// TestVeryLongFile tests the position of an import object declared in
// a very long input file. Line numbers greater than maxlines are
// reported as line 1, not garbage or token.NoPos.
func TestVeryLongFile(t *testing.T) {
// parse and typecheck
longFile := "package foo" + strings.Repeat("\n", 123456) + "var X int"
fset1 := token.NewFileSet()
f, err := parser.ParseFile(fset1, "foo.go", longFile, 0)
if err != nil {
t.Fatal(err)
}
var conf types.Config
pkg, err := conf.Check("foo", fset1, []*ast.File{f}, nil)
if err != nil {
t.Fatal(err)
}
// export
exportdata := gcimporter.BExportData(fset1, pkg)
// import
imports := make(map[string]*types.Package)
fset2 := token.NewFileSet()
_, pkg2, err := gcimporter.BImportData(fset2, imports, exportdata, pkg.Path())
if err != nil {
t.Fatalf("BImportData(%s): %v", pkg.Path(), err)
}
// compare
posn1 := fset1.Position(pkg.Scope().Lookup("X").Pos())
posn2 := fset2.Position(pkg2.Scope().Lookup("X").Pos())
if want := "foo.go:1:1"; posn2.String() != want {
t.Errorf("X position = %s, want %s (orig was %s)",
posn2, want, posn1)
}
}
func disabledTestInvalidAlias(t *testing.T) {
// parse and typecheck
const src = "package p; func InvalidAlias => foo.f"
fset1 := token.NewFileSet()
f, err := parser.ParseFile(fset1, "p.go", src, 0)
if err != nil {
t.Fatal(err)
}
var conf types.Config
pkg, err := conf.Check("p", fset1, []*ast.File{f}, nil)
if err == nil {
t.Fatal("invalid source type-checked without error")
}
if pkg == nil {
t.Fatal("nil package returned")
}
// export
exportdata := gcimporter.BExportData(fset1, pkg)
// import
imports := make(map[string]*types.Package)
fset2 := token.NewFileSet()
_, pkg2, err := gcimporter.BImportData(fset2, imports, exportdata, pkg.Path())
if err != nil {
t.Fatalf("BImportData(%s): %v", pkg.Path(), err)
}
// pkg2 must contain InvalidAlias as an invalid Alias
obj := pkg2.Scope().Lookup("InvalidAlias")
if obj == nil {
t.Fatal("InvalidAlias not found")
}
alias, ok := obj.(*types.Alias)
if !ok {
t.Fatalf("got %v; want alias", alias)
}
if alias.Type() != types.Typ[types.Invalid] || alias.Orig() != nil {
t.Fatalf("got %v (orig = %v); want invalid alias", alias, alias.Orig())
}
}
func TestBExportData_stdlib(t *testing.T) {
if runtime.GOOS == "android" {
t.Skipf("incomplete std lib on %s", runtime.GOOS)
}
// Load, parse and type-check the program.
ctxt := build.Default // copy
ctxt.GOPATH = "" // disable GOPATH
conf := loader.Config{
Build: &ctxt,
AllowErrors: true,
}
for _, path := range buildutil.AllPackages(conf.Build) {
conf.Import(path)
}
// Create a package containing type and value errors to ensure
// they are properly encoded/decoded.
f, err := conf.ParseFile("haserrors/haserrors.go", `package haserrors
const UnknownValue = "" + 0
type UnknownType undefined
`)
if err != nil {
t.Fatal(err)
}
conf.CreateFromFiles("haserrors", f)
prog, err := conf.Load()
if err != nil {
t.Fatalf("Load failed: %v", err)
}
numPkgs := len(prog.AllPackages)
if want := 248; numPkgs < want {
t.Errorf("Loaded only %d packages, want at least %d", numPkgs, want)
}
for pkg, info := range prog.AllPackages {
if info.Files == nil {
continue // empty directory
}
exportdata := gcimporter.BExportData(conf.Fset, pkg)
imports := make(map[string]*types.Package)
fset2 := token.NewFileSet()
n, pkg2, err := gcimporter.BImportData(fset2, imports, exportdata, pkg.Path())
if err != nil {
t.Errorf("BImportData(%s): %v", pkg.Path(), err)
continue
}
if n != len(exportdata) {
t.Errorf("BImportData(%s) decoded %d bytes, want %d",
pkg.Path(), n, len(exportdata))
}
// Compare the packages' corresponding members.
for _, name := range pkg.Scope().Names() {
if !ast.IsExported(name) {
continue
}
obj1 := pkg.Scope().Lookup(name)
obj2 := pkg2.Scope().Lookup(name)
if obj2 == nil {
t.Errorf("%s.%s not found, want %s", pkg.Path(), name, obj1)
continue
}
fl1 := fileLine(conf.Fset, obj1)
fl2 := fileLine(fset2, obj2)
if fl1 != fl2 {
t.Errorf("%s.%s: got posn %s, want %s",
pkg.Path(), name, fl2, fl1)
}
if err := equalObj(obj1, obj2); err != nil {
t.Errorf("%s.%s: %s\ngot: %s\nwant: %s",
pkg.Path(), name, err, obj2, obj1)
}
}
}
}
// Write writes encoded type information for the specified package to out.
// The FileSet provides file position information for named objects.
func Write(out io.Writer, fset *token.FileSet, pkg *types.Package) error {
_, err := out.Write(gcimporter.BExportData(fset, pkg))
return err
}