public void LengthOfValueBeingSetCanNotExceedFieldLength()
{
var maxLength = new DbaseFieldLength(
short.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.GenerateDbaseInt16LengthLessThan(maxLength);
var sut =
new DbaseInt16(
new DbaseField(
_fixture.Create <DbaseFieldName>(),
_fixture.GenerateDbaseInt16FieldType(),
_fixture.Create <ByteOffset>(),
length,
new DbaseDecimalCount(0)
)
);
var value = Convert.ToInt16(Enumerable
.Range(0, sut.Field.Length.ToInt32())
.Aggregate(1, (current, _) => current * 10));
Assert.Throws <FormatException>(() => sut.Value = value);
}
public void CanReadWriteNegative()
{
var value = Convert.ToInt16(Math.Abs(_fixture.Create <short>()) * -1);
var sut = new DbaseInt16(
new DbaseField(
_fixture.Create <DbaseFieldName>(),
_fixture.GenerateDbaseInt16FieldType(),
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 DbaseInt16(sut.Field);
result.Read(reader);
Assert.Equal(sut.Field, result.Field);
Assert.Equal(sut.Value, result.Value);
}
}
}
public void CanReadWriteNull()
{
_fixture.CustomizeDbaseInt16WithoutValue();
var sut = _fixture.Create <DbaseInt16>();
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 DbaseInt16(sut.Field);
result.Read(reader);
Assert.Equal(sut.Field, result.Field);
Assert.Throws <FormatException>(() => result.Value);
}
}
}
public bool AcceptsValue(short?value)
{
if (value.HasValue)
{
return(DbaseInt16.FormatAsString(value.Value).Length <= Field.Length.ToInt32());
}
return(true);
}
public static void WriteAsNullableInt16(this BinaryWriter writer, DbaseField field, short?value)
{
if (value.HasValue)
{
var unpadded = DbaseInt16.FormatAsString(value.Value);
writer.WriteLeftPaddedString(unpadded, field.Length.ToInt32(), ' ');
}
else
{
writer.Write(new string(' ', field.Length.ToInt32()).ToCharArray());
// or writer.Write(new byte[Field.Length]); // to determine
}
}
public short GenerateAcceptableValue(DbaseInt16 value)
{
var result = default(short);
switch (_random.Next() % 3)
{
case 0:
result = GeneratePositiveInt16Value(value.Field);
break;
case 1:
result = GenerateNegativeInt16Value(value.Field);
break;
}
return(result);
}
public void CanNotReadPastEndOfStream()
{
var sut = _fixture.Create <DbaseInt16>();
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 DbaseInt16(sut.Field);
Assert.Throws <EndOfStreamException>(() => result.Read(reader));
}
}
}
public short?GenerateAcceptableValue(DbaseInt16 value)
{
if (value.Field.Length == new DbaseFieldLength(0))
{
return(null);
}
var result = default(short?);
switch (_random.Next() % 3)
{
//case 0: null
case 1:
result = GeneratePositiveInt16Value(value.Field);
break;
case 2:
result = GenerateNegativeInt16Value(value.Field);
break;
}
return(result);
}
public static void CustomizeDbaseInt16(this IFixture fixture)
{
fixture.Customize <DbaseInt16>(
customization =>
customization
.FromNumberGenerator(
generator =>
{
var fieldType = fixture.GenerateDbaseInt16FieldType();
var length = fixture.GenerateDbaseInt16Length(fieldType);
var field = new DbaseField(
fixture.Create <DbaseFieldName>(),
fieldType,
fixture.Create <ByteOffset>(),
length,
new DbaseDecimalCount(0)
);
var value = new DbaseInt16(field);
value.Value = generator.GenerateAcceptableValue(value);
return(value);
}
)
.OmitAutoProperties());
}
public void CanReadWrite()
{
var sut = _fixture.Create <DbaseInt16>();
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 DbaseInt16(sut.Field);
result.Read(reader);
Assert.Equal(sut.Field, result.Field);
Assert.Equal(sut.Value, result.Value);
}
}
}
public void Visit(DbaseInt16 value)
{
value.Value = _generator.GenerateAcceptableValue(value);
}
public void Inspect(DbaseInt16 value)
{
HashCode = value.Value.HasValue
? value.Value.Value.GetHashCode()
: 0;
}
public void Inspect(DbaseInt16 value)
{
Value = value.Value;
}
public void Inspect(DbaseInt16 value)
{
Comparer = new DelegatingDbaseFieldValueEqualityComparer <DbaseInt16>(
new DbaseInt16EqualityComparer());
}
public void Visit(DbaseInt16 value)
{
HashCode = value.Value.GetHashCode();
}
