Add more tests for exactness rr

milli/src/search/new/tests/exactness.rs

@@ -398,6 +398,44 @@ fn create_index_with_varying_proximities() -> TempIndex {
     index
 }
 
+fn create_index_with_typo_and_prefix() -> TempIndex {
+    let index = TempIndex::new();
+
+    index
+        .update_settings(|s| {
+            s.set_primary_key("id".to_owned());
+            s.set_searchable_fields(vec!["text".to_owned()]);
+            s.set_criteria(vec![Criterion::Exactness]);
+        })
+        .unwrap();
+
+    index
+        .add_documents(documents!([
+            {
+                "id": 0,
+                "text": "exPraordinarily quick brown fox",
+            },
+            {
+                "id": 1,
+                "text": "extraordinarily quick brown fox",
+            },
+            {
+                "id": 2,
+                "text": "extra quick brown fox",
+            },
+            {
+                "id": 3,
+                "text": "exPraordinarily quack brown fox",
+            },
+            {
+                "id": 4,
+                "text": "exPraordinaPily quick brown fox",
+            }
+        ]))
+        .unwrap();
+    index
+}
+
 fn create_index_all_equal_except_proximity_between_ignored_terms() -> TempIndex {
     let index = TempIndex::new();
 
@@ -751,3 +789,62 @@ fn test_proximity_after_exactness() {
     ]
     "###);
 }
+
+#[test]
+fn test_exactness_followed_by_typo_prefer_no_typo_prefix() {
+    let index = create_index_with_typo_and_prefix();
+
+    index
+        .update_settings(|s| {
+            s.set_criteria(vec![Criterion::Exactness, Criterion::Words, Criterion::Typo]);
+        })
+        .unwrap();
+
+    let txn = index.read_txn().unwrap();
+
+    let mut s = Search::new(&txn, &index);
+    s.terms_matching_strategy(TermsMatchingStrategy::Last);
+    s.query("quick brown fox extra");
+    let SearchResult { documents_ids, .. } = s.execute().unwrap();
+    insta::assert_snapshot!(format!("{documents_ids:?}"), @"[2, 1, 0, 4, 3]");
+    let texts = collect_field_values(&index, &txn, "text", &documents_ids);
+
+    insta::assert_debug_snapshot!(texts, @r###"
+    [
+        "\"extra quick brown fox\"",
+        "\"extraordinarily quick brown fox\"",
+        "\"exPraordinarily quick brown fox\"",
+        "\"exPraordinaPily quick brown fox\"",
+        "\"exPraordinarily quack brown fox\"",
+    ]
+    "###);
+}
+
+#[test]
+fn test_typo_followed_by_exactness() {
+    let index = create_index_with_typo_and_prefix();
+
+    index
+        .update_settings(|s| {
+            s.set_criteria(vec![Criterion::Words, Criterion::Typo, Criterion::Exactness]);
+        })
+        .unwrap();
+
+    let txn = index.read_txn().unwrap();
+
+    let mut s = Search::new(&txn, &index);
+    s.terms_matching_strategy(TermsMatchingStrategy::Last);
+    s.query("extraordinarily quick brown fox");
+    let SearchResult { documents_ids, .. } = s.execute().unwrap();
+    insta::assert_snapshot!(format!("{documents_ids:?}"), @"[1, 0, 4, 3]");
+    let texts = collect_field_values(&index, &txn, "text", &documents_ids);
+
+    insta::assert_debug_snapshot!(texts, @r###"
+    [
+        "\"extraordinarily quick brown fox\"",
+        "\"exPraordinarily quick brown fox\"",
+        "\"exPraordinaPily quick brown fox\"",
+        "\"exPraordinarily quack brown fox\"",
+    ]
+    "###);
+}