Add tests about experimentalness of the feature and fix existing

crates/meilisearch/tests/dumps/mod.rs

@@ -2132,7 +2132,8 @@ async fn import_dump_v6_containing_experimental_features() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 
@@ -2254,7 +2255,8 @@ async fn import_dump_v6_containing_batches_and_enqueued_tasks() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 
@@ -2358,7 +2360,8 @@ async fn generate_and_import_dump_containing_vectors() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 

crates/meilisearch/tests/features/mod.rs

@@ -23,7 +23,8 @@ async fn experimental_features() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 
@@ -37,7 +38,8 @@ async fn experimental_features() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 
@@ -51,7 +53,8 @@ async fn experimental_features() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 
@@ -66,7 +69,8 @@ async fn experimental_features() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 
@@ -81,7 +85,8 @@ async fn experimental_features() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 }
@@ -103,7 +108,8 @@ async fn experimental_feature_metrics() {
       "editDocumentsByFunction": false,
       "containsFilter": false,
       "network": false,
-      "getTaskDocumentsRoute": false
+      "getTaskDocumentsRoute": false,
+      "compositeEmbedders": false
     }
     "###);
 
@@ -158,7 +164,7 @@ async fn errors() {
     meili_snap::snapshot!(code, @"400 Bad Request");
     meili_snap::snapshot!(meili_snap::json_string!(response), @r###"
     {
-      "message": "Unknown field `NotAFeature`: expected one of `metrics`, `logsRoute`, `editDocumentsByFunction`, `containsFilter`, `network`, `getTaskDocumentsRoute`",
+      "message": "Unknown field `NotAFeature`: expected one of `metrics`, `logsRoute`, `editDocumentsByFunction`, `containsFilter`, `network`, `getTaskDocumentsRoute`, `compositeEmbedders`",
       "code": "bad_request",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#bad_request"

crates/meilisearch/tests/vector/settings.rs

@@ -412,6 +412,117 @@ async fn ollama_url_checks() {
 async fn composite_checks() {
     let server = Server::new().await;
     let index = server.index("test");
+    // feature not enabled, using source
+    let (response, _code) = index
+        .update_settings(json!({
+          "embedders": {
+            "test": null
+          }
+        }))
+        .await;
+    server.wait_task(response.uid()).await;
+
+    let (response, code) = index
+        .update_settings(json!({
+          "embedders": {
+            "test": {
+              "source": "composite",
+              "searchEmbedder": {
+                "source": "huggingFace",
+                "model": "sentence-transformers/all-MiniLM-L6-v2",
+                "revision": "e4ce9877abf3edfe10b0d82785e83bdcb973e22e",
+              },
+              "indexingEmbedder": {
+                "source": "huggingFace",
+                "model": "sentence-transformers/all-MiniLM-L6-v2",
+                "revision": "e4ce9877abf3edfe10b0d82785e83bdcb973e22e",
+              },
+           }
+          }
+        }))
+        .await;
+    snapshot!(code, @"400 Bad Request");
+    snapshot!(response, @r###"
+    {
+      "message": "using `\"composite\"` as source requires enabling the `composite embedders` experimental feature. See https://github.com/orgs/meilisearch/discussions/816",
+      "code": "feature_not_enabled",
+      "type": "invalid_request",
+      "link": "https://docs.meilisearch.com/errors#feature_not_enabled"
+    }
+    "###);
+
+    // feature not enabled, using search embedder
+    let (response, _code) = index
+        .update_settings(json!({
+          "embedders": {
+            "test": null
+          }
+        }))
+        .await;
+    server.wait_task(response.uid()).await;
+
+    let (response, code) = index
+        .update_settings(json!({
+          "embedders": {
+            "test": {
+              "source": "userProvided",
+              "searchEmbedder": {
+                "source": "huggingFace",
+                "model": "sentence-transformers/all-MiniLM-L6-v2",
+                "revision": "e4ce9877abf3edfe10b0d82785e83bdcb973e22e",
+              }
+           }
+          }
+        }))
+        .await;
+    snapshot!(code, @"400 Bad Request");
+    snapshot!(response, @r###"
+    {
+      "message": "setting `searchEmbedder` requires enabling the `composite embedders` experimental feature. See https://github.com/orgs/meilisearch/discussions/816",
+      "code": "feature_not_enabled",
+      "type": "invalid_request",
+      "link": "https://docs.meilisearch.com/errors#feature_not_enabled"
+    }
+    "###);
+
+    // feature not enabled, using indexing embedder
+    let (response, _code) = index
+        .update_settings(json!({
+          "embedders": {
+            "test": null
+          }
+        }))
+        .await;
+    server.wait_task(response.uid()).await;
+
+    let (response, code) = index
+        .update_settings(json!({
+          "embedders": {
+            "test": {
+              "source": "userProvided",
+              "indexingEmbedder": {
+                "source": "huggingFace",
+                "model": "sentence-transformers/all-MiniLM-L6-v2",
+                "revision": "e4ce9877abf3edfe10b0d82785e83bdcb973e22e",
+              }
+           }
+          }
+        }))
+        .await;
+    snapshot!(code, @"400 Bad Request");
+    snapshot!(response, @r###"
+    {
+      "message": "setting `indexingEmbedder` requires enabling the `composite embedders` experimental feature. See https://github.com/orgs/meilisearch/discussions/816",
+      "code": "feature_not_enabled",
+      "type": "invalid_request",
+      "link": "https://docs.meilisearch.com/errors#feature_not_enabled"
+    }
+    "###);
+
+    // enable feature
+    let (_, code) = server.set_features(json!({"compositeEmbedders": true})).await;
+    snapshot!(code, @"200 OK");
+
     // inner distribution
     let (response, _code) = index
         .update_settings(json!({