intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 33 insertions, 0 deletions

diff --git a/util/stream/printf_ut.cpp b/util/stream/printf_ut.cpp
new file mode 100644
index 00000000000..0eab1670625
--- /dev/null
+++ b/util/stream/printf_ut.cpp
@@ -0,0 +1,33 @@
+#include "null.h"
+#include "printf.h"
+#include "str.h"
+
+#include <util/generic/string.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+Y_UNIT_TEST_SUITE(TStreamPrintfTest) {
+    Y_UNIT_TEST(TestPrintf) {
+        TStringStream ss;
+
+        UNIT_ASSERT_EQUAL(Printf(ss, "qw %s %d", "er", 1), 7);
+        UNIT_ASSERT_EQUAL(ss.Str(), "qw er 1");
+    }
+
+#ifdef __GNUC__
+    #pragma GCC diagnostic ignored "-Wformat-zero-length"
+#endif // __GNUC__
+
+    Y_UNIT_TEST(TestZeroString) {
+        UNIT_ASSERT_EQUAL(Printf(Cnull, ""), 0);
+    }
+
+    Y_UNIT_TEST(TestLargePrintf) {
+        TString s = NUnitTest::RandomString(1000000);
+        TStringStream ss;
+
+        Printf(ss, "%s", s.data());
+
+        UNIT_ASSERT_EQUAL(ss.Str(), s);
+    }
+}