1 files changed, 59 insertions, 0 deletions
diff --git a/libgo/go/cmd/go/internal/modload/import_test.go b/libgo/go/cmd/go/internal/modload/import_test.go
new file mode 100644
index 00000000000..3f4ddab436c
--- /dev/null
+++ b/libgo/go/cmd/go/internal/modload/import_test.go
@@ -0,0 +1,59 @@
+// Copyright 2018 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 modload
+
+import (
+	"internal/testenv"
+	"regexp"
+	"strings"
+	"testing"
+)
+
+var importTests = []struct {
+	path string
+	err  string
+}{
+	{
+		path: "golang.org/x/net/context",
+		err:  "missing module for import: golang.org/x/net@.* provides golang.org/x/net/context",
+	},
+	{
+		path: "golang.org/x/net",
+		err:  "cannot find module providing package golang.org/x/net",
+	},
+	{
+		path: "golang.org/x/text",
+		err:  "missing module for import: golang.org/x/text@.* provides golang.org/x/text",
+	},
+	{
+		path: "github.com/rsc/quote/buggy",
+		err:  "missing module for import: github.com/rsc/quote@v1.5.2 provides github.com/rsc/quote/buggy",
+	},
+	{
+		path: "github.com/rsc/quote",
+		err:  "missing module for import: github.com/rsc/quote@v1.5.2 provides github.com/rsc/quote",
+	},
+	{
+		path: "golang.org/x/foo/bar",
+		err:  "cannot find module providing package golang.org/x/foo/bar",
+	},
+}
+
+func TestImport(t *testing.T) {
+	testenv.MustHaveExternalNetwork(t)
+
+	for _, tt := range importTests {
+		t.Run(strings.Replace(tt.path, "/", "_", -1), func(t *testing.T) {
+			// Note that there is no build list, so Import should always fail.
+			m, dir, err := Import(tt.path)
+			if err == nil {
+				t.Fatalf("Import(%q) = %v, %v, nil; expected error", tt.path, m, dir)
+			}
+			if !regexp.MustCompile(tt.err).MatchString(err.Error()) {
+				t.Fatalf("Import(%q): error %q, want error matching %#q", tt.path, err, tt.err)
+			}
+		})
+	}
+}