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-rw-r--r--test/fixedbugs/issue24817.go64
1 files changed, 64 insertions, 0 deletions
diff --git a/test/fixedbugs/issue24817.go b/test/fixedbugs/issue24817.go
new file mode 100644
index 0000000..ba2a138
--- /dev/null
+++ b/test/fixedbugs/issue24817.go
@@ -0,0 +1,64 @@
+// run
+
+// 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.
+
+// Check all ways to compare a non-constant string to the empty string.
+
+package main
+
+import (
+ "fmt"
+ "os"
+)
+
+var (
+ s = "abc"
+ e = ""
+ failed bool
+)
+
+func main() {
+ want(true, "" < s, `"" < s`)
+ want(false, s < "", `s < ""`)
+ want(false, "" < e, `"" < e`)
+ want(false, e < "", `e < ""`)
+
+ want(true, "" <= s, `"" <= s`)
+ want(false, s <= "", `s <= ""`)
+ want(true, "" <= e, `"" <= e`)
+ want(true, e <= "", `e <= ""`)
+
+ want(false, "" > s, `"" > s`)
+ want(true, s > "", `s > ""`)
+ want(false, "" > e, `"" > e`)
+ want(false, e > "", `e > ""`)
+
+ want(false, "" >= s, `"" >= s`)
+ want(true, s >= "", `s >= ""`)
+ want(true, "" >= e, `"" >= e`)
+ want(true, e >= "", `e >= ""`)
+
+ want(false, "" == s, `"" == s`)
+ want(false, s == "", `s == ""`)
+ want(true, "" == e, `"" == e`)
+ want(true, e == "", `e == ""`)
+
+ want(true, "" != s, `"" != s`)
+ want(true, s != "", `s != ""`)
+ want(false, "" != e, `"" != e`)
+ want(false, e != "", `e != ""`)
+
+ if failed {
+ os.Exit(1)
+ }
+}
+
+//go:noinline
+func want(b bool, have bool, msg string) {
+ if b != have {
+ fmt.Println(msg)
+ failed = true
+ }
+}