public async Task ExecuteResultAsync_WithFragment_PassesCorrectValuesToRedirect_WithPreserveMethod()
    {
        // Arrange
        var expectedUrl        = "/SampleAction#test";
        var expectedStatusCode = StatusCodes.Status308PermanentRedirect;

        var httpContext = GetHttpContext(expectedUrl);
        var result      = new RedirectToRouteResult("Sample", null, true, true, "test");

        // Act
        await result.ExecuteAsync(httpContext);

        // Assert
        Assert.Equal(expectedStatusCode, httpContext.Response.StatusCode);
        Assert.Equal(expectedUrl, httpContext.Response.Headers["Location"]);
    }
    public async Task ExecuteResultAsync_UsesRouteName_ToGenerateLocationHeader()
    {
        // Arrange
        var routeName   = "orders_api";
        var locationUrl = "/api/orders/10";

        var httpContext = GetHttpContext(locationUrl);

        var result = new RedirectToRouteResult(routeName, new { id = 10 });

        // Act
        await result.ExecuteAsync(httpContext);

        // Assert
        Assert.True(httpContext.Response.Headers.ContainsKey("Location"), "Location header not found");
        Assert.Equal(locationUrl, httpContext.Response.Headers["Location"]);
    }
    public async Task RedirectToRoute_Execute_ThrowsOnNullUrl()
    {
        // Arrange
        var httpContext = new DefaultHttpContext();

        httpContext.RequestServices = CreateServices(null).BuildServiceProvider();

        var result = new RedirectToRouteResult(null, new Dictionary <string, object>());

        // Act & Assert
        await ExceptionAssert.ThrowsAsync <InvalidOperationException>(
            async() =>
        {
            await result.ExecuteAsync(httpContext);
        },
            "No route matches the supplied values.");
    }