public void Should_Mask_Dynamic_PersonId_And_EncounterId()
{
DynamicDatasetRecord record = new DynamicDatasetRecord {
Salt = Guid.NewGuid()
};
List <SchemaFieldSelector> fields = new List <SchemaFieldSelector> {
From(personId, true), From(encounterId, true)
};
record.SetValue(personId, "abc123");
record.SetValue(encounterId, "def456");
var pepper = Guid.NewGuid();
var anon = new DynamicAnonymizer(pepper);
anon.Anonymize(record, fields);
var anonPer = record.GetValue(personId);
var anonEnc = record.GetValue(encounterId);
Assert.NotEqual("abc123", anonPer);
Assert.NotEqual("def456", anonEnc);
Assert.NotNull(anonPer);
Assert.NotNull(anonEnc);
}
void Fuzz(DynamicDatasetRecord record, KeyValuePair <string, object> pair)
{
var type = pair.Value.GetType();
if (!TypeMap.TryGetValue(type, out var actor))
{
throw new ArgumentException($"No anonymization actor implemented for type {type.ToString()}");
}
actor(record, pair, record.Salt, Pepper, FuzzParameters);
}
DynamicDatasetRecord GetRecord(SqlDataReader reader, IEnumerable <SchemaFieldSelector> fields)
{
var dyn = new DynamicDatasetRecord
{
Salt = reader.GetGuid(reader.GetOrdinal(DatasetColumns.Salt))
};
foreach (var f in fields)
{
// Ensure Salt is not passed as property
if (!f.Name.Equals(DatasetColumns.Salt, StringComparison.InvariantCultureIgnoreCase))
{
dyn.SetValue(f.Name, reader[f.Name]);
}
}
return(dyn);
}
public void Should_Throw_On_Unmaskable_Phi()
{
DynamicDatasetRecord record = new DynamicDatasetRecord {
Salt = Guid.NewGuid()
};
List <SchemaFieldSelector> fields = new List <SchemaFieldSelector>
{
new SchemaFieldSelector {
Mask = false, Phi = true, Required = true, Type = LeafType.DateTime, Name = dateVal
}
};
record.SetValue(dateVal, new DateTime(2018, 12, 14, 10, 33, 00));
var pepper = Guid.NewGuid();
var anon = new DynamicAnonymizer(pepper);
Assert.Throws <LeafDynamicAnonymizerException>(() => anon.Anonymize(record, fields));
}
public void Should_Throw_On_Maskable_Boolean()
{
DynamicDatasetRecord record = new DynamicDatasetRecord {
Salt = Guid.NewGuid()
};
List <SchemaFieldSelector> fields = new List <SchemaFieldSelector>
{
new SchemaFieldSelector {
Mask = true, Phi = true, Required = true, Type = LeafType.Bool, Name = boolVal
}
};
record.SetValue(boolVal, false);
var pepper = Guid.NewGuid();
var anon = new DynamicAnonymizer(pepper);
Assert.Throws <ArgumentException>(() => anon.Anonymize(record, fields));
}
public void Anonymize(DynamicDatasetRecord record, IEnumerable <SchemaFieldSelector> fields)
{
foreach (var field in fields)
{
var pair = record.GetKeyValuePair(field.Name);
if (field.Phi && !field.Mask)
{
throw new LeafDynamicAnonymizerException(field.Name, $"Phi fields must be maskable.");
}
if (pair.Value == null || pair.Value == DBNull.Value || !field.Mask)
{
continue;
}
Fuzz(record, pair);
}
}
public void Should_Not_Shift_Dynamic_Date_Null()
{
DynamicDatasetRecord record = new DynamicDatasetRecord {
Salt = Guid.NewGuid()
};
List <SchemaFieldSelector> fields = new List <SchemaFieldSelector> {
From(dateVal, true, LeafType.DateTime)
};
record.SetValue(dateVal, null);
var pepper = Guid.NewGuid();
var anon = new DynamicAnonymizer(pepper);
anon.Anonymize(record, fields);
var anonDate = record.GetValue(dateVal);
Assert.Null(anonDate);
}
public void Should_Mask_Carry_PersonId_To_Datum()
{
DynamicDatasetRecord record = new DynamicDatasetRecord {
Salt = Guid.NewGuid()
};
List <SchemaFieldSelector> fields = new List <SchemaFieldSelector> {
From(personId, true)
};
record.SetValue(personId, "abc123");
var pepper = Guid.NewGuid();
var anon = new DynamicAnonymizer(pepper);
anon.Anonymize(record, fields);
var anonDatum = record.ToDatumSet();
Assert.NotEqual("abc123", anonDatum.PersonId);
Assert.NotNull(anonDatum.PersonId);
}
public void Should_Shift_Dynamic_Date_NotNull()
{
DynamicDatasetRecord record = new DynamicDatasetRecord {
Salt = Guid.NewGuid()
};
List <SchemaFieldSelector> fields = new List <SchemaFieldSelector> {
From(dateVal, true, LeafType.DateTime)
};
record.SetValue(dateVal, new DateTime(2018, 12, 14, 10, 33, 00));
var pepper = Guid.NewGuid();
var anon = new DynamicAnonymizer(pepper);
anon.Anonymize(record, fields);
var anonDate = record.GetValue(dateVal);
Assert.NotNull(anonDate);
Assert.NotEqual(new DateTime(2018, 12, 14, 10, 33, 00), anonDate);
Assert.Equal(33, ((DateTime)anonDate).Minute);
}
