fix(select): does not collapse on [multiple="false"]

Closes #22

Author: Kamil Kisiela

src/types/select/select.js

@@ -1,4 +1,5 @@
 import template from './select.html';
+import { ngModelAttrsManipulator } from './../../helpers';
 
 export default (formlyConfigProvider) => {
   formlyConfigProvider.setType({
@@ -13,9 +14,6 @@ export default (formlyConfigProvider) => {
         disabled: {
           bound: 'ng-disabled'
         },
-        multiple: {
-          bound: 'multiple'
-        },
         onClose: {
           bound: 'md-on-close'
         },
@@ -36,4 +34,11 @@ export default (formlyConfigProvider) => {
       }
     })
   });
+
+  formlyConfigProvider.templateManipulators.preWrapper.push((tpl, options) => {
+    const to = options.templateOptions || {};
+    // adds multiple only when:
+    // templateOptions.multiple equals true
+    return to.multiple === true ? ngModelAttrsManipulator(tpl, options, 'multiple') : tpl;
+  });
 };

tests/types/select-spec.js

@@ -101,6 +101,15 @@ describe('formlyMaterial - select type', () => {
     expect(element.attr('multiple')).toBeDefined();
   });
 
+  it('should not add multiple directive when does not equal true', () => {
+    compile({
+      templateOptions: {
+        multiple: false
+      }
+    });
+    expect(element.attr('multiple')).toBeUndefined();
+  });
+
   it('should be able to bind md-on-close', () => {
     compile();
     expect(element.attr('md-on-close')).toBe(`options.templateOptions['onClose']`);