VsTestWithCakeBuildScript.csx

#tool "nuget:?package=Microsoft.TestPlatform&version=15.7.0"
#tool "nuget:?package=NUnitTestAdapter&version=2.1.1"

var target = Argument("target", "Default");
var configuration = Argument("configuration", "Release");

var buildDir = Directory("./src/Example/bin") + Directory(configuration);
var slnFile = "./src/Example.sln";
var testDllPattern = "./src/**/*Tests.dll";

Task("Clean").Does(() =>
{
    CleanDirectory(buildDir);
});

Task("Restore-NuGet-Packages").IsDependentOn("Clean").Does(() =>
{
    NuGetRestore(slnFile);
});

Task("Build").IsDependentOn("Restore-NuGet-Packages").Does(() =>
{
    MSBuild(slnFile, settings => settings.SetConfiguration(configuration));
});

public string getNUnit2AdapterPath(){
    var nugetPaths = GetDirectories("./tools/NUnitTestAdapter*/tools");
    
    if(nugetPaths.Count == 0){
        throw new Exception("Cannot locate the NUnit2 test adapter. You might need to add '#tool \"nuget:?package=NUnitTestAdapter&version=2.1.1\"' to the top of your build.cake file.");
    }

    return nugetPaths.Last().ToString();
}

Task("Run-Tests").IsDependentOn("Build").Does(() =>
{
    var testSettings = new VSTestSettings{
        ToolPath        = Context.Tools.Resolve("vstest.console.exe"),
        TestAdapterPath = getNUnit2AdapterPath(),

        // use the Trx Logger and a deterministic output file name
        // to be able to import test results into a build orchestration tool (VSTS, Teamcity etc.).
        ArgumentCustomization = arg => arg.Append("/logger:trx;LogFileName=VsTestResults.xml")
    };
    
    VSTest(testDllPattern, testSettings);
});

Task("Default").IsDependentOn("Run-Tests");

RunTarget(target);