public SqlVariableExpressionTests()
{
var scope = new ServiceContainer();
var manager = new VariableManager();
manager.CreateVariable(new VariableInfo("a", PrimitiveTypes.Boolean(), false, SqlExpression.Constant(SqlObject.Boolean(false))));
manager.CreateVariable(new VariableInfo("b", PrimitiveTypes.VarChar(150), false, null));
var mock = new Mock <IContext>();
mock.SetupGet(x => x.Scope)
.Returns(scope);
mock.As <IVariableScope>()
.SetupGet(x => x.Variables)
.Returns(manager);
context = mock.Object;
}