public void QueryExprParse()
{
var result = _parser.DataQueryParse(@"Tasks
order #a# asc,#b# desc,#c# asc
group #aa#,#bb#,#cc#
select
alpha = #beta#
#gamma#
theta = #eta.sigma.pi#
#x.y.z#
select end
skip 1
take 2
table Id");
result.Should().NotBeNull();
result.Blocks.Should().NotBeNull();
var order = result.Blocks.First() as DslOrderBlock;
order.Should().NotBeNull();
order.Should().NotBeNull();
order.Items.Should().HaveCount(3);
order.Items[0].OrderFieldName.Should().Be("a");
order.Items[0].SortOrder.Should().Be(SortOrder.Ascending);
order.Items[1].OrderFieldName.Should().Be("b");
order.Items[1].SortOrder.Should().Be(SortOrder.Descending);
order.Items[2].OrderFieldName.Should().Be("c");
order.Items[2].SortOrder.Should().Be(SortOrder.Ascending);
var groupBlock = result.Blocks.Skip(1).First() as DslGroupBlock;
groupBlock.Should().NotBeNull();
groupBlock.Items.Should().NotBeNullOrEmpty();
groupBlock.Items.Select(_ => _.VariableName).Should().BeEquivalentTo("aa", "bb", "cc");
var select = result.Blocks.Skip(2).First() as DslFormatBlock;
select.Should().NotBeNull();
select.Should().NotBeNull();
select.Selects.Should().NotBeNullOrEmpty();
select.Selects.Should().HaveCount(4);
var first = select.Selects.First();
first.Name.Should().Be("alpha");
first.Value.Should().Be("#beta#");
var second = select.Selects.Skip(1).First();
second.Name.Should().BeNull();
second.Value.Should().Be("#gamma#");
var third = select.Selects.Skip(2).First();
third.Name.Should().Be("theta");
third.Value.Should().Be("#eta.sigma.pi#");
var fourth = select.Selects.Skip(3).First();
fourth.Name.Should().BeNull();
fourth.Value.Should().Be("#x.y.z#");
var skipLimit = result.Blocks.Skip(3).First() as DslLimitBlock;
skipLimit.Should().NotBeNull();
skipLimit.Skip.ShouldBeEquivalentTo(1);
var takeLimit = result.Blocks.Skip(4).First() as DslLimitBlock;
takeLimit.Should().NotBeNull();
takeLimit.Take.ShouldBeEquivalentTo(2);
result.TableKey.Should().Be("Id");
}