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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package gccgoexportdata_test
import (
"go/types"
"os"
"testing"
"golang.org/x/tools/go/gccgoexportdata"
)
// Test ensures this package can read gccgo export data from the
// .go_export from a standalone ELF file or such a file in an archive
// library.
//
// The testdata/{short,long}.a ELF archive files were produced by:
//
// $ echo 'package foo; func F()' > foo.go
// $ gccgo -c -fgo-pkgpath blah foo.go
// $ objcopy -j .go_export foo.o foo.gox
// $ ar q short.a foo.gox
// $ objcopy -j .go_export foo.o name-longer-than-16-bytes.gox
// $ ar q long.a name-longer-than-16-bytes.gox
//
// The file long.a contains an archive string table.
//
// The errors.gox file (an ELF object file) comes from the toolchain's
// standard library.
func Test(t *testing.T) {
for _, test := range []struct {
filename, path, member, wantType string
}{
{"testdata/errors.gox", "errors", "New", "func(text string) error"},
{"testdata/short.a", "short", "F", "func()"},
{"testdata/long.a", "long", "F", "func()"},
} {
t.Logf("filename = %s", test.filename)
f, err := os.Open(test.filename)
if err != nil {
t.Error(err)
continue
}
defer f.Close()
r, err := gccgoexportdata.NewReader(f)
if err != nil {
t.Error(err)
continue
}
imports := make(map[string]*types.Package)
pkg, err := gccgoexportdata.Read(r, nil, imports, test.path)
if err != nil {
t.Error(err)
continue
}
// Check type of designated package member.
obj := pkg.Scope().Lookup(test.member)
if obj == nil {
t.Errorf("%s.%s not found", test.path, test.member)
continue
}
if obj.Type().String() != test.wantType {
t.Errorf("%s.%s.Type = %s, want %s",
test.path, test.member, obj.Type(), test.wantType)
}
}
}
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