github.com/jhump/golang-x-tools@v0.0.0-20220218190644-4958d6d39439/go/gcexportdata/gcexportdata_test.go (about)

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package gcexportdata_test
     6  
     7  import (
     8  	"go/token"
     9  	"go/types"
    10  	"log"
    11  	"os"
    12  	"testing"
    13  
    14  	"github.com/jhump/golang-x-tools/go/gcexportdata"
    15  )
    16  
    17  // Test to ensure that gcexportdata can read files produced by App
    18  // Engine Go runtime v1.6.
    19  func TestAppEngine16(t *testing.T) {
    20  	// Open and read the file.
    21  	f, err := os.Open("testdata/errors-ae16.a")
    22  	if err != nil {
    23  		t.Fatal(err)
    24  	}
    25  	defer f.Close()
    26  	r, err := gcexportdata.NewReader(f)
    27  	if err != nil {
    28  		log.Fatalf("reading export data: %v", err)
    29  	}
    30  
    31  	// Decode the export data.
    32  	fset := token.NewFileSet()
    33  	imports := make(map[string]*types.Package)
    34  	pkg, err := gcexportdata.Read(r, fset, imports, "errors")
    35  	if err != nil {
    36  		log.Fatal(err)
    37  	}
    38  
    39  	// Print package information.
    40  	got := pkg.Scope().Lookup("New").Type().String()
    41  	want := "func(text string) error"
    42  	if got != want {
    43  		t.Errorf("New.Type = %s, want %s", got, want)
    44  	}
    45  }