public void Enum_Convert_Into_Linq_Query()
{
var mapper = new BsonMapper();
var c = new Customer {
Id = 1, Type = CustomerType.Loyal
};
mapper.EnumAsInteger = true;
var doc = mapper.ToDocument(c);
doc["Type"].AsInt32.Should().Be(2);
doc["Nullable"].IsNull.Should().BeTrue();
// To use Eum in LINQ expressions, Enum must be integer value (should be EnumAsInteger = true)
var expr1 = mapper.GetExpression <Customer, bool>(x => x.Type == CustomerType.Loyal);
expr1.Parameters["p0"].AsInt32.Should().Be(2);
var expr2 = mapper.GetExpression <Customer, bool>(x => x.NullableType.Value == CustomerType.Loyal);
expr2.Parameters["p0"].AsInt32.Should().Be(2);
}
private void Eval <T, K>(T entity, Expression <Func <T, K> > expr, params K[] expect)
{
var expression = _mapper.GetExpression(expr);
var doc = _mapper.ToDocument <T>(entity);
var results = expression.Execute(doc).ToArray();
var index = 0;
Assert.AreEqual(expect.Length, results.Length);
foreach (var result in results)
{
var exp = _mapper.Serialize(typeof(K), expect[index++]);
Assert.AreEqual(exp, result);
}
}
private BsonExpression Test <T, K>(Expression <Func <T, K> > expr, BsonExpression expect, params BsonValue[] args)
{
var expression = _mapper.GetExpression(expr);
expression.Source.Should().Be(expect.Source);
expression.Parameters.Keys.Count.Should().Be(args.Length, "Number of parameter are different than expected");
var index = 0;
foreach (var par in args)
{
var pval = expression.Parameters["p" + (index++).ToString()];
pval.Should().Be(par, $"Expression: {expect.Source}");
}
return(expression);
}
private BsonExpression Test <T, K>(Expression <Func <T, K> > expr, BsonExpression expect, params BsonValue[] args)
{
var expression = _mapper.GetExpression(expr);
Assert.AreEqual(expect.Source, expression.Source);
Assert.AreEqual(expression.Parameters.Keys.Count, args.Length, "Number of parameter are different than expected");
var index = 0;
foreach (var par in args)
{
var pval = expression.Parameters["p" + (index++).ToString()];
Assert.AreEqual(par, pval, "Expression: " + expect.Source);
}
return(expression);
}