intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 30 insertions, 0 deletions

diff --git a/util/string/printf_ut.cpp b/util/string/printf_ut.cpp
new file mode 100644
index 00000000000..2b2f980b70e
--- /dev/null
+++ b/util/string/printf_ut.cpp
@@ -0,0 +1,30 @@
+#include "printf.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+Y_UNIT_TEST_SUITE(TStringPrintf) {
+    Y_UNIT_TEST(TestSprintf) {
+        TString s;
+        int len = sprintf(s, "Hello %s", "world");
+        UNIT_ASSERT_EQUAL(s, TString("Hello world"));
+        UNIT_ASSERT_EQUAL(len, 11);
+    }
+
+    Y_UNIT_TEST(TestFcat) {
+        TString s;
+        int len = sprintf(s, "Hello %s", "world");
+        UNIT_ASSERT_EQUAL(s, TString("Hello world"));
+        UNIT_ASSERT_EQUAL(len, 11);
+        len = fcat(s, " qwqw%s", "as");
+        UNIT_ASSERT_EQUAL(s, TString("Hello world qwqwas"));
+        UNIT_ASSERT_EQUAL(len, 7);
+    }
+
+    Y_UNIT_TEST(TestSpecial) {
+        UNIT_ASSERT_EQUAL("4294967295", Sprintf("%" PRIu32, (ui32)(-1)));
+    }
+
+    Y_UNIT_TEST(TestExplicitPositions) {
+        UNIT_ASSERT_EQUAL("abc xyz abc", Sprintf("%1$s %2$s %1$s", "abc", "xyz"));
+    }
+}