public void CanReadWriteNegative()
{
var value = Math.Abs(_fixture.Create <int>()) * -1;
var sut = new DbaseNullableInt32(
new DbaseField(
_fixture.Create <DbaseFieldName>(),
_fixture.GenerateDbaseInt32FieldType(),
ByteOffset.Initial,
new DbaseFieldLength(value.ToString(CultureInfo.InvariantCulture).Length),
new DbaseDecimalCount(0)
),
value
);
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
sut.Write(writer);
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
var result = new DbaseNullableInt32(sut.Field);
result.Read(reader);
Assert.Equal(sut.Field, result.Field);
Assert.Equal(sut.Value, result.Value);
}
}
}
public void LengthOfValueBeingSetCanNotExceedFieldLength()
{
var maxLength = new DbaseFieldLength(
int.MaxValue.ToString(CultureInfo.InvariantCulture).Length - 1
// because it's impossible to create a value longer than this (we need the test to generate a longer value)
);
var length = _fixture.GenerateDbaseInt32LengthLessThan(maxLength);
var sut =
new DbaseNullableInt32(
new DbaseField(
_fixture.Create <DbaseFieldName>(),
_fixture.GenerateDbaseInt32FieldType(),
_fixture.Create <ByteOffset>(),
length,
new DbaseDecimalCount(0)
)
);
var value = Enumerable
.Range(0, sut.Field.Length.ToInt32())
.Aggregate(1, (current, _) => current * 10);
Assert.Throws <FormatException>(() => sut.Value = value);
}
public void CanReadWriteNull()
{
var sut = _fixture.Create <DbaseNullableInt32>();
sut.Value = null;
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
sut.Write(writer);
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
var result = new DbaseNullableInt32(sut.Field);
result.Read(reader);
Assert.Equal(sut.Field, result.Field);
Assert.Equal(sut.Value, result.Value);
}
}
}
public int?GenerateAcceptableValue(DbaseNullableInt32 value)
{
var result = default(int?);
switch (_random.Next() % 3)
{
//case 0: null
case 1:
result = GeneratePositiveNullableInt32Value(value.Field);
break;
case 2:
result = GenerateNegativeNullableInt32Value(value.Field);
break;
}
return(result);
}
public void CanNotReadPastEndOfStream()
{
var sut = _fixture.Create <DbaseNullableInt32>();
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
writer.Write(_fixture.CreateMany <byte>(new Random().Next(0, sut.Field.Length.ToInt32())).ToArray());
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
var result = new DbaseNullableInt32(sut.Field);
Assert.Throws <EndOfStreamException>(() => result.Read(reader));
}
}
}
public void Visit(DbaseNullableInt32 value)
{
value.Value = _generator.GenerateAcceptableValue(value);
}
public void Visit(DbaseNullableInt32 value)
{
HashCode = value.Value?.GetHashCode() ?? 0;
}
public void Visit(DbaseNullableInt32 value)
{
Comparer = new DelegatingDbaseFieldValueEqualityComparer <DbaseNullableInt32>(
new DbaseNullableInt32EqualityComparer());
}
