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using System;
using System.IO;
using System.IO.Pipelines;
using System.Text;
using System.Threading.Tasks;
using BencodeNET.Objects;
using FluentAssertions;
using Xunit;
namespace BencodeNET.Tests.Objects
{
public class BNumberTests
{
private static readonly DateTime Epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
[Fact]
public void Constructor_DateTime_ValueIsUnixFormat()
{
var bnumber = new BNumber(new DateTime(2016, 1, 1));
bnumber.Value.Should().Be(1451606400);
}
[Fact]
public void Constructor_DateTime_NullParameter_ValueIsZero()
{
var bnumber = new BNumber((DateTime?)null);
bnumber.Value.Should().Be(0);
}
[Theory]
[AutoMockedData(0, 0)]
[AutoMockedData(42, 42)]
[AutoMockedData(-1, -1)]
public void Equals_SameNumbersShouldBeEqual(long num1, long num2)
{
var bnumber1 = new BNumber(num1);
var bnumber2 = new BNumber(num2);
bnumber1.Equals(bnumber2).Should().BeTrue();
}
[Theory]
[AutoMockedData(1, 2)]
[AutoMockedData(10, 20)]
[AutoMockedData(-1, 1)]
public void Equals_DifferentNumbersShouldNotBeEqual(long num1, long num2)
{
var bnumber1 = new BNumber(num1);
var bnumber2 = new BNumber(num2);
bnumber1.Equals(bnumber2).Should().BeFalse();
}
[Theory]
[AutoMockedData(0, 0)]
[AutoMockedData(42, 42)]
[AutoMockedData(-1, -1)]
public void EqualsOperator_Integer_SameNumberShouldBeEqual(long num1, long num2)
{
var bnumber = new BNumber(num1);
(bnumber == num2).Should().BeTrue();
}
[Theory]
[AutoMockedData(1)]
[AutoMockedData(10)]
[AutoMockedData(42)]
[AutoMockedData(long.MaxValue)]
public void GetHashCode_SameAsInt64HashCode(long number)
{
var bnumber = new BNumber(number);
var hash1 = bnumber.GetHashCode();
var hash2 = number.GetHashCode();
hash1.Should().Be(hash2);
}
#region Encode
[Theory]
[AutoMockedData(1)]
[AutoMockedData(10)]
[AutoMockedData(42)]
[AutoMockedData(123)]
[AutoMockedData(123456789)]
public void CanEncode(long value)
{
var bnumber = new BNumber(value);
var bencode = bnumber.EncodeAsString();
bencode.Should().Be($"i{value}e");
}
[Theory]
[AutoMockedData(-1)]
[AutoMockedData(-10)]
[AutoMockedData(-42)]
[AutoMockedData(-123)]
[AutoMockedData(-123456789)]
public void CanEncode_Negative(long value)
{
var bnumber = new BNumber(value);
var bencode = bnumber.EncodeAsString();
bencode.Should().Be($"i{value}e");
}
[Fact]
public void CanEncode_Zero()
{
var bnumber = new BNumber(0);
var bencode = bnumber.EncodeAsString();
bencode.Should().Be("i0e");
}
[Fact]
public void CanEncode_Int64MinValue()
{
var bnumber = new BNumber(-9223372036854775808);
var bencode = bnumber.EncodeAsString();
bencode.Should().Be("i-9223372036854775808e");
}
[Fact]
public void CanEncode_Int64MaxValue()
{
var bnumber = new BNumber(9223372036854775807);
var bencode = bnumber.EncodeAsString();
bencode.Should().Be("i9223372036854775807e");
}
[Fact]
public void CanEncodeToStream()
{
var bnumber = new BNumber(42);
using (var stream = new MemoryStream())
{
bnumber.EncodeTo(stream);
stream.Length.Should().Be(4);
stream.AsString().Should().Be("i42e");
}
}
[Fact]
public void CanEncodeAsBytes()
{
var bnumber = new BNumber(42);
var expected = Encoding.ASCII.GetBytes("i42e");
var bytes = bnumber.EncodeAsBytes();
bytes.Should().BeEquivalentTo(expected);
}
#endregion
[Fact]
public void ToString_SameAsLong()
{
var bnumber = new BNumber(42);
var str1 = bnumber.ToString();
var str2 = 42L.ToString();
str1.Should().Be(str2);
}
[Fact]
public void ToString_WithFormat_SameAsLong()
{
var bnumber = new BNumber(42);
var str1 = bnumber.ToString("N2");
var str2 = 42L.ToString("N2");
str1.Should().Be(str2);
}
#region Casts
[Fact]
public void CanCastFromInt()
{
int number = 12345;
var bnumber = (BNumber)number;
bnumber.Should().Be(12345);
}
[Fact]
public void CanCastFromLong()
{
long number = 12345;
var bnumber = (BNumber)number;
bnumber.Should().Be(12345);
}
[Fact]
public void CanCastFromNullableInt_WhenNull()
{
int? number = null;
var bnumber = (BNumber)number;
bnumber.Should().BeNull();
}
[Fact]
public void CanCastFromNullableLong_WhenNull()
{
long? number = null;
var bnumber = (BNumber)number;
bnumber.Should().BeNull();
}
[Fact]
public void CanCastFromNullableInt_WhenNotNull()
{
int? number = 12345;
var bnumber = (BNumber)number;
bnumber.Should().Be(12345);
}
[Fact]
public void CanCastFromNullableLong_WhenNotNull()
{
long? number = 12345;
var bnumber = (BNumber)number;
bnumber.Should().Be(12345);
}
[Fact]
public void CanCastToInt()
{
BNumber bnumber = new BNumber(12345);
int number = (int)bnumber;
number.Should().Be(12345);
}
[Fact]
public void CanCastToLong()
{
BNumber bnumber = new BNumber(12345);
long number = (long)bnumber;
number.Should().Be(12345);
}
[Fact]
public void CanCastToNullableInt_WhenNull()
{
BNumber bnumber = null;
var number = (int?)bnumber;
number.Should().BeNull();
}
[Fact]
public void CanCastToNullableLong_WhenNull()
{
BNumber bnumber = null;
var number = (long?)bnumber;
number.Should().BeNull();
}
[Fact]
public void CanCastToNullableInt_WhenNotNull()
{
BNumber bnumber = 12345;
var number = (int?)bnumber;
number.Should().Be(12345);
}
[Fact]
public void CanCastToNullableLong_WhenNotNull()
{
BNumber bnumber = 12345;
var number = (long?)bnumber;
number.Should().Be(12345);
}
[Fact]
public void CanCastFromDateTime()
{
var bnumber = (BNumber) new DateTime(2016, 1, 1);
bnumber.Should().Be(1451606400);
}
[Fact]
public void CanCastToDateTime()
{
var bnumber = new BNumber(1451606400);
var datetime = (DateTime) bnumber;
datetime.Should().Be(new DateTime(2016, 1, 1));
}
[Fact]
public void CastingFromBool_False_IsZero()
{
var bnumber = (BNumber) false;
bnumber.Should().Be(0);
}
[Fact]
public void CastingFromBool_True_IsOne()
{
var bnumber = (BNumber)true;
bnumber.Should().Be(1);
}
[Theory]
[AutoMockedData(0)]
[AutoMockedData(-1)]
[AutoMockedData(-42)]
[AutoMockedData(-123456)]
public void CastingToBool_BelowOrEqualToZero_ShouldBeFalse(int number)
{
var boolean = (bool) new BNumber(number);
boolean.Should().BeFalse();
}
[Theory]
[AutoMockedData(1)]
[AutoMockedData(10)]
[AutoMockedData(42)]
[AutoMockedData(123456)]
public void CastingToBool_AboveZero_ShouldBeTrue(int number)
{
var boolean = (bool) new BNumber(number);
boolean.Should().BeTrue();
}
[Fact]
public void CastingToBool_Null_ThrowsInvalidCastException()
{
BNumber bnumber = null;
Action action = () => { var b = (bool) bnumber; };
action.Should().Throw<InvalidCastException>();
}
#endregion
[Fact]
public void GetSizeInBytes()
{
var bnumber = new BNumber(42);
bnumber.GetSizeInBytes().Should().Be(4);
}
[Fact]
public async Task WriteToPipeWriter()
{
var bnumber = new BNumber(1234);
var (reader, writer) = new Pipe();
bnumber.EncodeTo(writer);
await writer.FlushAsync();
reader.TryRead(out var readResult);
var result = Encoding.UTF8.GetString(readResult.Buffer.First.Span.ToArray());
result.Should().Be("i1234e");
}
[Fact]
public async Task WriteToPipeWriterAsync()
{
var bnumber = new BNumber(1234);
var (reader, writer) = new Pipe();
await bnumber.EncodeToAsync(writer);
reader.TryRead(out var readResult);
var result = Encoding.UTF8.GetString(readResult.Buffer.First.Span.ToArray());
result.Should().Be("i1234e");
}
[Fact]
public async Task WriteToStreamAsync()
{
var bnumber = new BNumber(1234);
var ms = new MemoryStream();
await bnumber.EncodeToAsync(ms);
var result = Encoding.UTF8.GetString(ms.ToArray());
result.Should().Be("i1234e");
}
}
}