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How to use JSCoverage method of PuppeteerSharp.PageCoverage.JSCoverage class

Best Puppeteer-sharp code snippet using PuppeteerSharp.PageCoverage.JSCoverage.JSCoverage

JSCoverageTests.cs

Source:JSCoverageTests.cs

...5using Newtonsoft.Json;6using PuppeteerSharp.PageCoverage;7using Xunit;8using Xunit.Abstractions;9namespace PuppeteerSharp.Tests.JSCoverageTests10{11    [Collection("PuppeteerLoaderFixture collection")]12    public class JSCoverageTests : PuppeteerPageBaseTest13    {14        public JSCoverageTests(ITestOutputHelper output) : base(output)15        {16        }17        [Fact]18        public async Task ShouldWork()19        {20            await Page.Coverage.StartJSCoverageAsync();21            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/simple.html");22            var coverage = await Page.Coverage.StopJSCoverageAsync();23            Assert.Single(coverage);24            Assert.Contains("/jscoverage/simple.html", coverage[0].Url);25            Assert.Equal(new CoverageEntryRange[]26            {27                new CoverageEntryRange28                {29                    Start = 0,30                    End = 1731                },32                new CoverageEntryRange33                {34                    Start = 35,35                    End = 6136                },37            }, coverage[0].Ranges);38        }39        [Fact]40        public async Task ShouldReportSourceUrls()41        {42            await Page.Coverage.StartJSCoverageAsync();43            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/sourceurl.html");44            var coverage = await Page.Coverage.StopJSCoverageAsync();45            Assert.Single(coverage);46            Assert.Equal("nicename.js", coverage[0].Url);47        }48        [Fact]49        public async Task ShouldIgnoreAnonymousScripts()50        {51            await Page.Coverage.StartJSCoverageAsync();52            await Page.GoToAsync(TestConstants.EmptyPage);53            await Page.EvaluateExpressionAsync("console.log(1);");54            var coverage = await Page.Coverage.StopJSCoverageAsync();55            Assert.Empty(coverage);56        }57        [Fact]58        public async Task ShouldReportMultipleScripts()59        {60            await Page.Coverage.StartJSCoverageAsync();61            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/multiple.html");62            var coverage = await Page.Coverage.StopJSCoverageAsync();63            Assert.Equal(2, coverage.Length);64            var orderedList = coverage.OrderBy(c => c.Url);65            Assert.Contains("/jscoverage/script1.js", orderedList.ElementAt(0).Url);66            Assert.Contains("/jscoverage/script2.js", orderedList.ElementAt(1).Url);67        }68        [Fact]69        public async Task ShouldReportRightRanges()70        {71            await Page.Coverage.StartJSCoverageAsync();72            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/ranges.html");73            var coverage = await Page.Coverage.StopJSCoverageAsync();74            Assert.Single(coverage);75            var entry = coverage[0];76            Assert.Single(entry.Ranges);77            var range = entry.Ranges[0];78            Assert.Equal("console.log('used!');", entry.Text.Substring(range.Start, range.End - range.Start));79        }80        [Fact]81        public async Task ShouldReportScriptsThatHaveNoCoverage()82        {83            await Page.Coverage.StartJSCoverageAsync();84            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/unused.html");85            var coverage = await Page.Coverage.StopJSCoverageAsync();86            Assert.Single(coverage);87            var entry = coverage[0];88            Assert.Contains("unused.html", entry.Url);89            Assert.Empty(entry.Ranges);90        }91        [Fact]92        public async Task ShouldWorkWithConditionals()93        {94            const string involved = @"[95              {96                ""Url"": ""http://localhost:<PORT>/jscoverage/involved.html"",97                ""Ranges"": [98                  {99                    ""Start"": 0,100                    ""End"": 35101                  },102                  {103                    ""Start"": 50,104                    ""End"": 100105                  },106                  {107                    ""Start"": 107,108                    ""End"": 141109                  },110                  {111                    ""Start"": 148,112                    ""End"": 160113                  },114                  {115                    ""Start"": 168,116                    ""End"": 207117                  }118                ],119                ""Text"": ""\nfunction foo() {\n  if (1 > 2)\n    console.log(1);\n  if (1 < 2)\n    console.log(2);\n  let x = 1 > 2 ? 'foo' : 'bar';\n  let y = 1 < 2 ? 'foo' : 'bar';\n  let z = () => {};\n  let q = () => {};\n  q();\n}\n\nfoo();\n""120              }121            ]";122            await Page.Coverage.StartJSCoverageAsync();123            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/involved.html");124            var coverage = await Page.Coverage.StopJSCoverageAsync();125            Assert.Equal(126                TestUtils.CompressText(involved),127                Regex.Replace(TestUtils.CompressText(JsonConvert.SerializeObject(coverage)), @"\d{4}\/", "<PORT>/"));128        }129    }130}...

JSCoverage.cs

Source:JSCoverage.cs

...6using PuppeteerSharp.Helpers;7using PuppeteerSharp.Messaging;8namespace PuppeteerSharp.PageCoverage9{10    internal class JSCoverage11    {12        private readonly CDPSession _client;13        private readonly Dictionary<string, string> _scriptURLs;14        private readonly Dictionary<string, string> _scriptSources;15        private readonly ILogger _logger;16        private bool _enabled;17        private bool _resetOnNavigation;18        private bool _reportAnonymousScripts;19        public JSCoverage(CDPSession client)20        {21            _client = client;22            _enabled = false;23            _scriptURLs = new Dictionary<string, string>();24            _scriptSources = new Dictionary<string, string>();25            _logger = _client.Connection.LoggerFactory.CreateLogger<JSCoverage>();26            _resetOnNavigation = false;27        }28        internal Task StartAsync(CoverageStartOptions options)29        {30            if (_enabled)31            {32                throw new InvalidOperationException("JSCoverage is already enabled");33            }34            _resetOnNavigation = options.ResetOnNavigation;35            _reportAnonymousScripts = options.ReportAnonymousScripts;36            _enabled = true;37            _scriptURLs.Clear();38            _scriptSources.Clear();39            _client.MessageReceived += client_MessageReceived;40            return Task.WhenAll(41                _client.SendAsync("Profiler.enable"),42                _client.SendAsync("Profiler.startPreciseCoverage", new { callCount = false, detailed = true }),43                _client.SendAsync("Debugger.enable"),44                _client.SendAsync("Debugger.setSkipAllPauses", new { skip = true })45            );46        }47        internal async Task<CoverageEntry[]> StopAsync()48        {49            if (!_enabled)50            {51                throw new InvalidOperationException("JSCoverage is not enabled");52            }53            _enabled = false;54            var profileResponseTask = _client.SendAsync<ProfilerTakePreciseCoverageResponse>("Profiler.takePreciseCoverage");55            await Task.WhenAll(56               profileResponseTask,57               _client.SendAsync("Profiler.stopPreciseCoverage"),58               _client.SendAsync("Profiler.disable"),59               _client.SendAsync("Debugger.disable")60           ).ConfigureAwait(false);61            _client.MessageReceived -= client_MessageReceived;62            var coverage = new List<CoverageEntry>();63            foreach (var entry in profileResponseTask.Result.Result)64            {65                _scriptURLs.TryGetValue(entry.ScriptId, out var url);...

Coverage.cs

Source:Coverage.cs

...8    /// gathers information about parts of JavaScript and CSS that were used by the page.9    /// </summary>10    public class Coverage11    {12        private readonly JSCoverage _jsCoverage;13        private readonly CSSCoverage _cssCoverage;14        internal Coverage(CDPSession client)15        {16            _jsCoverage = new JSCoverage(client);17            _cssCoverage = new CSSCoverage(client);18        }19        /// <summary>20        /// Starts JS coverage21        /// </summary>22        /// <param name="options">Set of configurable options for coverage</param>23        /// <returns>A task that resolves when coverage is started</returns>24        public Task StartJSCoverageAsync(CoverageStartOptions options = null)25            => _jsCoverage.StartAsync(options ?? new CoverageStartOptions());26        /// <summary>27        /// Stops JS coverage and returns coverage reports for all scripts28        /// </summary>29        /// <returns>Task that resolves to the array of coverage reports for all stylesheets</returns>30        /// <remarks>31        /// JavaScript Coverage doesn't include anonymous scripts by default; however, scripts with sourceURLs are reported.32        /// </remarks>33        public Task<CoverageEntry[]> StopJSCoverageAsync() => _jsCoverage.StopAsync();34        /// <summary>35        /// Starts CSS coverage36        /// </summary>37        /// <param name="options">Set of configurable options for coverage</param>38        /// <returns>A task that resolves when coverage is started</returns>39        public Task StartCSSCoverageAsync(CoverageStartOptions options = null)40            => _cssCoverage.StartAsync(options ?? new CoverageStartOptions());41        /// <summary>42        /// Stops JS coverage and returns coverage reports for all non-anonymous scripts43        /// </summary>44        /// <returns>Task that resolves to the array of coverage reports for all stylesheets</returns>45        /// <remarks>46        /// JavaScript Coverage doesn't include anonymous scripts; however, scripts with sourceURLs are reported.47        /// </remarks>...

JSResetOnNavigationTests.cs

Source:JSResetOnNavigationTests.cs

...4using Newtonsoft.Json;5using PuppeteerSharp.PageCoverage;6using Xunit;7using Xunit.Abstractions;8namespace PuppeteerSharp.Tests.JSCoverageTests9{10    [Collection("PuppeteerLoaderFixture collection")]11    public class JSResetOnNavigationTests : PuppeteerPageBaseTest12    {13        public JSResetOnNavigationTests(ITestOutputHelper output) : base(output)14        {15        }16        [Fact]17        public async Task ShouldReportScriptsAcrossNavigationsWhenDisabled()18        {19            await Page.Coverage.StartJSCoverageAsync(new CoverageStartOptions20            {21                ResetOnNavigation = false22            });23            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/multiple.html");24            await Page.GoToAsync(TestConstants.EmptyPage);25            var coverage = await Page.Coverage.StopJSCoverageAsync();26            Assert.Equal(2, coverage.Length);27        }28        [Fact]29        public async Task ShouldNotReportScriptsAcrossNavigationsWhenEnabled()30        {31            await Page.Coverage.StartJSCoverageAsync();32            await Page.GoToAsync(TestConstants.ServerUrl + "/jscoverage/multiple.html");33            await Page.GoToAsync(TestConstants.EmptyPage);34            var coverage = await Page.Coverage.StopJSCoverageAsync();35            Assert.Empty(coverage);36        }37    }38}...

JSCoverage

Using AI Code Generation

1using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true }))2{3    var page = await browser.NewPageAsync();4    var jsCoverage = await page.Coverage.StartJSCoverageAsync();5    await page.EvaluateFunctionAsync("() => alert('hello')");6    await page.Coverage.StopJSCoverageAsync();7}8using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true }))9{10    var page = await browser.NewPageAsync();11    var cssCoverage = await page.Coverage.StartCSSCoverageAsync();12    await page.EvaluateFunctionAsync("() => alert('hello')");13    await page.Coverage.StopCSSCoverageAsync();14}15using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true }))16{17    var page = await browser.NewPageAsync();18    var cssCoverage = await page.Coverage.StartCSSCoverageAsync();19    await page.EvaluateFunctionAsync("() => alert('hello')");20    await page.Coverage.StopCSSCoverageAsync();21}22using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true }))23{24    var page = await browser.NewPageAsync();25    var jsCoverage = await page.Coverage.StartJSCoverageAsync();26    await page.EvaluateFunctionAsync("() => alert('hello')");27    await page.Coverage.StopJSCoverageAsync();28}29using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true }))30{31    var page = await browser.NewPageAsync();

JSCoverage

Using AI Code Generation

1var page = await browser.NewPageAsync();2var coverage = await page.Coverage.StartJSCoverageAsync();3var jsCoverage = await page.Coverage.StopJSCoverageAsync();4var page = await browser.NewPageAsync();5var coverage = await page.Coverage.StartCSSCoverageAsync();6var cssCoverage = await page.Coverage.StopCSSCoverageAsync();7var page = await browser.NewPageAsync();8var coverage = await page.Coverage.StartJSCoverageAsync();9var jsCoverage = await page.Coverage.StopJSCoverageAsync();10var page = await browser.NewPageAsync();11var coverage = await page.Coverage.StartCSSCoverageAsync();12var cssCoverage = await page.Coverage.StopCSSCoverageAsync();13var page = await browser.NewPageAsync();14var coverage = await page.Coverage.StartJSCoverageAsync();15var jsCoverage = await page.Coverage.StopJSCoverageAsync();16var page = await browser.NewPageAsync();17var coverage = await page.Coverage.StartCSSCoverageAsync();18var cssCoverage = await page.Coverage.StopCSSCoverageAsync();

JSCoverage

Using AI Code Generation

1var page = await browser.NewPageAsync();2var jsCoverage = await page.Coverage.JSCoverage();3await jsCoverage.StartAsync();4var jsCoverageResult = await jsCoverage.StopAsync();5await page.CloseAsync();6var page = await browser.NewPageAsync();7var cssCoverage = await page.Coverage.CSSCoverage();8await cssCoverage.StartAsync();9var cssCoverageResult = await cssCoverage.StopAsync();10await page.CloseAsync();11var page = await browser.NewPageAsync();12await page.Coverage.StartJSCoverageAsync();13var jsCoverageResult = await page.Coverage.StopJSCoverageAsync();14await page.CloseAsync();15var page = await browser.NewPageAsync();16await page.Coverage.StartCSSCoverageAsync();17var cssCoverageResult = await page.Coverage.StopCSSCoverageAsync();18await page.CloseAsync();19var page = await browser.NewPageAsync();20await page.Coverage.StartJSCoverageAsync();21var jsCoverageResult = await page.Coverage.StopJSCoverageAsync();22await page.CloseAsync();23var page = await browser.NewPageAsync();24await page.Coverage.StartCSSCoverageAsync();

JSCoverage

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp;7{8    {9        public static async Task<Dictionary<string, double>> GetCoverage(Page page)10        {11            var coverage = await page.Coverage.GetJSCoverageAsync();12            var result = new Dictionary<string, double>();13            foreach (var entry in coverage)14            {15                var url = entry.Url;16                var functions = entry.Functions;17                foreach (var function in functions)18                {19                    var functionName = function.FunctionName;20                    var range = function.Range;21                    var isBlockCoverage = function.IsBlockCoverage;22                    var ranges = function.Ranges;23                    var count = ranges.Count(a => a.Count > 0);24                    var total = ranges.Count;25                    var percent = (double)count / total;26                    var key = $"{url}::{functionName}";27                    result.Add(key, percent);28                }29            }30            return result;31        }32    }33}34using System;35using System.Collections.Generic;36using System.Linq;37using System.Text;38using System.Threading.Tasks;39using PuppeteerSharp;40{41    {42        public static async Task<Dictionary<string, double>> GetCoverage(Page page)43        {44            var coverage = await page.Coverage.GetJSCoverageAsync();45            var result = new Dictionary<string, double>();46            foreach (var entry in coverage)47            {48                var url = entry.Url;49                var functions = entry.Functions;50                foreach (var function in functions)51                {52                    var functionName = function.FunctionName;53                    var range = function.Range;54                    var isBlockCoverage = function.IsBlockCoverage;55                    var ranges = function.Ranges;56                    var count = ranges.Count(a => a.Count > 0);57                    var total = ranges.Count;58                    var percent = (double)count / total;59                    var key = $"{url}::{functionName}";60                    result.Add(key, percent);61                }62            }63            return result;64        }65    }66}

JSCoverage

Using AI Code Generation

1var jsCoverage = await page.JSCoverage.StartAsync();2var coverage = await jsCoverage.StopAsync();3Console.WriteLine("Coverage: " + coverage);4var cssCoverage = await page.CSSCoverage.StartAsync();5var coverage = await cssCoverage.StopAsync();6Console.WriteLine("Coverage: " + coverage);7var cssCoverage = await page.CSSCoverage.StartAsync();8var coverage = await cssCoverage.StopAsync();9Console.WriteLine("Coverage: " + coverage);10var jsCoverage = await page.JSCoverage.StartAsync();11var coverage = await jsCoverage.StopAsync();12Console.WriteLine("Coverage: " + coverage);13var cssCoverage = await page.CSSCoverage.StartAsync();14var coverage = await cssCoverage.StopAsync();15Console.WriteLine("Coverage: " + coverage);16var jsCoverage = await page.JSCoverage.StartAsync();17var coverage = await jsCoverage.StopAsync();18Console.WriteLine("Coverage: " + coverage);19var cssCoverage = await page.CSSCoverage.StartAsync();20var coverage = await cssCoverage.StopAsync();21Console.WriteLine("Coverage: " + coverage);22var cssCoverage = await page.CSSCoverage.StartAsync();23await page.GoToAsync("https

JSCoverage

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9            var browser = await Puppeteer.LaunchAsync(new LaunchOptions10            {11            });12            var page = await browser.NewPageAsync();13            var coverage = await page.JSCoverage.StartAsync();14            await page.JSCoverage.StopAsync();15            await File.WriteAllTextAsync("coverage.json", JsonConvert.SerializeObject(coverage));16        }17    }18}

JSCoverage

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using System.IO;5using System.Text.Json;6using System.Text.Json.Serialization;7using System.Linq;8using System.Collections.Generic;9{10    {11        public static async Task GenerateCoverageReport(string url, string jsFilePath)12        {13            {14                Args = new string[] { "--no-sandbox" }15            };16            var browser = await Puppeteer.LaunchAsync(options);17            var page = await browser.NewPageAsync();18            await page.GoToAsync(url);19            await page.Coverage.StartJSCoverageAsync();20            await page.GoToAsync(url);21            var coverage = await page.Coverage.StopJSCoverageAsync();22            var jsFileName = Path.GetFileName(jsFilePath);23            var jsFileCoverage = coverage.Where(c => c.Url.Contains(jsFileName)).SingleOrDefault();24            if (jsFileCoverage != null)25            {26                var jsFileContent = File.ReadAllText(jsFilePath);27                var report = GenerateReport(jsFileCoverage, jsFileContent);28                File.WriteAllText("report.json", report);29            }30        }31        public static string GenerateReport(JSCoverageEntry coverage, string jsFileContent)32        {33            var lines = jsFileContent.Split(Environment.NewLine);34            var functions = new List<Function>();35            for (int i = 0; i < lines.Length; i++)36            {37                var line = lines[i];38                {39                };40                functions.Add(function);41            }42            foreach (var range in coverage.Functions)43            {44                var startLine = range.StartOffset;45                var endLine = range.EndOffset;46                for (int i = startLine; i <= endLine; i++)47                {48                    functions[i].Executed = true;49                }50            }51            {52            };53            return JsonSerializer.Serialize(report);54        }55    }56}

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