1 files changed, 88 insertions, 0 deletions
diff --git a/libgo/go/cmd/internal/quoted/quoted_test.go b/libgo/go/cmd/internal/quoted/quoted_test.go
new file mode 100644
index 00000000000..d76270c87b4
--- /dev/null
+++ b/libgo/go/cmd/internal/quoted/quoted_test.go
@@ -0,0 +1,88 @@
+// Copyright 2020 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 quoted
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestSplit(t *testing.T) {
+	for _, test := range []struct {
+		name    string
+		value   string
+		want    []string
+		wantErr string
+	}{
+		{name: "empty", value: "", want: nil},
+		{name: "space", value: " ", want: nil},
+		{name: "one", value: "a", want: []string{"a"}},
+		{name: "leading_space", value: " a", want: []string{"a"}},
+		{name: "trailing_space", value: "a ", want: []string{"a"}},
+		{name: "two", value: "a b", want: []string{"a", "b"}},
+		{name: "two_multi_space", value: "a  b", want: []string{"a", "b"}},
+		{name: "two_tab", value: "a\tb", want: []string{"a", "b"}},
+		{name: "two_newline", value: "a\nb", want: []string{"a", "b"}},
+		{name: "quote_single", value: `'a b'`, want: []string{"a b"}},
+		{name: "quote_double", value: `"a b"`, want: []string{"a b"}},
+		{name: "quote_both", value: `'a '"b "`, want: []string{"a ", "b "}},
+		{name: "quote_contains", value: `'a "'"'b"`, want: []string{`a "`, `'b`}},
+		{name: "escape", value: `\'`, want: []string{`\'`}},
+		{name: "quote_unclosed", value: `'a`, wantErr: "unterminated ' string"},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := Split(test.value)
+			if err != nil {
+				if test.wantErr == "" {
+					t.Fatalf("unexpected error: %v", err)
+				} else if errMsg := err.Error(); !strings.Contains(errMsg, test.wantErr) {
+					t.Fatalf("error %q does not contain %q", errMsg, test.wantErr)
+				}
+				return
+			}
+			if test.wantErr != "" {
+				t.Fatalf("unexpected success; wanted error containing %q", test.wantErr)
+			}
+			if !reflect.DeepEqual(got, test.want) {
+				t.Errorf("got %q; want %q", got, test.want)
+			}
+		})
+	}
+}
+
+func TestJoin(t *testing.T) {
+	for _, test := range []struct {
+		name          string
+		args          []string
+		want, wantErr string
+	}{
+		{name: "empty", args: nil, want: ""},
+		{name: "one", args: []string{"a"}, want: "a"},
+		{name: "two", args: []string{"a", "b"}, want: "a b"},
+		{name: "space", args: []string{"a ", "b"}, want: "'a ' b"},
+		{name: "newline", args: []string{"a\n", "b"}, want: "'a\n' b"},
+		{name: "quote", args: []string{`'a `, "b"}, want: `"'a " b`},
+		{name: "unquoteable", args: []string{`'"`}, wantErr: "contains both single and double quotes and cannot be quoted"},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := Join(test.args)
+			if err != nil {
+				if test.wantErr == "" {
+					t.Fatalf("unexpected error: %v", err)
+				} else if errMsg := err.Error(); !strings.Contains(errMsg, test.wantErr) {
+					t.Fatalf("error %q does not contain %q", errMsg, test.wantErr)
+				}
+				return
+			}
+			if test.wantErr != "" {
+				t.Fatalf("unexpected success; wanted error containing %q", test.wantErr)
+			}
+			if got != test.want {
+				t.Errorf("got %s; want %s", got, test.want)
+			}
+		})
+	}
+}