libdom/src/test/dom/is-view.js

Lean Browser Library for typical DOM operations

'use strict';


describe(`Inspect Mixed [defaultView] if it is a "Window" Object using 
         isView(defaultView:Mixed) method`,
    () => {
        var isView = global.libdom.isView;
        
        it(`1. Should accept any [defaultView] parameter and returns true
           if it is an instance of a "Window" Object.`,
           () => {
                expect(() => isView(global)).not.toThrow();
                expect(isView(global)).toBe(true);
            
                expect(() => isView(global.window)).not.toThrow();
                expect(isView(global.window)).toBe(true);
            
           });
        
        it(`2. Should accept any [defaultView] parameter and returns false 
           if it is not an instance of a "Window" Object.`,
           () => {
                
                expect(() => isView(null)).not.toThrow();
                expect(isView(null)).toBe(false);
                
                expect(() => isView(/test/)).not.toThrow();
                expect(isView(/test/)).toBe(false);
                
                expect(() => isView(new Date())).not.toThrow();
                expect(isView(new Date())).toBe(false);
                
                expect(() => isView(1)).not.toThrow();
                expect(isView(1)).toBe(false);
                
                expect(() => isView(undefined)).not.toThrow();
                expect(isView(undefined)).toBe(false);
            
           });
        
    });