跟踪 Protractor 测试执行所消耗的浏览器内存的最有效方法是什么？

Question

想法是：

1. 在开始测试之前测量 usedJSHeapSize。
2. 完成测试后测量usedJSHeapSize。
3. 比较 1 和 2 的值，如果大小增加超过定义的阈值，则场景失败。

到目前为止我已经尝试过：

• SG 量角器工具（https://github.com/SunGard-Labs/sg-protractor-tools) which allow to repeat the same scenario several times and find the memory growth. I have discarded it since it does not allow checking memory usage for a single scenario (https://github.com/SunGard-Labs/sg-protractor-tools/issues/3）。
• 从浏览器对象中提取内存值，这似乎无法（或者我无法开始工作）与规范集成 -> Assign a value returned from a promise to a global variable

还有其他想法吗？

Answer 1

这可以通过调用 browser.executeScript()

来完成

对Chrome使用window.performance.memory获取性能参数 下面的代码对我很有用。

https://docs.webplatform.org/wiki/apis/timing/properties/memory

it('Dummy Test', function(){
    //Fetch the browser memory parameters before execution
    browser.executeScript('return window.performance.memory').then(function(memoryInfo){
        console.log(memoryInfo)
        var beforejsHeapSizeLimit = memoryInfo.jsHeapSizeLimit;
        var beforeusedJSHeapSize = memoryInfo.usedJSHeapSize;
        var beforetotalJSHeapSize = memoryInfo.totalJSHeapSize;

        // Have all your code to open browser .. navigate pages etc
        browser.driver.get("https://wordpress.com/");
        browser.driver.get("http://www.adobe.com/software/flash/about/");
        // Once you are done compare before and after values

        //Fetch the browser memory parameters after execution and compare
        browser.executeScript('return window.performance.memory').then(function(aftermemoryInfo) {
            console.log(aftermemoryInfo)
            var afterjsHeapSizeLimit = aftermemoryInfo.jsHeapSizeLimit;
            var afterusedJSHeapSize = aftermemoryInfo.usedJSHeapSize;
            var aftertotalJSHeapSize = aftermemoryInfo.totalJSHeapSize;
            expect((parseInt(afterusedJSHeapSize)-parseInt(beforeusedJSHeapSize))<10000000).toBe.true;
        });
    });

});