Add project files.

test/integration/Elsa.Workflows.IntegrationTests/Activities/If/IfTests.cs

@@ -0,0 +1,59 @@
+using Elsa.Testing.Shared;
+using Elsa.Workflows.Activities;
+using Microsoft.Extensions.DependencyInjection;
+using Xunit.Abstractions;
+
+namespace Elsa.Workflows.IntegrationTests.Activities;
+
+public class IfTests
+{
+    private readonly IWorkflowRunner _workflowRunner;
+    private readonly CapturingTextWriter _capturingTextWriter = new();
+    private readonly IServiceProvider _services;
+
+    public IfTests(ITestOutputHelper testOutputHelper)
+    {
+        _services = new TestApplicationBuilder(testOutputHelper).WithCapturingTextWriter(_capturingTextWriter).Build();
+        _workflowRunner = _services.GetRequiredService<IWorkflowRunner>();
+    }
+
+    [Theory(DisplayName = "The correct branch executes when condition is true")]
+    [InlineData(true)]
+    [InlineData(false)]
+    public async Task Test1(bool conditionResult)
+    {
+        var result = default(bool?);
+        
+        var activity = new If(() => conditionResult)
+        {
+            Then = new Inline(() => result = true),
+            Else = new Inline(() => result = false)
+        };
+        await _services.RunActivityAsync(activity);
+        Assert.Equal(conditionResult, result);
+    }
+
+    [Theory(DisplayName = "The If activity completes only after either one of its branches completed")]
+    [InlineData(true)]
+    [InlineData(false)]
+    public async Task Test2(bool conditionResult)
+    {
+        var activity = new If(() => conditionResult)
+        {
+            Then = new Inline(),
+            Else = new Inline()
+        };
+        var result = await _services.RunActivityAsync(activity);
+        Assert.Equal(WorkflowStatus.Finished, result.WorkflowState.Status);
+    }
+    
+    [Fact(DisplayName = "The If activity produces a result when one of its branches completes")]
+    public async Task Test3()
+    {
+        var activity = new If(() => true);
+        var result = await _services.RunActivityAsync(activity);
+        var activityResult = result.GetActivityOutput<bool>(activity);
+        
+        Assert.True(activityResult);
+    }
+}