func TestStdlib(t *testing.T) {
runtime.GC()
t0 := time.Now()
var memstats runtime.MemStats
runtime.ReadMemStats(&memstats)
alloc := memstats.Alloc
// Load, parse and type-check the program.
var conf loader.Config
for _, path := range allPackages() {
if err := conf.ImportWithTests(path); err != nil {
t.Error(err)
}
}
prog, err := conf.Load()
if err != nil {
t.Fatalf("Load failed: %v", err)
}
t1 := time.Now()
runtime.GC()
runtime.ReadMemStats(&memstats)
numPkgs := len(prog.AllPackages)
if want := 205; numPkgs < want {
t.Errorf("Loaded only %d packages, want at least %d", numPkgs, want)
}
// Dump package members.
if false {
for pkg := range prog.AllPackages {
fmt.Printf("Package %s:\n", pkg.Path())
scope := pkg.Scope()
for _, name := range scope.Names() {
if ast.IsExported(name) {
fmt.Printf("\t%s\n", types.ObjectString(pkg, scope.Lookup(name)))
}
}
fmt.Println()
}
}
// Check that Test functions for io/ioutil, regexp and
// compress/bzip2 are all simultaneously present.
// (The apparent cycle formed when augmenting all three of
// these packages by their tests was the original motivation
// for reporting b/7114.)
//
// compress/bzip2.TestBitReader in bzip2_test.go imports io/ioutil
// io/ioutil.TestTempFile in tempfile_test.go imports regexp
// regexp.TestRE2Search in exec_test.go imports compress/bzip2
for _, test := range []struct{ pkg, fn string }{
{"io/ioutil", "TestTempFile"},
{"regexp", "TestRE2Search"},
{"compress/bzip2", "TestBitReader"},
} {
info := prog.Imported[test.pkg]
if info == nil {
t.Errorf("failed to load package %q", test.pkg)
continue
}
obj, _ := info.Pkg.Scope().Lookup(test.fn).(*types.Func)
if obj == nil {
t.Errorf("package %q has no func %q", test.pkg, test.fn)
continue
}
}
// Dump some statistics.
// determine line count
var lineCount int
prog.Fset.Iterate(func(f *token.File) bool {
lineCount += f.LineCount()
return true
})
t.Log("GOMAXPROCS: ", runtime.GOMAXPROCS(0))
t.Log("#Source lines: ", lineCount)
t.Log("Load/parse/typecheck: ", t1.Sub(t0))
t.Log("#MB: ", int64(memstats.Alloc-alloc)/1000000)
}