 
+public interface IInvalidFragmentParamSubstitution
+{
+    [Get("/{#path}")]
+    Task<string> GetValue(string path);
+}
+
 public interface IUrlNoMatchingParameters
 {
     [Get("/{value}")]
@@ -158,10 +164,19 @@ public void RoundTripWithTrailingWhitespaceShouldThrow()
     }
 
     [Fact]
-    public void InvalidParamSubstitutionShouldNotThrow()
+    public async Task InvalidParamSubstitutionShouldThrow()
     {
         var service = RestService.For<IInvalidParamSubstitution>("https://api.github.com");
         Assert.NotNull(service);
+
+        await Assert.ThrowsAsync<ApiException>(() => service.GetValue("throws"));
+    }
+
+    [Fact]
+    public void InvalidFragmentParamSubstitutionShouldThrow()
+    {
+        var exception = Assert.Throws<ArgumentException>(() => RestService.For<IInvalidFragmentParamSubstitution>("https://api.github.com"));
+        AssertExceptionContains("but no method parameter matches", exception);
     }
 
     [Fact]