powertools-lambda-dotnet/libraries/tests/AWS.Lambda.Powertools.Logging.Tests/Context/LambdaContextTest.cs at 05c925a5f4a329cc38df99fcd6c467a080d20f39 · jihed-garaouch/powertools-lambda-dotnet · GitHub

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using System;
using System.Reflection;
using Amazon.Lambda.Core;
using Amazon.Lambda.TestUtilities;
using AWS.Lambda.Powertools.Common;
using AWS.Lambda.Powertools.Logging.Internal;
using NSubstitute;
using Xunit;

namespace AWS.Lambda.Powertools.Logging.Tests.Context;

public class LambdaContextTest
{
     [Fact]
     public void Extract_WhenHasLambdaContextArgument_InitializesLambdaContextInfo()
     {
         // Arrange
         var lambdaContext = new TestLambdaContext
         {
             AwsRequestId = Guid.NewGuid().ToString(),
             FunctionName = Guid.NewGuid().ToString(),
             FunctionVersion = Guid.NewGuid().ToString(),
             InvokedFunctionArn = Guid.NewGuid().ToString(),
             LogGroupName = Guid.NewGuid().ToString(),
             LogStreamName = Guid.NewGuid().ToString(),
             MemoryLimitInMB = new Random().Next(),
             TenantId = Guid.NewGuid().ToString()
         };

         var args = Substitute.For<AspectEventArgs>();
         var method = Substitute.For<MethodInfo>();
         var parameter = Substitute.For<ParameterInfo>();

         // Setup parameter
         parameter.ParameterType.Returns(typeof(ILambdaContext));

         // Setup method
         method.GetParameters().Returns(new[] { parameter });

         // Setup args
         args.Method = method;
         args.Args = new object[] { lambdaContext };

         // Act && Assert
         LoggingLambdaContext.Clear();
         Assert.Null(LoggingLambdaContext.Instance);
         Assert.True(LoggingLambdaContext.Extract(args));
         Assert.NotNull(LoggingLambdaContext.Instance);
         Assert.Equal(LoggingLambdaContext.Instance.AwsRequestId, lambdaContext.AwsRequestId);
         Assert.Equal(LoggingLambdaContext.Instance.FunctionName, lambdaContext.FunctionName);
         Assert.Equal(LoggingLambdaContext.Instance.FunctionVersion, lambdaContext.FunctionVersion);
         Assert.Equal(LoggingLambdaContext.Instance.InvokedFunctionArn, lambdaContext.InvokedFunctionArn);
         Assert.Equal(LoggingLambdaContext.Instance.LogGroupName, lambdaContext.LogGroupName);
         Assert.Equal(LoggingLambdaContext.Instance.LogStreamName, lambdaContext.LogStreamName);
         Assert.Equal(LoggingLambdaContext.Instance.MemoryLimitInMB, lambdaContext.MemoryLimitInMB);
         Assert.Equal(LoggingLambdaContext.Instance.TenantId, lambdaContext.TenantId);
         LoggingLambdaContext.Clear();
         Assert.Null(LoggingLambdaContext.Instance);
     }

     [Fact]
     public void Extract_When_LambdaContext_Is_Null_But_Not_First_Parameter_Returns_False()
     {
         // Arrange
         ILambdaContext lambdaContext = null;
         var args = Substitute.For<AspectEventArgs>();
         var method = Substitute.For<MethodInfo>();
         var parameter1 = Substitute.For<ParameterInfo>();
         var parameter2 = Substitute.For<ParameterInfo>();

         // Setup parameters
         parameter1.ParameterType.Returns(typeof(string));
         parameter2.ParameterType.Returns(typeof(ILambdaContext));

         // Setup method
         method.GetParameters().Returns(new[] { parameter1, parameter2 });

         // Setup args
         args.Method = method;
         args.Args = new object[] { "requestContext", lambdaContext };

         // Act && Assert
         LoggingLambdaContext.Clear();
         Assert.Null(LoggingLambdaContext.Instance);
         Assert.False(LoggingLambdaContext.Extract(args));
     }

     [Fact]
     public void Extract_When_Args_Null_Returns_False()
     {
         // Arrange
         var args = Substitute.For<AspectEventArgs>();

         // Act && Assert
         LoggingLambdaContext.Clear();
         Assert.Null(LoggingLambdaContext.Instance);
         Assert.False(LoggingLambdaContext.Extract(args));
     }

     [Fact]
     public void Extract_When_Method_Null_Returns_False()
     {
         // Arrange
         var args = Substitute.For<AspectEventArgs>();
         args.Args = Array.Empty<object>();

         // Act && Assert
         LoggingLambdaContext.Clear();
         Assert.Null(LoggingLambdaContext.Instance);
         Assert.False(LoggingLambdaContext.Extract(args));
     }

     [Fact]
     public void Extract_WhenInstance_Already_Created_Returns_False()
     {
         // Arrange
         var lambdaContext = new TestLambdaContext
         {
             AwsRequestId = Guid.NewGuid().ToString(),
             FunctionName = Guid.NewGuid().ToString(),
             FunctionVersion = Guid.NewGuid().ToString(),
             InvokedFunctionArn = Guid.NewGuid().ToString(),
             LogGroupName = Guid.NewGuid().ToString(),
             LogStreamName = Guid.NewGuid().ToString(),
             MemoryLimitInMB = new Random().Next(),
             TenantId = Guid.NewGuid().ToString()
         };

         var args = Substitute.For<AspectEventArgs>();
         var method = Substitute.For<MethodInfo>();
         var parameter = Substitute.For<ParameterInfo>();

         // Setup parameter
         parameter.ParameterType.Returns(typeof(ILambdaContext));

         // Setup method
         method.GetParameters().Returns(new[] { parameter });

         // Setup args
         args.Method = method;
         args.Args = new object[] { lambdaContext };

         // Act && Assert
         LoggingLambdaContext.Clear();
         Assert.Null(LoggingLambdaContext.Instance);
         Assert.True(LoggingLambdaContext.Extract(args));
         Assert.NotNull(LoggingLambdaContext.Instance);
         Assert.False(LoggingLambdaContext.Extract(args));
     }
}