Add functional test for Page.View() (#5896)

test/Microsoft.AspNetCore.Mvc.FunctionalTests/RazorPagesTest.cs

@@ -113,6 +113,22 @@ namespace Microsoft.AspNetCore.Mvc.FunctionalTests
             Assert.Equal("", content);
         }
 
+        [Fact]
+        public async Task ViewReturnsPage()
+        {
+            // Arrange
+            var request = new HttpRequestMessage(HttpMethod.Get, "http://localhost/OnGetView");
+
+            // Act
+            var response = await Client.SendAsync(request);
+
+            // Assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+
+            var content = await response.Content.ReadAsStringAsync();
+            Assert.Equal("The message: From OnGet", content.Trim());
+        }
+
         [Fact]
         public async Task TempData_SetTempDataInPage_CanReadValue()
         {

test/WebSites/RazorPagesWebSite/OnGetView.cshtml

@@ -0,0 +1,12 @@
+@page
+
+@functions {
+    public IActionResult OnGet()
+    {
+        Message = "From OnGet";
+
+        return View();
+    }
+    public string Message { get; set; } = "Default";
+}
+The message: @Message