intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 28 insertions, 0 deletions

diff --git a/library/cpp/iterator/ut/zip_ut.cpp b/library/cpp/iterator/ut/zip_ut.cpp
new file mode 100644
index 0000000000..68d496515c
--- /dev/null
+++ b/library/cpp/iterator/ut/zip_ut.cpp
@@ -0,0 +1,28 @@
+#include <library/cpp/iterator/zip.h>
+
+#include <library/cpp/testing/gtest/gtest.h>
+
+#include <util/generic/vector.h>
+
+TEST(TIterator, ZipSimplePostIncrement) {
+    TVector<int> left{1, 2, 3};
+    TVector<int> right{4, 5, 6};
+
+    auto zipped = Zip(left, right);
+    auto cur = zipped.begin();
+    auto last = zipped.end();
+
+    {
+        auto first = *(cur++);
+        EXPECT_EQ(std::get<0>(first), 1);
+        EXPECT_EQ(std::get<1>(first), 4);
+    }
+    {
+        auto second = *(cur++);
+        EXPECT_EQ(std::get<0>(second), 2);
+        EXPECT_EQ(std::get<1>(second), 5);
+    }
+
+    EXPECT_EQ(std::next(cur), last);
+}
+