--- /dev/null
+// Copyright 2019 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 span_test
+
+import (
+ "fmt"
+ "path/filepath"
+ "strings"
+ "testing"
+
+ "golang.org/x/tools/internal/span"
+)
+
+var (
+ tests = [][]string{
+ {"C:/file_a", "C:/file_a", "file:///C:/file_a:1:1#0"},
+ {"C:/file_b:1:2", "C:/file_b:#1", "file:///C:/file_b:1:2#1"},
+ {"C:/file_c:1000", "C:/file_c:#9990", "file:///C:/file_c:1000:1#9990"},
+ {"C:/file_d:14:9", "C:/file_d:#138", "file:///C:/file_d:14:9#138"},
+ {"C:/file_e:1:2-7", "C:/file_e:#1-#6", "file:///C:/file_e:1:2#1-1:7#6"},
+ {"C:/file_f:500-502", "C:/file_f:#4990-#5010", "file:///C:/file_f:500:1#4990-502:1#5010"},
+ {"C:/file_g:3:7-8", "C:/file_g:#26-#27", "file:///C:/file_g:3:7#26-3:8#27"},
+ {"C:/file_h:3:7-4:8", "C:/file_h:#26-#37", "file:///C:/file_h:3:7#26-4:8#37"},
+ }
+)
+
+func TestFormat(t *testing.T) {
+ converter := lines(10)
+ for _, test := range tests {
+ for ti, text := range test[:2] {
+ spn := span.Parse(text)
+ if ti <= 1 {
+ // we can check %v produces the same as the input
+ expect := toPath(test[ti])
+ if got := fmt.Sprintf("%v", spn); got != expect {
+ t.Errorf("printing %q got %q expected %q", text, got, expect)
+ }
+ }
+ complete, err := spn.WithAll(converter)
+ if err != nil {
+ t.Error(err)
+ }
+ for fi, format := range []string{"%v", "%#v", "%+v"} {
+ expect := toPath(test[fi])
+ if got := fmt.Sprintf(format, complete); got != expect {
+ t.Errorf("printing completed %q as %q got %q expected %q [%+v]", text, format, got, expect, spn)
+ }
+ }
+ }
+ }
+}
+
+func toPath(value string) string {
+ if strings.HasPrefix(value, "file://") {
+ return value
+ }
+ return filepath.FromSlash(value)
+}
+
+type lines int
+
+func (l lines) ToPosition(offset int) (int, int, error) {
+ return (offset / int(l)) + 1, (offset % int(l)) + 1, nil
+}
+
+func (l lines) ToOffset(line, col int) (int, error) {
+ return (int(l) * (line - 1)) + (col - 1), nil
+}