WireMock.Net/test/WireMock.Net.Tests/Util/FileHelperTests.cs

using FluentAssertions;
using Moq;
using System;
using WireMock.Handlers;
using WireMock.Util;
using Xunit;

namespace WireMock.Net.Tests.Util
{
    public class FileHelperTests
    {
        [Fact]
        public void TryReadMappingFileWithRetryAndDelay_WithIFileSystemHandlerOk_ReturnsTrue()
        {
            // Assign
            var staticMappingHandlerMock = new Mock<IFileSystemHandler>();
            staticMappingHandlerMock.Setup(m => m.ReadMappingFile(It.IsAny<string>())).Returns("text");

            // Act
            bool result = FileHelper.TryReadMappingFileWithRetryAndDelay(staticMappingHandlerMock.Object, @"c:\temp", out string value);

            // Assert
            result.Should().BeTrue();
            value.Should().Be("text");

            // Verify
            staticMappingHandlerMock.Verify(m => m.ReadMappingFile(@"c:\temp"), Times.Once);
        }

        [Fact]
        public void TryReadMappingFileWithRetryAndDelay_WithIFileSystemHandlerThrows_ReturnsFalse()
        {
            // Assign
            var staticMappingHandlerMock = new Mock<IFileSystemHandler>();
            staticMappingHandlerMock.Setup(m => m.ReadMappingFile(It.IsAny<string>())).Throws<NotSupportedException>();

            // Act
            bool result = FileHelper.TryReadMappingFileWithRetryAndDelay(staticMappingHandlerMock.Object, @"c:\temp", out string value);

            // Assert
            result.Should().BeFalse();
            value.Should().BeNull();

            // Verify
            staticMappingHandlerMock.Verify(m => m.ReadMappingFile(@"c:\temp"), Times.Exactly(3));
        }
    }
}