Moved multi-field query tests to lib.

src/document.rs

@@ -8,7 +8,7 @@ mod session;
 use record::{InternalRecord, InternalRecords, Oid};
 
 pub use clock::Clock;
-pub use create::CreateDoc;
+pub use create::{CreateDoc, IndexType};
 pub use definition::DocDef;
 pub use field::{Field, FieldType};
 pub use record::{Record, Records};