fix bootstrap-button toggle regression + tests

docs/assets/js/bootstrap-button.js

@@ -91,7 +91,9 @@
 
   $(function () {
     $('body').on('click.button.data-api', '[data-toggle^=button]', function ( e ) {
-      $(e.currentTarget).button('toggle')
+      var $btn = $(e.target)
+      if (!$btn.hasClass('btn')) $btn = $btn.closest('.btn')
+      $btn.button('toggle')
     })
   })
 

js/bootstrap-button.js

@@ -91,7 +91,9 @@
 
   $(function () {
     $('body').on('click.button.data-api', '[data-toggle^=button]', function ( e ) {
-      $(e.currentTarget).button('toggle')
+      var $btn = $(e.target)
+      if (!$btn.hasClass('btn')) $btn = $btn.closest('.btn')
+      $btn.button('toggle')
     })
   })
 

js/tests/unit/bootstrap-button.js

@@ -45,10 +45,33 @@ $(function () {
       })
 
       test("should toggle active", function () {
-        var btn = $('<button class="btn" data-loading-text="fat">mdo</button>')
+        var btn = $('<button class="btn">mdo</button>')
         ok(!btn.hasClass('active'), 'btn does not have active class')
         btn.button('toggle')
         ok(btn.hasClass('active'), 'btn has class active')
       })
 
+      test("should toggle active when btn children are clicked", function () {
+        var btn = $('<button class="btn" data-toggle="button">mdo</button>')
+          , inner = $('<i></i>')
+        btn
+          .append(inner)
+          .appendTo($('#qunit-fixture'))
+        ok(!btn.hasClass('active'), 'btn does not have active class')
+        inner.click()
+        ok(btn.hasClass('active'), 'btn has class active')
+      })
+
+     test("should toggle active when btn children are clicked within btn-group", function () {
+        var btngroup = $('<div class="btn-group" data-toggle="buttons-checkbox"></div>')
+          , btn = $('<button class="btn">fat</button>')
+          , inner = $('<i></i>')
+        btngroup
+          .append(btn.append(inner))
+          .appendTo($('#qunit-fixture'))
+        ok(!btn.hasClass('active'), 'btn does not have active class')
+        inner.click()
+        ok(btn.hasClass('active'), 'btn has class active')
+      })
+
 })
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