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using FluentAssertions;
using System;
using Timeline.Services;
using Xunit;
namespace Timeline.Tests
{
public class UsernameValidatorUnitTest : IClassFixture<UsernameValidator>
{
private readonly UsernameValidator _validator;
public UsernameValidatorUnitTest(UsernameValidator validator)
{
_validator = validator;
}
[Fact]
public void NullShouldThrow()
{
_validator.Invoking(v => v.Validate(null, out string message)).Should().Throw<ArgumentNullException>();
}
private string FailAndMessage(string username)
{
var result = _validator.Validate(username, out var message);
result.Should().BeFalse();
return message;
}
private void Succeed(string username)
{
_validator.Validate(username, out var message).Should().BeTrue();
message.Should().BeNull();
}
[Fact]
public void Empty()
{
FailAndMessage("").Should().ContainEquivalentOf("empty");
}
[Fact]
public void WhiteSpace()
{
FailAndMessage(" ").Should().ContainEquivalentOf("whitespace");
FailAndMessage("\t").Should().ContainEquivalentOf("whitespace");
FailAndMessage("\n").Should().ContainEquivalentOf("whitespace");
FailAndMessage("a b").Should().ContainEquivalentOf("whitespace");
FailAndMessage("a\tb").Should().ContainEquivalentOf("whitespace");
FailAndMessage("a\nb").Should().ContainEquivalentOf("whitespace");
}
[Fact]
public void BadCharactor()
{
FailAndMessage("!").Should().ContainEquivalentOf("regex");
FailAndMessage("!abc").Should().ContainEquivalentOf("regex");
FailAndMessage("ab!c").Should().ContainEquivalentOf("regex");
}
[Fact]
public void BadBegin()
{
FailAndMessage("-").Should().ContainEquivalentOf("regex");
FailAndMessage("-abc").Should().ContainEquivalentOf("regex");
}
[Fact]
public void TooLong()
{
FailAndMessage(new string('a', 40)).Should().ContainEquivalentOf("long");
}
[Fact]
public void Success()
{
Succeed("abc");
Succeed("_abc");
Succeed("a-bc");
Succeed("a-b-c");
Succeed("a-b_c");
}
}
}
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