misc/swig: move tests to cmd/cgo/internal

This moves the misc/swig test to cmd/cgo/internal.

This lets these tests access facilities in internal/testenv. It's also
now just a normal test that can run as part of the cmd tests.

For #37486.

Change-Id: Ibe5026219999d175aa0a310b9886bef3f6f9ed17
Reviewed-on: https://go-review.googlesource.com/c/go/+/492722
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>

8 files changed, 0 insertions, 338 deletions

diff --git a/misc/swig/nocgo_test.go b/misc/swig/nocgo_test.go
deleted file mode 100644
index c68b97d6b6..0000000000
--- a/misc/swig/nocgo_test.go
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright 2023 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.
-
-// This file is just to avoid build errors if there's no cgo.
-
-package swig
diff --git a/misc/swig/swig_test.go b/misc/swig/swig_test.go
deleted file mode 100644
index cbe062ae41..0000000000
--- a/misc/swig/swig_test.go
+++ /dev/null
@@ -1,149 +0,0 @@
-// Copyright 2023 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.
-
-//go:build cgo
-
-package swig
-
-import (
-	"bytes"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"regexp"
-	"strconv"
-	"strings"
-	"sync"
-	"testing"
-)
-
-func TestStdio(t *testing.T) {
-	mustHaveSwig(t)
-	run(t, "testdata/stdio", false)
-}
-
-func TestCall(t *testing.T) {
-	mustHaveSwig(t)
-	mustHaveCxx(t)
-	run(t, "testdata/callback", false, "Call")
-	t.Run("lto", func(t *testing.T) { run(t, "testdata/callback", true, "Call") })
-}
-
-func TestCallback(t *testing.T) {
-	mustHaveSwig(t)
-	mustHaveCxx(t)
-	run(t, "testdata/callback", false, "Callback")
-	t.Run("lto", func(t *testing.T) { run(t, "testdata/callback", true, "Callback") })
-}
-
-func run(t *testing.T, dir string, lto bool, args ...string) {
-	runArgs := append([]string{"run", "."}, args...)
-	cmd := exec.Command("go", runArgs...)
-	cmd.Dir = dir
-	if lto {
-		const cflags = "-flto -Wno-lto-type-mismatch -Wno-unknown-warning-option"
-		cmd.Env = append(cmd.Environ(),
-			"CGO_CFLAGS="+cflags,
-			"CGO_CXXFLAGS="+cflags,
-			"CGO_LDFLAGS="+cflags)
-	}
-	out, err := cmd.CombinedOutput()
-	if string(out) != "OK\n" {
-		t.Errorf("%s", string(out))
-	}
-	if err != nil {
-		t.Errorf("%s", err)
-	}
-}
-
-func mustHaveCxx(t *testing.T) {
-	// Ask the go tool for the CXX it's configured to use.
-	cxx, err := exec.Command("go", "env", "CXX").CombinedOutput()
-	if err != nil {
-		t.Fatalf("go env CXX failed: %s", err)
-	}
-	cxx = bytes.TrimSuffix(cxx, []byte("\n"))
-	// TODO(austin): "go env CXX" can return a quoted list. Use quoted.Split.
-	p, err := exec.LookPath(string(cxx))
-	if p == "" {
-		t.Skipf("test requires C++ compiler, but failed to find %s: %s", string(cxx), err)
-	}
-}
-
-var (
-	swigOnce sync.Once
-	haveSwig bool
-)
-
-func mustHaveSwig(t *testing.T) {
-	swigOnce.Do(func() {
-		mustHaveSwigOnce(t)
-		haveSwig = true
-	})
-	// The first call will skip t with a nice message. On later calls, we just skip.
-	if !haveSwig {
-		t.Skip("swig not found")
-	}
-}
-
-func mustHaveSwigOnce(t *testing.T) {
-	swig, err := exec.LookPath("swig")
-	if err != nil {
-		t.Skipf("swig not in PATH: %s", err)
-	}
-
-	// Check that swig was installed with Go support by checking
-	// that a go directory exists inside the swiglib directory.
-	// See https://golang.org/issue/23469.
-	output, err := exec.Command(swig, "-go", "-swiglib").Output()
-	if err != nil {
-		t.Skip("swig is missing Go support")
-	}
-	swigDir := strings.TrimSpace(string(output))
-
-	_, err = os.Stat(filepath.Join(swigDir, "go"))
-	if err != nil {
-		t.Skip("swig is missing Go support")
-	}
-
-	// Check that swig has a new enough version.
-	// See https://golang.org/issue/22858.
-	out, err := exec.Command(swig, "-version").CombinedOutput()
-	if err != nil {
-		t.Skipf("failed to get swig version:%s\n%s", err, string(out))
-	}
-
-	re := regexp.MustCompile(`[vV]ersion +(\d+)([.]\d+)?([.]\d+)?`)
-	matches := re.FindSubmatch(out)
-	if matches == nil {
-		// Can't find version number; hope for the best.
-		t.Logf("failed to find swig version, continuing")
-		return
-	}
-
-	var parseError error
-	atoi := func(s string) int {
-		x, err := strconv.Atoi(s)
-		if err != nil && parseError == nil {
-			parseError = err
-		}
-		return x
-	}
-	var major, minor, patch int
-	major = atoi(string(matches[1]))
-	if len(matches[2]) > 0 {
-		minor = atoi(string(matches[2][1:]))
-	}
-	if len(matches[3]) > 0 {
-		patch = atoi(string(matches[3][1:]))
-	}
-	if parseError != nil {
-		t.Logf("error parsing swig version %q, continuing anyway: %s", string(matches[0]), parseError)
-		return
-	}
-	t.Logf("found swig version %d.%d.%d", major, minor, patch)
-	if major < 3 || (major == 3 && minor == 0 && patch < 6) {
-		t.Skip("test requires swig 3.0.6 or later")
-	}
-}
diff --git a/misc/swig/testdata/callback/main.cc b/misc/swig/testdata/callback/main.cc
deleted file mode 100644
index 7de917cde4..0000000000
--- a/misc/swig/testdata/callback/main.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2013 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.
-
-// This .cc file will be automatically compiled by the go tool and
-// included in the package.
-
-#include <string>
-#include "main.h"
-
-std::string Caller::call() {
-	if (callback_ != 0)
-		return callback_->run();
-	return "";
-}
diff --git a/misc/swig/testdata/callback/main.go b/misc/swig/testdata/callback/main.go
deleted file mode 100644
index 73034a0c7c..0000000000
--- a/misc/swig/testdata/callback/main.go
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2012 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 main
-
-import (
-	"fmt"
-	"os"
-)
-
-func main() {
-	if len(os.Args) != 2 {
-		fatal("usage: callback testname")
-	}
-	switch os.Args[1] {
-	default:
-		fatal("unknown test %q", os.Args[1])
-	case "Call":
-		testCall()
-	case "Callback":
-		testCallback()
-	}
-	println("OK")
-}
-
-func fatal(f string, args ...any) {
-	fmt.Fprintln(os.Stderr, fmt.Sprintf(f, args...))
-	os.Exit(1)
-}
-
-type GoCallback struct{}
-
-func (p *GoCallback) Run() string {
-	return "GoCallback.Run"
-}
-
-func testCall() {
-	c := NewCaller()
-	cb := NewCallback()
-
-	c.SetCallback(cb)
-	s := c.Call()
-	if s != "Callback::run" {
-		fatal("unexpected string from Call: %q", s)
-	}
-	c.DelCallback()
-}
-
-func testCallback() {
-	c := NewCaller()
-	cb := NewDirectorCallback(&GoCallback{})
-	c.SetCallback(cb)
-	s := c.Call()
-	if s != "GoCallback.Run" {
-		fatal("unexpected string from Call with callback: %q", s)
-	}
-	c.DelCallback()
-	DeleteDirectorCallback(cb)
-}
diff --git a/misc/swig/testdata/callback/main.h b/misc/swig/testdata/callback/main.h
deleted file mode 100644
index 4b661060d8..0000000000
--- a/misc/swig/testdata/callback/main.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2011 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.
-
-class Callback {
-public:
-	virtual ~Callback() { }
-	virtual std::string run() { return "Callback::run"; }
-};
-
-class Caller {
-private:
-	Callback *callback_;
-public:
-	Caller(): callback_(0) { }
-	~Caller() { delCallback(); }
-	void delCallback() { delete callback_; callback_ = 0; }
-	void setCallback(Callback *cb) { delCallback(); callback_ = cb; }
-	std::string call();
-};
diff --git a/misc/swig/testdata/callback/main.swigcxx b/misc/swig/testdata/callback/main.swigcxx
deleted file mode 100644
index 0fd73d6362..0000000000
--- a/misc/swig/testdata/callback/main.swigcxx
+++ /dev/null
@@ -1,18 +0,0 @@
-/* Copyright 2011 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.  */
-
-/* An example of writing a C++ virtual function in Go.  */
-
-%module(directors="1") callback
-
-%{
-#include <string>
-#include "main.h"
-%}
-
-%include "std_string.i"
-
-%feature("director");
-
-%include "main.h"
diff --git a/misc/swig/testdata/stdio/main.go b/misc/swig/testdata/stdio/main.go
deleted file mode 100644
index 0296dd3224..0000000000
--- a/misc/swig/testdata/stdio/main.go
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2017 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.
-
-// This file is here just to cause problems.
-// main.swig turns into a file also named main.go.
-// Make sure cmd/go keeps them separate
-// when both are passed to cgo.
-
-package main
-
-//int F(void) { return 1; }
-import "C"
-import (
-	"fmt"
-	"os"
-)
-
-func F() int { return int(C.F()) }
-
-func main() {
-	if x := int(C.F()); x != 1 {
-		fatal("x = %d, want 1", x)
-	}
-
-	// Open this file itself and verify that the first few characters are
-	// as expected.
-	f := Fopen("main.go", "r")
-	if f.Swigcptr() == 0 {
-		fatal("fopen failed")
-	}
-	if Fgetc(f) != '/' || Fgetc(f) != '/' || Fgetc(f) != ' ' || Fgetc(f) != 'C' {
-		fatal("read unexpected characters")
-	}
-	if Fclose(f) != 0 {
-		fatal("fclose failed")
-	}
-
-	println("OK")
-}
-
-func fatal(f string, args ...any) {
-	fmt.Fprintln(os.Stderr, fmt.Sprintf(f, args...))
-	os.Exit(1)
-}
diff --git a/misc/swig/testdata/stdio/main.swig b/misc/swig/testdata/stdio/main.swig
deleted file mode 100644
index b28ae0a6b7..0000000000
--- a/misc/swig/testdata/stdio/main.swig
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Copyright 2011 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.  */
-
-/* A trivial example of wrapping a C library using SWIG.  */
-
-%{
-#include <stdio.h>
-#include <stdlib.h>
-%}
-
-%typemap(gotype) const char * "string"
-%typemap(in) const char * %{
-	$1 = malloc($input.n + 1);
-	memcpy($1, $input.p, $input.n);
-	$1[$input.n] = '\0';
-%}
-%typemap(freearg) const char * %{
-	free($1);
-%}
-
-FILE *fopen(const char *name, const char *mode);
-int fclose(FILE *);
-int fgetc(FILE *);