From 845ed472315e5e4ac6960d809ee03ad841fa14ec Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 14 Mar 2022 12:02:42 +0100
Subject: [PATCH] test: add test for DECIMAL_STR_WIDTH()

---
 src/test/test-macro.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/test/test-macro.c b/src/test/test-macro.c
index 24411f10a52..84b0af68706 100644
--- a/src/test/test-macro.c
+++ b/src/test/test-macro.c
@@ -387,4 +387,27 @@ TEST(flags) {
         assert_se(f == F2);
 }
 
+TEST(DECIMAL_STR_WIDTH) {
+        assert_se(DECIMAL_STR_WIDTH(0) == 1);
+        assert_se(DECIMAL_STR_WIDTH(1) == 1);
+        assert_se(DECIMAL_STR_WIDTH(2) == 1);
+        assert_se(DECIMAL_STR_WIDTH(9) == 1);
+        assert_se(DECIMAL_STR_WIDTH(10) == 2);
+        assert_se(DECIMAL_STR_WIDTH(11) == 2);
+        assert_se(DECIMAL_STR_WIDTH(99) == 2);
+        assert_se(DECIMAL_STR_WIDTH(100) == 3);
+        assert_se(DECIMAL_STR_WIDTH(101) == 3);
+        assert_se(DECIMAL_STR_WIDTH(-1) == 2);
+        assert_se(DECIMAL_STR_WIDTH(-2) == 2);
+        assert_se(DECIMAL_STR_WIDTH(-9) == 2);
+        assert_se(DECIMAL_STR_WIDTH(-10) == 3);
+        assert_se(DECIMAL_STR_WIDTH(-11) == 3);
+        assert_se(DECIMAL_STR_WIDTH(-99) == 3);
+        assert_se(DECIMAL_STR_WIDTH(-100) == 4);
+        assert_se(DECIMAL_STR_WIDTH(-101) == 4);
+        assert_se(DECIMAL_STR_WIDTH(UINT64_MAX) == STRLEN("18446744073709551615"));
+        assert_se(DECIMAL_STR_WIDTH(INT64_MAX) == STRLEN("9223372036854775807"));
+        assert_se(DECIMAL_STR_WIDTH(INT64_MIN) == STRLEN("-9223372036854775808"));
+}
+
 DEFINE_TEST_MAIN(LOG_INFO);