From d75320daf6941ffcb09a0aff494dd38576f487d7 Mon Sep 17 00:00:00 2001
From: Eyal Rozenberg <eyalroz1@gmx.com>
Date: Mon, 2 Aug 2021 17:49:17 +0300
Subject: [PATCH] Added checks for printing extremal values of the various
 signed and unsigned integer types; regards issue mpaland/printf#118.

---
 test/test_suite.cpp | 49 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/test/test_suite.cpp b/test/test_suite.cpp
index 85848775..2bd089f0 100644
--- a/test/test_suite.cpp
+++ b/test/test_suite.cpp
@@ -33,7 +33,7 @@
 #include <string.h>
 #include <sstream>
 #include <math.h>
-
+#include <limits>
 
 namespace test {
   // use functions in own test namespace to avoid stdio conflicts
@@ -1055,6 +1055,53 @@ TEST_CASE("misc", "[]" ) {
 #endif
 }
 
+TEST_CASE("extremal signed integer values", "[]" ) {
+  char buffer[100];
+  char expected[100];
+
+  std::sprintf(expected, "%hd", std::numeric_limits<short int>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%hd", std::numeric_limits<short int>::max());
+
+  std::sprintf(expected, "%hd", std::numeric_limits<short int>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%hd", std::numeric_limits<short int>::max());
+
+  std::sprintf(expected, "%d", std::numeric_limits<int>::min());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%d", std::numeric_limits<int>::min());
+
+  std::sprintf(expected, "%d", std::numeric_limits<int>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%d", std::numeric_limits<int>::max());
+
+  std::sprintf(expected, "%ld", std::numeric_limits<long int>::min());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%ld", std::numeric_limits<long int>::min());
+
+  std::sprintf(expected, "%ld", std::numeric_limits<long int>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%ld", std::numeric_limits<long int>::max());
+
+  std::sprintf(expected, "%lld", std::numeric_limits<long long int>::min());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%lld", std::numeric_limits<long long int>::min());
+
+  std::sprintf(expected, "%lld", std::numeric_limits<long long int>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%lld", std::numeric_limits<long long int>::max());
+}
+
+TEST_CASE("extremal unsigned integer values", "[]" ) {
+  char buffer[100];
+  char expected[100];
+
+  std::sprintf(expected, "%hu", std::numeric_limits<short unsigned>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%hu", std::numeric_limits<short unsigned>::max());
+
+  std::sprintf(expected, "%u", std::numeric_limits<unsigned>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%u", std::numeric_limits<unsigned>::max());
+
+  std::sprintf(expected, "%lu", std::numeric_limits<long unsigned>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%lu", std::numeric_limits<long unsigned>::max());
+
+  std::sprintf(expected, "%llu", std::numeric_limits<long long unsigned>::max());
+  PRINTING_CHECK(expected, ==, test::sprintf_, buffer, "%llu", std::numeric_limits<long long unsigned>::max());
+}
+
+
 #ifdef TEST_WITH_NON_STANDARD_FORMAT_STRINGS
 DISABLE_WARNING_POP
 #endif