Adding upstream version 1.20.14.upstream/1.20.14upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/src/go/importer/importer_test.go b/src/go/importer/importer_test.go
new file mode 100644
index 0000000..142efd3
--- /dev/null
+++ b/src/go/importer/importer_test.go
@@ -0,0 +1,96 @@
+// 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.
+
+package importer
+
+import (
+	"go/build"
+	"go/token"
+	"internal/buildcfg"
+	"internal/testenv"
+	"io"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	build.Default.GOROOT = testenv.GOROOT(nil)
+	os.Exit(m.Run())
+}
+
+func TestForCompiler(t *testing.T) {
+	testenv.MustHaveGoBuild(t)
+
+	const thePackage = "math/big"
+	out, err := testenv.Command(t, testenv.GoToolPath(t), "list", "-export", "-f={{context.Compiler}}:{{.Export}}", thePackage).CombinedOutput()
+	if err != nil {
+		t.Fatalf("go list %s: %v\n%s", thePackage, err, out)
+	}
+	export := strings.TrimSpace(string(out))
+	compiler, target, _ := strings.Cut(export, ":")
+
+	if compiler == "gccgo" {
+		t.Skip("golang.org/issue/22500")
+	}
+
+	fset := token.NewFileSet()
+
+	t.Run("LookupDefault", func(t *testing.T) {
+		imp := ForCompiler(fset, compiler, nil)
+		pkg, err := imp.Import(thePackage)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if pkg.Path() != thePackage {
+			t.Fatalf("Path() = %q, want %q", pkg.Path(), thePackage)
+		}
+
+		// Check that the fileset positions are accurate.
+		// https://github.com/golang/go#28995
+		mathBigInt := pkg.Scope().Lookup("Int")
+		posn := fset.Position(mathBigInt.Pos()) // "$GOROOT/src/math/big/int.go:25:1"
+		filename := strings.Replace(posn.Filename, "$GOROOT", testenv.GOROOT(t), 1)
+		data, err := os.ReadFile(filename)
+		if err != nil {
+			t.Fatalf("can't read file containing declaration of math/big.Int: %v", err)
+		}
+		lines := strings.Split(string(data), "\n")
+		if posn.Line > len(lines) || !strings.HasPrefix(lines[posn.Line-1], "type Int") {
+			t.Fatalf("Object %v position %s does not contain its declaration",
+				mathBigInt, posn)
+		}
+	})
+
+	t.Run("LookupCustom", func(t *testing.T) {
+		// TODO(mdempsky): Decide whether to remove this test, or to fix
+		// support for it in unified IR. It's not clear that we actually
+		// need to support importing "math/big" as "math/bigger", for
+		// example. cmd/link no longer supports that.
+		if buildcfg.Experiment.Unified {
+			t.Skip("not supported by GOEXPERIMENT=unified; see go.dev/cl/406319")
+		}
+
+		lookup := func(path string) (io.ReadCloser, error) {
+			if path != "math/bigger" {
+				t.Fatalf("lookup called with unexpected path %q", path)
+			}
+			f, err := os.Open(target)
+			if err != nil {
+				t.Fatal(err)
+			}
+			return f, nil
+		}
+		imp := ForCompiler(fset, compiler, lookup)
+		pkg, err := imp.Import("math/bigger")
+		if err != nil {
+			t.Fatal(err)
+		}
+		// Even though we open math/big.a, the import request was for math/bigger
+		// and that should be recorded in pkg.Path(), at least for the gc toolchain.
+		if pkg.Path() != "math/bigger" {
+			t.Fatalf("Path() = %q, want %q", pkg.Path(), "math/bigger")
+		}
+	})
+}