[Enterprise Search] Do not include precision in the search request when precision tuning is not enabled for an Engine

x-pack/plugins/enterprise_search/public/applications/app_search/components/relevance_tuning/relevance_tuning_logic.test.ts

@@ -365,9 +365,11 @@ describe('RelevanceTuningLogic', () => {
               weight: 1,
             },
           },
+          precision: 7,
+          precision_enabled: true,
         };
 
-        const searchSettingsWithoutNewBoostProp = {
+        const { ['precision_enabled']: precisionEnabled, ...searchSettingsWithoutNewBoostProp } = {
           ...searchSettingsWithNewBoostProp,
           boosts: {
             foo: [
@@ -378,6 +380,7 @@ describe('RelevanceTuningLogic', () => {
               },
             ],
           },
+          precision: 7,
         };
 
         mount({
@@ -413,6 +416,38 @@ describe('RelevanceTuningLogic', () => {
           searchSettings: {
             searchField: {},
             boosts: {},
+            precision: 7,
+            precision_enabled: true,
+          },
+        });
+        jest.spyOn(RelevanceTuningLogic.actions, 'setSearchResults');
+        http.post.mockReturnValueOnce(
+          Promise.resolve({
+            results: searchResults,
+          })
+        );
+
+        RelevanceTuningLogic.actions.getSearchResults();
+
+        jest.runAllTimers();
+        await nextTick();
+
+        expect(http.post).toHaveBeenCalledWith('/internal/app_search/engines/test-engine/search', {
+          body: JSON.stringify({ precision: 7 }),
+          query: {
+            query: 'foo',
+          },
+        });
+      });
+
+      it("won't send precision on the API call if it is not enabled", async () => {
+        mount({
+          query: 'foo',
+          searchSettings: {
+            searchField: {},
+            boosts: {},
+            precision: 7,
+            precision_enabled: false,
           },
         });
         jest.spyOn(RelevanceTuningLogic.actions, 'setSearchResults');

x-pack/plugins/enterprise_search/public/applications/app_search/components/relevance_tuning/relevance_tuning_logic.ts

@@ -294,6 +294,7 @@ export const RelevanceTuningLogic = kea<
       actions.setResultsLoading(true);
 
       const filteredBoosts = removeEmptyValueBoosts(boosts);
+      const precisionSettings = values.isPrecisionTuningEnabled ? { precision } : {};
 
       try {
         const response = await http.post<{ results: SearchResult[] }>(url, {
@@ -303,7 +304,7 @@ export const RelevanceTuningLogic = kea<
           body: JSON.stringify({
             boosts: isEmpty(filteredBoosts) ? undefined : filteredBoosts,
             search_fields: isEmpty(searchFields) ? undefined : searchFields,
-            precision,
+            ...precisionSettings,
           }),
         });