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// Copyright 2018 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.
// +build cgo
package packages_test
import (
"runtime"
"strings"
"testing"
"golang.org/x/tools/go/packages"
)
func TestLoadImportsC(t *testing.T) {
// This test checks that when a package depends on the
// test variant of "syscall", "unsafe", or "runtime/cgo", that dependency
// is not removed when those packages are added when it imports "C".
//
// For this test to work, the external test of syscall must have a dependency
// on net, and net must import "syscall" and "C".
if runtime.GOOS == "windows" {
t.Skipf("skipping on windows; packages on windows do not satisfy conditions for test.")
}
if runtime.GOOS == "plan9" {
// See https://golang.org/issue/27100.
t.Skip(`skipping on plan9; for some reason "net [syscall.test]" is not loaded`)
}
cfg := &packages.Config{
Mode: packages.LoadImports,
Tests: true,
}
initial, err := packages.Load(cfg, "syscall", "net")
if err != nil {
t.Fatalf("failed to load imports: %v", err)
}
_, all := importGraph(initial)
for _, test := range []struct {
pattern string
wantImport string // an import to check for
}{
{"net", "syscall:syscall"},
{"net [syscall.test]", "syscall:syscall [syscall.test]"},
{"syscall_test [syscall.test]", "net:net [syscall.test]"},
} {
// Test the import paths.
pkg := all[test.pattern]
if pkg == nil {
t.Errorf("package %q not loaded", test.pattern)
continue
}
if imports := strings.Join(imports(pkg), " "); !strings.Contains(imports, test.wantImport) {
t.Errorf("package %q: got \n%s, \nwant to have %s", test.pattern, imports, test.wantImport)
}
}
}
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