public void GetVariableBlock()
        {
            var provider = new Mock<BaseCommandLineVersionControlProvider>();
            provider.Setup(controlProvider =>
                controlProvider.BuildCommandLineArguments(It.IsAny<VersionControlArguments>()))
                .Returns("args");
            provider.SetupGet(vcp => vcp.FileName).Returns("VcsExecutable.exe");

            var args = new VersionControlArguments
            {
                Credentials = new NetworkCredential("username", "password"),
                DestinationPath = "D:\\WorkingFolder\\MyProject",
                Label = "My Label",
                Operation = VersionControlOperation.Get,
                Project = "MyProject",
                Provider = "Vault",
                Server = "server:port",
                SourcePath = "$/MyProject"
            };
            var indexer = new SourceIndexer(provider.Object, args);

            var block = indexer.GetVariableBlock();

            Assert.AreEqual(@"SRCSRV: variables ------------------------------------------
            VCS_EXECUTABLE=VcsExecutable.exe
            VCS_USERNAME=username
            VCS_PASSWORD=password
            VCS_SERVER=server:port
            VCS_PROJECT=MyProject
            SRCSRVTRG=%VCS_EXTRACT_TARGET%
            VCS_EXTRACT_CMD=""%VCS_EXECUTABLE%"" args
            SRCSRVCMD=%VCS_EXTRACT_CMD%
            VCS_EXTRACT_TARGET=" + SourceIndexer.VcsDestinationPath + "\r\n", block, ignoreCase: true);
        }