universal-libc: fix strncmp tests

The specification for this function is that it returns a positive value,
zero, or negative value, not that it returns the difference between
ascii values.

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/c.zig b/lib/c.zig
index 9df1b3fb01..c08454a22c 100644
--- a/lib/c.zig
+++ b/lib/c.zig
@@ -298,10 +298,10 @@ fn strerror(errnum: c_int) callconv(.C) [*:0]const u8 {
 }
 
 test "strncmp" {
-    try std.testing.expect(strncmp("a", "b", 1) == -1);
-    try std.testing.expect(strncmp("a", "c", 1) == -2);
-    try std.testing.expect(strncmp("b", "a", 1) == 1);
-    try std.testing.expect(strncmp("\xff", "\x02", 1) == 253);
+    try std.testing.expect(strncmp("a", "b", 1) < 0);
+    try std.testing.expect(strncmp("a", "c", 1) < 0);
+    try std.testing.expect(strncmp("b", "a", 1) > 0);
+    try std.testing.expect(strncmp("\xff", "\x02", 1) > 0);
 }
 
 // TODO we should be able to put this directly in std/linux/x86_64.zig but