feat(clearsearchonblur): add clearSearchOnBlur prop (#1077)

Add docs, update tests from #1060.

docs/api/props.md

@@ -120,6 +120,19 @@ clearSearchOnSelect: {
 },
 ```
 
+## clearSearchOnBlur
+
+Enables/disables clearing the search text when the search input is blurred.
+
+```js
+clearSearchOnBlur: {
+    type: Function,
+    default: function ({ clearSearchOnSelect, multiple }) {
+      return clearSearchOnSelect && !multiple
+    }
+},
+```
+
 ## closeOnSelect
 
 Close a dropdown when an option is chosen. Set to false to keep the dropdown

tests/unit/ReactiveOptions.spec.js

@@ -112,28 +112,28 @@ describe("Reset on options change", () => {
     expect(Select.vm.selectedValue).toEqual([{ label: "oneLabel", value: "one" }]);
   });
 
-  it('default behavior when blur search field is to clean it.', () => {
+  it('clearSearchOnBlur returns false when multiple is true', () => {
     const Select = mountDefault({});
     let clearSearchOnBlur = jest.spyOn(Select.vm, 'clearSearchOnBlur');
-    Select.find({ ref: "search" }).trigger("click");
-    Select.setData({ search: "one" });
-    Select.find({ ref: "search" }).trigger("blur");
+    Select.find({ref: 'search'}).trigger('click');
+    Select.setData({search: 'one'});
+    Select.find({ref: 'search'}).trigger('blur');
 
     expect(clearSearchOnBlur).toHaveBeenCalledTimes(1);
     expect(clearSearchOnBlur).toHaveBeenCalledWith({
       clearSearchOnSelect: true,
-      multiple: false
+      multiple: false,
     });
     expect(Select.vm.search).toBe('');
   });
 
-  it('control behavior when blur search field.', () => {
+  it('clearSearchOnBlur accepts a function', () => {
     let clearSearchOnBlur = jest.fn(() => false);
     const Select = mountDefault({clearSearchOnBlur});
 
-    Select.find({ ref: "search" }).trigger("click");
-    Select.setData({ search: "one" });
-    Select.find({ ref: "search" }).trigger("blur");
+    Select.find({ref: 'search'}).trigger('click');
+    Select.setData({search: 'one'});
+    Select.find({ref: 'search'}).trigger('blur');
 
     expect(clearSearchOnBlur).toHaveBeenCalledTimes(1);
     expect(Select.vm.search).toBe('one');