Move crates under a sub folder to clean up the code

crates/milli/tests/search/facet_distribution.rs

@@ -0,0 +1,74 @@
+use std::io::Cursor;
+
+use big_s::S;
+use heed::EnvOpenOptions;
+use maplit::hashset;
+use milli::documents::{DocumentsBatchBuilder, DocumentsBatchReader};
+use milli::update::{IndexDocuments, IndexDocumentsConfig, IndexerConfig, Settings};
+use milli::{FacetDistribution, Index, Object, OrderBy};
+use serde_json::Deserializer;
+
+#[test]
+fn test_facet_distribution_with_no_facet_values() {
+    let path = tempfile::tempdir().unwrap();
+    let mut options = EnvOpenOptions::new();
+    options.map_size(10 * 1024 * 1024); // 10 MB
+    let index = Index::new(options, &path).unwrap();
+
+    let mut wtxn = index.write_txn().unwrap();
+    let config = IndexerConfig::default();
+    let mut builder = Settings::new(&mut wtxn, &index, &config);
+
+    builder.set_filterable_fields(hashset! {
+        S("genres"),
+        S("tags"),
+    });
+    builder.execute(|_| (), || false).unwrap();
+
+    // index documents
+    let config = IndexerConfig { max_memory: Some(10 * 1024 * 1024), ..Default::default() };
+    let indexing_config = IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
+
+    let builder =
+        IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| (), || false).unwrap();
+    let mut documents_builder = DocumentsBatchBuilder::new(Vec::new());
+    let reader = Cursor::new(
+        r#"{
+            "id": 123,
+            "title": "What a week, hu...",
+            "genres": [],
+            "tags": ["blue"]
+        }
+        {
+            "id": 345,
+            "title": "I am the pig!",
+            "tags": ["red"]
+        }"#,
+    );
+
+    for result in Deserializer::from_reader(reader).into_iter::<Object>() {
+        let object = result.unwrap();
+        documents_builder.append_json_object(&object).unwrap();
+    }
+
+    let vector = documents_builder.into_inner().unwrap();
+
+    // index documents
+    let content = DocumentsBatchReader::from_reader(Cursor::new(vector)).unwrap();
+    let (builder, user_error) = builder.add_documents(content).unwrap();
+    user_error.unwrap();
+    builder.execute().unwrap();
+
+    wtxn.commit().unwrap();
+
+    let txn = index.read_txn().unwrap();
+    let mut distrib = FacetDistribution::new(&txn, &index);
+    distrib.facets(vec![("genres", OrderBy::default())]);
+    let result = distrib.execute().unwrap();
+    assert_eq!(result["genres"].len(), 0);
+
+    let mut distrib = FacetDistribution::new(&txn, &index);
+    distrib.facets(vec![("tags", OrderBy::default())]);
+    let result = distrib.execute().unwrap();
+    assert_eq!(result["tags"].len(), 2);
+}