public void RecordToString()
{
var myRecord = new MyRecordType {
IntProperty = 42, StringProperty = "foo"
};
Assert.That(myRecord.ToString(), Is.EqualTo("MyRecordType { IntProperty = 42, StringProperty = foo }"));
}
public void BasicRecordProperties()
{
var myRecord = new MyRecordType {
IntProperty = 42, StringProperty = "foo"
};
Assert.That(myRecord.IntProperty, Is.EqualTo(42));
Assert.That(myRecord.StringProperty, Is.EqualTo("foo"));
}
public void RecordsDoNotUseDuckTyping()
{
var recordType1 = new MyRecordType {
IntProperty = 42, StringProperty = "foo"
};
var recordType2 = new ImmutableRecordType {
IntProperty = 42, StringProperty = "foo"
};
Assert.That(recordType1.Equals(recordType2), Is.False);
//The compiler already knows that these two records are different types,
//so the following line results in a compiler error.
//Assert.That(recordType1 == recordType2, Is.False);
}
public void ShallowPropertyEquality()
{
var firstRecord = new MyRecordType {
IntProperty = 42, StringProperty = "foo"
};
var secondRecord = new MyRecordType {
IntProperty = 42, StringProperty = "foo"
};
Assert.That(firstRecord.Equals(secondRecord), Is.EqualTo(true));
Assert.That(firstRecord == secondRecord, Is.True);
Assert.That(firstRecord.GetHashCode(), Is.EqualTo(secondRecord.GetHashCode()));
//You can mess up Equality and GetHashCode if you try, but
//by default they will work like your record type is a value type.
}
public void AlternateRecordDeclarationSyntax()
{
var autoPropertySyntaxRecord = new MyRecordType {
IntProperty = 42
};
//All properties declared in the constructor are required,
//unless they have default values specified.
var constructorSyntaxRecord = new ConstructorSyntaxRecordType(42);
//Properties declared with the constructor syntax are readonly,
//so the following line results in a compiler error.
//constructorSyntaxRecord.IntProperty = 43;
Assert.That(constructorSyntaxRecord.IntProperty, Is.EqualTo(42));
Assert.That(constructorSyntaxRecord.StringProperty, Is.EqualTo("foo"));
}
public void ImmutableRecords()
{
var mutableRecord = new MyRecordType {
IntProperty = 42
};
var immutableRecord = new ImmutableRecordType {
IntProperty = 42
};
mutableRecord.IntProperty = 43;
//The following line results in a compiler error.
//immutableRecord.IntProperty = 43;
Assert.That(mutableRecord.IntProperty, Is.EqualTo(43));
Assert.That(immutableRecord.IntProperty, Is.EqualTo(42));
}
