1 files changed, 238 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/apidiff/apidiff_test.go b/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/apidiff/apidiff_test.go
new file mode 100644
index 0000000..9d55e14
--- /dev/null
+++ b/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/apidiff/apidiff_test.go
@@ -0,0 +1,238 @@
+package apidiff
+
+import (
+	"bufio"
+	"fmt"
+	"go/types"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"sort"
+	"strings"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"golang.org/x/tools/go/packages"
+)
+
+func TestChanges(t *testing.T) {
+	dir, err := ioutil.TempDir("", "apidiff_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	dir = filepath.Join(dir, "go")
+	wanti, wantc := splitIntoPackages(t, dir)
+	defer os.RemoveAll(dir)
+	sort.Strings(wanti)
+	sort.Strings(wantc)
+
+	oldpkg, err := load(t, "apidiff/old", dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	newpkg, err := load(t, "apidiff/new", dir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	report := Changes(oldpkg.Types, newpkg.Types)
+
+	got := report.messages(false)
+	if diff := cmp.Diff(wanti, got); diff != "" {
+		t.Errorf("incompatibles: mismatch (-want, +got)\n%s", diff)
+	}
+	got = report.messages(true)
+	if diff := cmp.Diff(wantc, got); diff != "" {
+		t.Errorf("compatibles: mismatch (-want, +got)\n%s", diff)
+	}
+}
+
+func splitIntoPackages(t *testing.T, dir string) (incompatibles, compatibles []string) {
+	// Read the input file line by line.
+	// Write a line into the old or new package,
+	// dependent on comments.
+	// Also collect expected messages.
+	f, err := os.Open("testdata/tests.go")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	if err := os.MkdirAll(filepath.Join(dir, "src", "apidiff"), 0700); err != nil {
+		t.Fatal(err)
+	}
+	if err := ioutil.WriteFile(filepath.Join(dir, "src", "apidiff", "go.mod"), []byte("module apidiff\n"), 0666); err != nil {
+		t.Fatal(err)
+	}
+
+	oldd := filepath.Join(dir, "src/apidiff/old")
+	newd := filepath.Join(dir, "src/apidiff/new")
+	if err := os.MkdirAll(oldd, 0700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Mkdir(newd, 0700); err != nil && !os.IsExist(err) {
+		t.Fatal(err)
+	}
+
+	oldf, err := os.Create(filepath.Join(oldd, "old.go"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	newf, err := os.Create(filepath.Join(newd, "new.go"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	wl := func(f *os.File, line string) {
+		if _, err := fmt.Fprintln(f, line); err != nil {
+			t.Fatal(err)
+		}
+	}
+	writeBoth := func(line string) { wl(oldf, line); wl(newf, line) }
+	writeln := writeBoth
+	s := bufio.NewScanner(f)
+	for s.Scan() {
+		line := s.Text()
+		tl := strings.TrimSpace(line)
+		switch {
+		case tl == "// old":
+			writeln = func(line string) { wl(oldf, line) }
+		case tl == "// new":
+			writeln = func(line string) { wl(newf, line) }
+		case tl == "// both":
+			writeln = writeBoth
+		case strings.HasPrefix(tl, "// i "):
+			incompatibles = append(incompatibles, strings.TrimSpace(tl[4:]))
+		case strings.HasPrefix(tl, "// c "):
+			compatibles = append(compatibles, strings.TrimSpace(tl[4:]))
+		default:
+			writeln(line)
+		}
+	}
+	if s.Err() != nil {
+		t.Fatal(s.Err())
+	}
+	return
+}
+
+func load(t *testing.T, importPath, goPath string) (*packages.Package, error) {
+	needsGoPackages(t)
+
+	cfg := &packages.Config{
+		Mode: packages.LoadTypes,
+	}
+	if goPath != "" {
+		cfg.Env = append(os.Environ(), "GOPATH="+goPath)
+		cfg.Dir = filepath.Join(goPath, "src", filepath.FromSlash(importPath))
+	}
+	pkgs, err := packages.Load(cfg, importPath)
+	if err != nil {
+		return nil, err
+	}
+	if len(pkgs[0].Errors) > 0 {
+		return nil, pkgs[0].Errors[0]
+	}
+	return pkgs[0], nil
+}
+
+func TestExportedFields(t *testing.T) {
+	pkg, err := load(t, "golang.org/x/exp/apidiff/testdata/exported_fields", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	typeof := func(name string) types.Type {
+		return pkg.Types.Scope().Lookup(name).Type()
+	}
+
+	s := typeof("S")
+	su := s.(*types.Named).Underlying().(*types.Struct)
+
+	ef := exportedSelectableFields(su)
+	wants := []struct {
+		name string
+		typ  types.Type
+	}{
+		{"A1", typeof("A1")},
+		{"D", types.Typ[types.Bool]},
+		{"E", types.Typ[types.Int]},
+		{"F", typeof("F")},
+		{"S", types.NewPointer(s)},
+	}
+
+	if got, want := len(ef), len(wants); got != want {
+		t.Errorf("got %d fields, want %d\n%+v", got, want, ef)
+	}
+	for _, w := range wants {
+		if got := ef[w.name]; got != nil && !types.Identical(got.Type(), w.typ) {
+			t.Errorf("%s: got %v, want %v", w.name, got.Type(), w.typ)
+		}
+	}
+}
+
+// needsGoPackages skips t if the go/packages driver (or 'go' tool) implied by
+// the current process environment is not present in the path.
+//
+// Copied and adapted from golang.org/x/tools/internal/testenv.
+func needsGoPackages(t *testing.T) {
+	t.Helper()
+
+	tool := os.Getenv("GOPACKAGESDRIVER")
+	switch tool {
+	case "off":
+		// "off" forces go/packages to use the go command.
+		tool = "go"
+	case "":
+		if _, err := exec.LookPath("gopackagesdriver"); err == nil {
+			tool = "gopackagesdriver"
+		} else {
+			tool = "go"
+		}
+	}
+
+	needsTool(t, tool)
+}
+
+// needsTool skips t if the named tool is not present in the path.
+//
+// Copied and adapted from golang.org/x/tools/internal/testenv.
+func needsTool(t *testing.T, tool string) {
+	_, err := exec.LookPath(tool)
+	if err == nil {
+		return
+	}
+
+	t.Helper()
+	if allowMissingTool(tool) {
+		t.Skipf("skipping because %s tool not available: %v", tool, err)
+	} else {
+		t.Fatalf("%s tool not available: %v", tool, err)
+	}
+}
+
+func allowMissingTool(tool string) bool {
+	if runtime.GOOS == "android" {
+		// Android builds generally run tests on a separate machine from the build,
+		// so don't expect any external tools to be available.
+		return true
+	}
+
+	if tool == "go" && os.Getenv("GO_BUILDER_NAME") == "illumos-amd64-joyent" {
+		// Work around a misconfigured builder (see https://golang.org/issue/33950).
+		return true
+	}
+
+	// If a developer is actively working on this test, we expect them to have all
+	// of its dependencies installed. However, if it's just a dependency of some
+	// other module (for example, being run via 'go test all'), we should be more
+	// tolerant of unusual environments.
+	return !packageMainIsDevel()
+}
+
+// packageMainIsDevel reports whether the module containing package main
+// is a development version (if module information is available).
+//
+// Builds in GOPATH mode and builds that lack module information are assumed to
+// be development versions.
+var packageMainIsDevel = func() bool { return true }