1 files changed, 70 insertions, 0 deletions
diff --git a/test/nxt_sprintf_unit_test.c b/test/nxt_sprintf_unit_test.c
new file mode 100644
index 00000000..02434791
--- /dev/null
+++ b/test/nxt_sprintf_unit_test.c
@@ -0,0 +1,70 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+typedef struct {
+    const char  *format;
+    const char  *test;
+    double       number;
+} nxt_sprintf_double_test_t;
+
+
+static const nxt_sprintf_double_test_t  double_test[] =
+{
+    { "%3.5f", "1234.56700", 1234.567 },
+    { "%3.0f", "1234", 1234.567 },
+    { "%f", "1234.567", 1234.567 },
+    { "%f", "0.1", 0.1 },
+    { "%f", "0.000001", 0.000001 },
+    { "%f", "4503599627370495", 4503599627370495.0 },
+};
+
+
+static nxt_int_t
+nxt_sprintf_test_double(u_char *buf, u_char *end, const char *fmt,
+    const char *test, double n)
+{
+    u_char  *p;
+
+    p = nxt_sprintf(buf, end, fmt, n);
+    *p = '\0';
+
+    return nxt_strcmp(buf, test);
+}
+
+
+nxt_int_t
+nxt_sprintf_unit_test(nxt_thread_t *thr)
+{
+    nxt_int_t   ret;
+    nxt_uint_t  i;
+    u_char      *end, buf[64];
+
+    nxt_thread_time_update(thr);
+
+    end = buf + 64;
+
+    for (i = 0; i < nxt_nitems(double_test); i++) {
+
+        ret = nxt_sprintf_test_double(buf, end, double_test[i].format,
+                                      double_test[i].test,
+                                      double_test[i].number);
+
+        if (ret == NXT_OK) {
+            continue;
+        }
+
+        nxt_log_alert(thr->log, "nxt_sprintf(\"%s\") failed: \"%s\" vs \"%s\"",
+                      double_test[i].format, double_test[i].test, buf);
+
+        return NXT_ERROR;
+    }
+
+    nxt_log_error(NXT_LOG_NOTICE, thr->log, "nxt_sprintf() unit test passed");
+    return NXT_OK;
+}