v4 improve coverage (#25945)

* Improve code coverage for our Button plugin

* improve coverage for our Alert plugin

* test tooltip update method

* test update and dispose for dropdown

* increase code coverage requirements

1 files changed, 23 insertions, 0 deletions

diff --git a/js/tests/unit/button.js b/js/tests/unit/button.js
index cc2719c3a..1fdcce95f 100644
--- a/js/tests/unit/button.js
+++ b/js/tests/unit/button.js
@@ -172,4 +172,27 @@ $(function () {
     assert.ok($btn.is(':not(.active)'), 'button did not become active')
     assert.ok(!$input.is(':checked'), 'checkbox did not get checked')
   })
+
+  QUnit.test('dispose should remove data and the element', function (assert) {
+    assert.expect(2)
+
+    var $el = $('<div/>')
+    var $button = $el.bootstrapButton()
+
+    assert.ok(typeof $button.data('bs.button') !== 'undefined')
+
+    $button.data('bs.button').dispose()
+
+    assert.ok(typeof $button.data('bs.button') === 'undefined')
+  })
+
+  QUnit.test('should return button version', function (assert) {
+    assert.expect(1)
+
+    if (typeof Button !== 'undefined') {
+      assert.ok(typeof Button.VERSION === 'string')
+    } else {
+      assert.notOk()
+    }
+  })
 })