fix(tree-base.js): Stop event propagation on click of the row header.

fix #4241

src/features/tree-base/js/tree-base.js

@@ -1580,6 +1580,7 @@
       link: function($scope, $elm, $attrs, uiGridCtrl) {
         var self = uiGridCtrl.grid;
         $scope.treeButtonClick = function(row, evt) {
+          evt.stopPropagation();
           uiGridTreeBaseService.toggleRowTreeState(self, row, evt);
         };
       }

src/features/tree-base/test/ui-grid-tree-base-row-header-buttons.directive.spec.js

@@ -0,0 +1,61 @@
+describe('ui.grid.treeBase uiGridTreeBaseRowHeaderButtons', function () {
+	var $compile, $templateCache, $rootScope, $scope, uiGridTreeBaseService,
+		uiGridTreeBaseRowHeaderButtons;
+
+	function compileTreeBaseRowHeaderButton(elem) {
+		uiGridTreeBaseRowHeaderButtons = angular.element(elem);
+		$compile(uiGridTreeBaseRowHeaderButtons)($scope);
+		$scope.$apply();
+	}
+
+	beforeEach(function() {
+		module('ui.grid');
+		module('ui.grid.treeBase');
+		module('ui.grid.treeView');
+
+		inject(function(_$compile_, _$rootScope_, _$templateCache_, _uiGridTreeBaseService_) {
+			$compile = _$compile_;
+			$rootScope = _$rootScope_;
+			$templateCache = _$templateCache_;
+			uiGridTreeBaseService = _uiGridTreeBaseService_;
+		});
+
+		$scope = $rootScope.$new();
+		$scope.gridOptions = {
+			showHeader: false,
+			data: [
+				{name: 'Dynamic 1', gender: 'female', age: 53, company: 'Griddable grids', balance: 38000, $$treeLevel: 0}
+			]
+		};
+
+		compileTreeBaseRowHeaderButton('<div ui-grid="gridOptions" ui-grid-tree-view></div>');
+	});
+	afterEach(function() {
+		uiGridTreeBaseRowHeaderButtons = null;
+	});
+	it('should compile the menu item', function() {
+		expect(uiGridTreeBaseRowHeaderButtons.find('.ui-grid-tree-base-row-header-buttons').length).toBe(1);
+	});
+	describe('on tree button click', function() {
+		var event;
+
+		beforeEach(function() {
+			event = $.Event('click');
+
+			spyOn(event, 'stopPropagation').and.callThrough();
+			spyOn(uiGridTreeBaseService, 'toggleRowTreeState').and.callFake(angular.noop);
+
+			uiGridTreeBaseRowHeaderButtons.find('.ui-grid-tree-base-row-header-buttons').trigger(event);
+		});
+		afterEach(function() {
+			event.stopPropagation.calls.reset();
+			uiGridTreeBaseService.toggleRowTreeState.calls.reset();
+		});
+		it('should stop event propagation', function() {
+			expect(event.stopPropagation).toHaveBeenCalled();
+		});
+		it('should toggle the row tree state', function() {
+			expect(uiGridTreeBaseService.toggleRowTreeState).toHaveBeenCalled();
+		});
+	});
+});