135 lines
3 KiB
Go
135 lines
3 KiB
Go
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// Copyright 2021 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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// Issue 42580: cmd/cgo: shifting identifier position in ast
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package errorstest
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import (
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"bytes"
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"fmt"
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"go/ast"
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"go/parser"
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"go/token"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"testing"
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)
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type ShortPosition struct {
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Line int
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Column int
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Visited bool
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}
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type IdentPositionInfo map[string][]ShortPosition
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type Visitor struct {
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identPosInfo IdentPositionInfo
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fset *token.FileSet
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t *testing.T
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}
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func (v *Visitor) Visit(node ast.Node) ast.Visitor {
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if ident, ok := node.(*ast.Ident); ok {
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if expectedPositions, ok := v.identPosInfo[ident.Name]; ok {
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gotMatch := false
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var errorMessage strings.Builder
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for caseIndex, expectedPos := range expectedPositions {
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actualPosition := v.fset.PositionFor(ident.Pos(), true)
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errorOccured := false
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if expectedPos.Line != actualPosition.Line {
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fmt.Fprintf(&errorMessage, "wrong line number for ident %s: expected: %d got: %d\n", ident.Name, expectedPos.Line, actualPosition.Line)
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errorOccured = true
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}
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if expectedPos.Column != actualPosition.Column {
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fmt.Fprintf(&errorMessage, "wrong column number for ident %s: expected: %d got: %d\n", ident.Name, expectedPos.Column, actualPosition.Column)
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errorOccured = true
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}
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if errorOccured {
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continue
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}
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gotMatch = true
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expectedPositions[caseIndex].Visited = true
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}
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if !gotMatch {
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v.t.Errorf(errorMessage.String())
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}
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}
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}
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return v
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}
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func TestArgumentsPositions(t *testing.T) {
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testdata, err := filepath.Abs("testdata")
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if err != nil {
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t.Fatal(err)
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}
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tmpPath := t.TempDir()
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dir := filepath.Join(tmpPath, "src", "testpositions")
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if err := os.MkdirAll(dir, 0755); err != nil {
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t.Fatal(err)
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}
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cmd := exec.Command("go", "tool", "cgo",
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"-srcdir", testdata,
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"-objdir", dir,
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"issue42580.go")
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cmd.Stderr = new(bytes.Buffer)
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err = cmd.Run()
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if err != nil {
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t.Fatalf("%s: %v\n%s", cmd, err, cmd.Stderr)
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}
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mainProcessed, err := ioutil.ReadFile(filepath.Join(dir, "issue42580.cgo1.go"))
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if err != nil {
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t.Fatal(err)
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}
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fset := token.NewFileSet()
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f, err := parser.ParseFile(fset, "", mainProcessed, parser.AllErrors)
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if err != nil {
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fmt.Println(err)
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return
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}
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expectation := IdentPositionInfo{
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"checkedPointer": []ShortPosition{
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ShortPosition{
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Line: 32,
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Column: 56,
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},
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},
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"singleInnerPointerChecked": []ShortPosition{
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ShortPosition{
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Line: 37,
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Column: 91,
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},
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},
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"doublePointerChecked": []ShortPosition{
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ShortPosition{
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Line: 42,
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Column: 91,
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},
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},
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}
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for _, decl := range f.Decls {
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if fdecl, ok := decl.(*ast.FuncDecl); ok {
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ast.Walk(&Visitor{expectation, fset, t}, fdecl.Body)
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}
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}
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for ident, positions := range expectation {
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for _, position := range positions {
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if !position.Visited {
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t.Errorf("Position %d:%d missed for %s ident", position.Line, position.Column, ident)
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}
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}
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}
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}
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