add isMobile service and tests

test/unit/controllers/controllersSpec.js

@@ -214,4 +214,18 @@ describe("Unit: Controllers", function() {
 
   });
 
+  describe('Send Controller', function() {
+    var sendCtrl;
+    beforeEach(inject(function($controller, $rootScope) {
+      scope = $rootScope.$new();
+      sendCtrl = $controller('SendController', {
+        $scope: scope,
+      });
+    }));
+
+    it('should have a SendController', function() {
+      expect(scope.isMobile).not.to.equal(null);
+    });
+  });
+
 });

test/unit/services/servicesSpec.js

@@ -108,3 +108,19 @@ describe("Unit: Backup Service", function() {
     expectation.once();
   }));
 });
+
+describe("Unit: isMobile Service", function() {
+  beforeEach(angular.mock.module('copayApp.services'));
+  it('should contain a isMobile service', inject(function(isMobile) {
+    expect(isMobile).not.to.equal(null);
+  }));
+  it('should not detect mobile by default', inject(function(isMobile) {
+    isMobile.any().should.equal(false);
+  }));
+  it('should detect mobile if user agent is Android', inject(function(isMobile) {
+    navigator.__defineGetter__('userAgent', function(){
+      return 'Android 2.2.3';
+    });
+    isMobile.any().should.equal(true);
+  }));
+});