private static IDataGenerator <string> ResolveStringDataGenerator(IEnumerable <DataGenerationHint> hints)
{
int minLength = hints.Max <MinLengthHint, int>(-1);
int maxLength = hints.Min <MaxLengthHint, int>(minLength);
if (minLength == -1 && maxLength == -1)
{
return(PrimitiveGenerators.Sequence <string>());
}
if (minLength == -1)
{
minLength = 0;
}
return(PrimitiveGenerators.StringSequence(minLength, maxLength));
}
private static IDataGenerator <byte[]> ResolveBinaryDataGenerator(IEnumerable <DataGenerationHint> hints)
{
int minLength = hints.Max <MinLengthHint, int>(-1);
int maxLength = hints.Min <MaxLengthHint, int>(minLength);
if (minLength == -1 && maxLength == -1)
{
return(PrimitiveGenerators.BinarySequence());
}
if (minLength == -1)
{
minLength = 0;
}
return(PrimitiveGenerators.BinarySequence(minLength, maxLength));
}
/// <summary>
/// Resolves data generator which generates random data.
/// </summary>
/// <param name="clrType">The type of the data.</param>
/// <param name="random">Random number generator.</param>
/// <param name="hints">Data generation hints.</param>
/// <returns>The random data generator.</returns>
public IDataGenerator ResolveRandomDataGenerator(Type clrType, IRandomNumberGenerator random, params DataGenerationHint[] hints)
{
ExceptionUtilities.CheckArgumentNotNull(clrType, "clrType");
ExceptionUtilities.CheckArgumentNotNull(random, "random");
ExceptionUtilities.CheckArgumentNotNull(hints, "hints");
ExceptionUtilities.CheckAllRequiredDependencies(this);
bool isNullable;
var originalClrType = clrType;
if (clrType.IsGenericType() && clrType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
clrType = clrType.GetGenericArguments()[0];
isNullable = true;
}
else
{
isNullable = clrType.IsClass();
}
if (hints.OfType <AllNullsHint>().Any())
{
ExceptionUtilities.Assert(isNullable, "Cannot use all-nulls hint with non-nullable type. Type was: '{0}'", originalClrType);
return(PrimitiveGenerators.Default(originalClrType));
}
Func <IRandomNumberGenerator, DataGenerationHint[], bool, IDataGenerator> createDataGen;
if (!this.dataGeneratorCreators.TryGetValue(clrType, out createDataGen))
{
throw new TaupoNotSupportedException(
string.Format(CultureInfo.InvariantCulture, "Creating data generator for the type '{0}' is not supported by this resolver.", clrType.FullName));
}
return(createDataGen(random, hints, isNullable));
}