Fixed failing JS specs

app/assets/javascripts/filtered_search/dropdown_utils.js.es6

@@ -76,7 +76,6 @@
     }
     static getSearchInput(filteredSearchInput) {
-      const selectionStart = filteredSearchInput.selectionStart;
       const inputValue = filteredSearchInput.value;
       const { right } = gl.DropdownUtils.getInputSelectionPosition(filteredSearchInput);
@@ -88,7 +87,7 @@
       let inputValue = input.value;
       // Replace all spaces inside quote marks with underscores
       // This helps with matching the beginning & end of a token:key
-      inputValue = inputValue.replace(/"(.*?)"/g, str => str.replace(/\s/g, '_') );
+      inputValue = inputValue.replace(/"(.*?)"/g, str => str.replace(/\s/g, '_'));
       // Get the right position for the word selected
       // Regex matches first space

app/assets/javascripts/filtered_search/filtered_search_dropdown_manager.js.es6

@@ -73,7 +73,6 @@
       // Sometimes can end up at end of input
       input.setSelectionRange(selectionStart, selectionStart);
-      const inputValue = input.value;
       const { right } = gl.DropdownUtils.getInputSelectionPosition(input);
       input.setSelectionRange(right, right);

spec/javascripts/filtered_search/dropdown_utils_spec.js.es6

@@ -67,20 +67,32 @@
     });
     describe('filterHint', () => {
+      let input;
+
+      beforeEach(() => {
+        setFixtures(`
+          <input type="text" id="test" />
+        `);
+
+        input = document.getElementById('test');
+      });
+
       it('should filter', () => {
-        let updatedItem = gl.DropdownUtils.filterHint({
+        input.value = 'l';
+        let updatedItem = gl.DropdownUtils.filterHint(input, {
           hint: 'label',
-        }, 'l');
+        });
         expect(updatedItem.droplab_hidden).toBe(false);
-        updatedItem = gl.DropdownUtils.filterHint({
+        input.value = 'o';
+        updatedItem = gl.DropdownUtils.filterHint(input, {
           hint: 'label',
         }, 'o');
         expect(updatedItem.droplab_hidden).toBe(true);
       });
       it('should return droplab_hidden false when item has no hint', () => {
-        const updatedItem = gl.DropdownUtils.filterHint({}, '');
+        const updatedItem = gl.DropdownUtils.filterHint(input, {}, '');
         expect(updatedItem.droplab_hidden).toBe(false);
       });
     });