public void EntryDoesNotExist()
        {
            var dataFolder = "C:/DataFolder";
            var modPaths   = new ModKey[]
            {
                TestConstants.MasterModKey,
                TestConstants.MasterModKey2,
                TestConstants.MasterModKey3,
            }
            .Select(x => ModPath.FromPath(Path.Combine(dataFolder, x.FileName)))
            .ToArray();
            var fs = new MockFileSystem(
                modPaths
                .Skip(1)
                .ToDictionary(x => (string)x.Path, x => new MockFileData(string.Empty)));
            var importer = Substitute.For <IModImporter <TestMod> >();

            foreach (var modPath in modPaths)
            {
                importer.Import(modPath).Returns(new TestMod(modPath.ModKey));
            }
            var lo = new LoadOrderImporter <TestMod>(
                fs,
                new DataDirectoryInjection(dataFolder),
                new LoadOrderListingsInjection(modPaths.Select(x => x.ModKey).ToArray()),
                importer)
                     .Import();

            lo.Count.Should().Be(3);
            lo.First().Value.Mod.Should().BeNull();
            lo.First().Value.ModKey.Should().Be(TestConstants.MasterModKey);
            lo.Select(x => x.Value.Mod)
            .Skip(1)
            .Should().Equal(
                modPaths
                .Skip(1)
                .Select(x => importer.Import(x)));
        }