Adding tests for the CallbackScriptTagHelperComponent.

Author: jooni91

tests/ReCaptcha.Tests/TagHelpers/CallbackScriptTagHelperComponentTests.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Griesoft.AspNetCore.ReCaptcha.TagHelpers;
+using Microsoft.AspNetCore.Razor.TagHelpers;
+using NUnit.Framework;
+
+namespace ReCaptcha.Tests.TagHelpers
+{
+    [TestFixture]
+    public class CallbackScriptTagHelperComponentTests
+    {
+        private TagHelperOutput _tagHelperOutput;
+
+        [SetUp]
+        public void Initialize()
+        {
+            _tagHelperOutput = new TagHelperOutput("body",
+                new TagHelperAttributeList(), (useCachedResult, htmlEncoder) =>
+                {
+                    var tagHelperContent = new DefaultTagHelperContent();
+                    tagHelperContent.SetContent(string.Empty);
+                    return Task.FromResult<TagHelperContent>(tagHelperContent);
+                });
+        }
+
+        [Test]
+        public void Construction_IsSuccessful()
+        {
+            // Arrange
+            var formId = "formId";
+
+            // Act
+            var instance = new CallbackScriptTagHelperComponent(formId);
+
+            // Assert
+            Assert.NotNull(instance);
+        }
+
+        [Test]
+        public void Constructor_ShouldThrow_WhenFormIdNull()
+        {
+            // Arrange
+
+
+            // Act
+
+
+            // Assert
+            Assert.Throws<ArgumentNullException>(() => new CallbackScriptTagHelperComponent(null));
+        }
+
+        [Test]
+        public void CallbackScript_ShouldReturn_ExpectedValue()
+        {
+            // Arrange
+            var formId = "formId";
+            var expectedResult = $"<script>function submit{formId}(token){{document.getElementById('{formId}').submit();}}</script>";
+
+            // Act
+            var result = CallbackScriptTagHelperComponent.CallbackScript(formId);
+
+            // Assert
+            Assert.AreEqual(expectedResult, result);
+        }
+
+        [Test]
+        public void Process_ShouldAppendScript_WhenTagIsBody()
+        {
+            // Arrange
+            var formId = "formId";
+            var comp = new CallbackScriptTagHelperComponent(formId);
+            var context = new TagHelperContext("body", new TagHelperAttributeList(),
+                new Dictionary<object, object>(),
+                Guid.NewGuid().ToString("N"));
+
+            // Act
+            comp.Process(context, _tagHelperOutput);
+
+            // Assert
+            Assert.IsTrue(_tagHelperOutput.PostContent.GetContent().Contains(CallbackScriptTagHelperComponent.CallbackScript(formId)));
+        }
+
+        [Test]
+        public void Process_ShouldSkip_WhenTagIsNotBody()
+        {
+            // Arrange
+            var formId = "formId";
+            var comp = new CallbackScriptTagHelperComponent(formId);
+            var context = new TagHelperContext("head", new TagHelperAttributeList(),
+                new Dictionary<object, object>(),
+                Guid.NewGuid().ToString("N"));
+
+            // Act
+            comp.Process(context, _tagHelperOutput);
+
+            // Assert
+            Assert.IsTrue(_tagHelperOutput.PostContent.IsEmptyOrWhiteSpace);
+        }
+    }
+}