using Amphora;
using UnitTestSharp;

namespace Glass.UnitTests
{
    public class InvalidFileNameKindTests : TestFixture
    {
        public static readonly InvalidFileNameKind Kind = FileSystemFailures.InvalidName;

        public class ReadTests : TestFixture
        {
            public void ReturnsEveryPartItFailedWith()
            {
                Status status = Kind.Fail(new InvalidFileName(FileNameProblem.ForbiddenCharacter, "a:b", ':'));

                InvalidFileName problem = Kind.Read(status);

                CheckEqual(FileNameProblem.ForbiddenCharacter, problem.Problem);
                CheckEqual("a:b", problem.Name);
                CheckEqual(':', problem.Character);
            }

            public void HighCharacter_SurvivesThePacking()
            {
                var wide = (char)0xFFFF;
                Status status = Kind.Fail(new InvalidFileName(FileNameProblem.ControlCharacter, "x", wide));

                InvalidFileName problem = Kind.Read(status);

                CheckEqual(FileNameProblem.ControlCharacter, problem.Problem);
                CheckEqual(wide, problem.Character);
            }
        }

        public class DescribeTests : TestFixture
        {
            [IgnoreTest]
            private string Describe(FileNameProblem problem, string name, char character = '\0')
            {
                return Kind.Fail(new InvalidFileName(problem, name, character)).Describe();
            }

            public void Blank_SaysANameCantBeEmpty()
            {
                CheckEqual("A name can't be empty.", Describe(FileNameProblem.Blank, "  "));
            }

            public void DotName_QuotesTheName()
            {
                CheckEqual("'..' isn't a name.", Describe(FileNameProblem.DotName, ".."));
            }

            public void ForbiddenCharacter_QuotesTheCharacter()
            {
                CheckEqual("A name can't contain '/'.", Describe(FileNameProblem.ForbiddenCharacter, "a/b", '/'));
            }

            public void ControlCharacter_SaysSoWithoutShowingIt()
            {
                CheckEqual("A name can't contain control characters.",
                    Describe(FileNameProblem.ControlCharacter, "a\tb", '\t'));
            }

            public void ProblemThisVersionDoesntKnow_QuotesTheName()
            {
                CheckEqual("'odd' isn't a valid name.", Describe((FileNameProblem)99, "odd"));
            }
        }
    }
}