130 lines
4.1 KiB
Go
130 lines
4.1 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build go1.11
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package gcimporter
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import (
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"go/types"
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"runtime"
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"strings"
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"testing"
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)
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var importedObjectTests = []struct {
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name string
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want string
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}{
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// non-interfaces
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{"crypto.Hash", "type Hash uint"},
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{"go/ast.ObjKind", "type ObjKind int"},
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{"go/types.Qualifier", "type Qualifier func(*Package) string"},
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{"go/types.Comparable", "func Comparable(T Type) bool"},
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{"math.Pi", "const Pi untyped float"},
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{"math.Sin", "func Sin(x float64) float64"},
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{"go/ast.NotNilFilter", "func NotNilFilter(_ string, v reflect.Value) bool"},
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{"go/internal/gcimporter.BImportData", "func BImportData(fset *go/token.FileSet, imports map[string]*go/types.Package, data []byte, path string) (_ int, pkg *go/types.Package, err error)"},
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// interfaces
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{"context.Context", "type Context interface{Deadline() (deadline time.Time, ok bool); Done() <-chan struct{}; Err() error; Value(key interface{}) interface{}}"},
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{"crypto.Decrypter", "type Decrypter interface{Decrypt(rand io.Reader, msg []byte, opts DecrypterOpts) (plaintext []byte, err error); Public() PublicKey}"},
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{"encoding.BinaryMarshaler", "type BinaryMarshaler interface{MarshalBinary() (data []byte, err error)}"},
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{"io.Reader", "type Reader interface{Read(p []byte) (n int, err error)}"},
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{"io.ReadWriter", "type ReadWriter interface{Reader; Writer}"},
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{"go/ast.Node", "type Node interface{End() go/token.Pos; Pos() go/token.Pos}"},
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{"go/types.Type", "type Type interface{String() string; Underlying() Type}"},
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}
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func TestImportedTypes(t *testing.T) {
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skipSpecialPlatforms(t)
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// This package only handles gc export data.
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if runtime.Compiler != "gc" {
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t.Skipf("gc-built packages not available (compiler = %s)", runtime.Compiler)
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}
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for _, test := range importedObjectTests {
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s := strings.Split(test.name, ".")
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if len(s) != 2 {
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t.Fatal("inconsistent test data")
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}
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importPath := s[0]
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objName := s[1]
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pkg, err := Import(make(map[string]*types.Package), importPath, ".", nil)
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if err != nil {
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t.Error(err)
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continue
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}
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obj := pkg.Scope().Lookup(objName)
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if obj == nil {
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t.Errorf("%s: object not found", test.name)
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continue
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}
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got := types.ObjectString(obj, types.RelativeTo(pkg))
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if got != test.want {
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t.Errorf("%s: got %q; want %q", test.name, got, test.want)
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}
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if named, _ := obj.Type().(*types.Named); named != nil {
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verifyInterfaceMethodRecvs(t, named, 0)
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}
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}
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}
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// verifyInterfaceMethodRecvs verifies that method receiver types
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// are named if the methods belong to a named interface type.
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func verifyInterfaceMethodRecvs(t *testing.T, named *types.Named, level int) {
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// avoid endless recursion in case of an embedding bug that lead to a cycle
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if level > 10 {
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t.Errorf("%s: embeds itself", named)
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return
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}
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iface, _ := named.Underlying().(*types.Interface)
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if iface == nil {
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return // not an interface
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}
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// check explicitly declared methods
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for i := 0; i < iface.NumExplicitMethods(); i++ {
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m := iface.ExplicitMethod(i)
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recv := m.Type().(*types.Signature).Recv()
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if recv == nil {
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t.Errorf("%s: missing receiver type", m)
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continue
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}
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if recv.Type() != named {
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t.Errorf("%s: got recv type %s; want %s", m, recv.Type(), named)
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}
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}
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// check embedded interfaces (if they are named, too)
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for i := 0; i < iface.NumEmbeddeds(); i++ {
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// embedding of interfaces cannot have cycles; recursion will terminate
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if etype, _ := iface.EmbeddedType(i).(*types.Named); etype != nil {
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verifyInterfaceMethodRecvs(t, etype, level+1)
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}
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}
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}
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func TestIssue25301(t *testing.T) {
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skipSpecialPlatforms(t)
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// This package only handles gc export data.
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if runtime.Compiler != "gc" {
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t.Skipf("gc-built packages not available (compiler = %s)", runtime.Compiler)
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}
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// On windows, we have to set the -D option for the compiler to avoid having a drive
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// letter and an illegal ':' in the import path - just skip it (see also issue #3483).
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if runtime.GOOS == "windows" {
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t.Skip("avoid dealing with relative paths/drive letters on windows")
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}
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compileAndImportPkg(t, "issue25301")
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}
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