1 files changed, 22 insertions, 0 deletions
diff --git a/libgo/go/strconv/atof_test.go b/libgo/go/strconv/atof_test.go
index abe6c64..545d989 100644
--- a/libgo/go/strconv/atof_test.go
+++ b/libgo/go/strconv/atof_test.go
@@ -479,6 +479,28 @@ func initAtofOnce() {
 	}
 }
 
+func TestParseFloatPrefix(t *testing.T) {
+	for i := range atoftests {
+		test := &atoftests[i]
+		if test.err != nil {
+			continue
+		}
+		// Adding characters that do not extend a number should not invalidate it.
+		// Test a few. The "i" and "init" cases test that we accept "infi", "infinit"
+		// correctly as "inf" with suffix.
+		for _, suffix := range []string{" ", "q", "+", "-", "<", "=", ">", "(", ")", "i", "init"} {
+			in := test.in + suffix
+			_, n, err := ParseFloatPrefix(in, 64)
+			if err != nil {
+				t.Errorf("ParseFloatPrefix(%q, 64): err = %v; want no error", in, err)
+			}
+			if n != len(test.in) {
+				t.Errorf("ParseFloatPrefix(%q, 64): n = %d; want %d", in, n, len(test.in))
+			}
+		}
+	}
+}
+
 func testAtof(t *testing.T, opt bool) {
 	initAtof()
 	oldopt := SetOptimize(opt)