private static object GenerateArray(Type arrayType, int size, Dictionary<Type, object> createdObjectReferences)
{
var type = arrayType.GetElementType();
var result = Array.CreateInstance(type, size);
var areAllElementsNull = true;
var objectGenerator = new ObjectGenerator();
for (var i = 0; i < size; i++)
{
var element = objectGenerator.GenerateObject(type, createdObjectReferences);
result.SetValue(element, i);
areAllElementsNull &= element == null;
}
if (areAllElementsNull)
{
return null;
}
return result;
}
private static object GenerateCollection(Type collectionType, int size, Dictionary<Type, object> createdObjectReferences)
{
var type = collectionType.IsGenericType ?
collectionType.GetGenericArguments()[0] :
typeof(object);
var result = Activator.CreateInstance(collectionType);
var addMethod = collectionType.GetMethod("Add");
var areAllElementsNull = true;
var objectGenerator = new ObjectGenerator();
for (var i = 0; i < size; i++)
{
var element = objectGenerator.GenerateObject(type, createdObjectReferences);
addMethod.Invoke(result, new[] { element });
areAllElementsNull &= element == null;
}
if (areAllElementsNull)
{
return null;
}
return result;
}
private static void SetPublicProperties(Type type, object obj, Dictionary<Type, object> createdObjectReferences)
{
var properties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
var objectGenerator = new ObjectGenerator();
foreach (var property in properties)
{
if (property.CanWrite)
{
var propertyValue = objectGenerator.GenerateObject(property.PropertyType, createdObjectReferences);
property.SetValue(obj, propertyValue, null);
}
}
}
private static void SetPublicFields(Type type, object obj, Dictionary<Type, object> createdObjectReferences)
{
var fields = type.GetFields(BindingFlags.Public | BindingFlags.Instance);
var objectGenerator = new ObjectGenerator();
foreach (var field in fields)
{
var fieldValue = objectGenerator.GenerateObject(field.FieldType, createdObjectReferences);
field.SetValue(obj, fieldValue);
}
}
private static object GenerateTuple(Type type, Dictionary<Type, object> createdObjectReferences)
{
var genericArgs = type.GetGenericArguments();
var parameterValues = new object[genericArgs.Length];
var failedToCreateTuple = true;
var objectGenerator = new ObjectGenerator();
for (var i = 0; i < genericArgs.Length; i++)
{
parameterValues[i] = objectGenerator.GenerateObject(genericArgs[i], createdObjectReferences);
failedToCreateTuple &= parameterValues[i] == null;
}
if (failedToCreateTuple)
{
return null;
}
var result = Activator.CreateInstance(type, parameterValues);
return result;
}
private static object GenerateNullable(Type nullableType, Dictionary<Type, object> createdObjectReferences)
{
var type = nullableType.GetGenericArguments()[0];
var objectGenerator = new ObjectGenerator();
return objectGenerator.GenerateObject(type, createdObjectReferences);
}
private static object GenerateKeyValuePair(Type keyValuePairType, Dictionary<Type, object> createdObjectReferences)
{
var genericArgs = keyValuePairType.GetGenericArguments();
var typeK = genericArgs[0];
var typeV = genericArgs[1];
var objectGenerator = new ObjectGenerator();
var keyObject = objectGenerator.GenerateObject(typeK, createdObjectReferences);
var valueObject = objectGenerator.GenerateObject(typeV, createdObjectReferences);
if (keyObject == null && valueObject == null)
{
// Failed to create key and values
return null;
}
var result = Activator.CreateInstance(keyValuePairType, keyObject, valueObject);
return result;
}
private static object GenerateDictionary(Type dictionaryType, int size, Dictionary<Type, object> createdObjectReferences)
{
var typeK = typeof(object);
var typeV = typeof(object);
if (dictionaryType.IsGenericType)
{
var genericArgs = dictionaryType.GetGenericArguments();
typeK = genericArgs[0];
typeV = genericArgs[1];
}
var result = Activator.CreateInstance(dictionaryType);
var addMethod = dictionaryType.GetMethod("Add") ?? dictionaryType.GetMethod("TryAdd");
var containsMethod = dictionaryType.GetMethod("Contains") ?? dictionaryType.GetMethod("ContainsKey");
var objectGenerator = new ObjectGenerator();
for (var i = 0; i < size; i++)
{
var newKey = objectGenerator.GenerateObject(typeK, createdObjectReferences);
if (newKey == null)
{
// Cannot generate a valid key
return null;
}
var containsKey = (bool)containsMethod.Invoke(result, new[] { newKey });
if (!containsKey)
{
var newValue = objectGenerator.GenerateObject(typeV, createdObjectReferences);
addMethod.Invoke(result, new[] { newKey, newValue });
}
}
return result;
}