test: move importer tests to tests/ (via DocumentParser)

crates/adapters/importer/src/mapper.rs

@@ -79,7 +79,3 @@ fn set_field(row: &mut ImportRow, field: &DomainField, value: String) {
         DomainField::ExternalMetadataId => row.external_metadata_id = Some(value),
     }
 }
-
-#[cfg(test)]
-#[path = "tests/mapper.rs"]
-mod tests;

crates/adapters/importer/src/parsers/mod.rs

@@ -7,7 +7,3 @@ pub use csv::parse_csv;
 pub use json::parse_json;
 #[cfg(feature = "xlsx")]
 pub use xlsx::parse_xlsx;
-
-#[cfg(test)]
-#[path = "tests.rs"]
-mod tests;