public IEnumerable<KeyValuePair<string, bool?>> ExecuteAllTests(ExecutionEnvironment environment, IPackage package)
{
var descriptor = new PackageDescriptor();
descriptor.Dependencies.Add(new PackageDependencyBuilder(Guid.NewGuid().ToString()).Name(package.Name).VersionVertex(new EqualVersionVertex(package.Version)));
var allAssemblyReferences = _manager.GetProjectAssemblyReferences(descriptor, package.Source, environment, false);
var runners = _factories.SelectMany(x => x.GetTestRunners(allAssemblyReferences)).NotNull();
var tests = new DefaultAssemblyExporter("tests").Items<Exports.IAssembly>(package, environment);
if (tests == null) return Enumerable.Empty<KeyValuePair<string, bool?>>();
var testAssemblies = from item in tests.SelectMany(x=>x)
where item.File.Extension.Equals(".dll")
select item.File.Path.FullPath;
return from runner in runners
from asm in testAssemblies
from result in runner.ExecuteTests(allAssemblyReferences.Select(x => x.File.Path.FullPath).ToList(), testAssemblies)
select result;
}