intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 74 insertions, 0 deletions

diff --git a/util/stream/file_ut.cpp b/util/stream/file_ut.cpp
new file mode 100644
index 0000000000..ac0f09796e
--- /dev/null
+++ b/util/stream/file_ut.cpp
@@ -0,0 +1,74 @@
+#include "file.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/system/tempfile.h>
+
+static const char* TmpFileName = "./fileio";
+static const char* TmpFileContents = "To do good to Mankind is the chivalrous plan";
+static const char* TmpFileSubstring = strstr(TmpFileContents, "chivalrous");
+
+Y_UNIT_TEST_SUITE(TFileTest) {
+    Y_UNIT_TEST(InputTest) {
+        TTempFile tmp(TmpFileName);
+
+        {
+            TUnbufferedFileOutput output(TmpFileName);
+            output.Write(TmpFileContents, strlen(TmpFileContents));
+        }
+
+        {
+            TUnbufferedFileInput input(TmpFileName);
+            TString s = input.ReadAll();
+            UNIT_ASSERT_VALUES_EQUAL(s, TmpFileContents);
+        }
+
+        {
+            TUnbufferedFileInput input(TmpFileName);
+            input.Skip(TmpFileSubstring - TmpFileContents);
+            TString s = input.ReadAll();
+            UNIT_ASSERT_VALUES_EQUAL(s, "chivalrous plan");
+        }
+
+        {
+            TUnbufferedFileOutput output(TFile::ForAppend(TmpFileName));
+            output.Write(TmpFileContents, strlen(TmpFileContents));
+        }
+
+        {
+            TUnbufferedFileInput input(TmpFileName);
+            TString s = input.ReadAll();
+            UNIT_ASSERT_VALUES_EQUAL(s, TString::Join(TmpFileContents, TmpFileContents));
+        }
+    }
+
+    Y_UNIT_TEST(EmptyMapTest) {
+        TTempFile tmp(TmpFileName);
+
+        {
+            TUnbufferedFileOutput output(TmpFileName);
+            /* Write nothing. */
+        }
+
+        {
+            TMappedFileInput input(TmpFileName);
+            TString s = input.ReadAll();
+            UNIT_ASSERT(s.empty());
+        }
+    }
+
+#ifdef _unix_
+    Y_UNIT_TEST(PipeReadLineTest) {
+        int fds[2];
+        UNIT_ASSERT(pipe(fds) == 0);
+        TFile readEnd(fds[0]);
+        TFileInput fileInput(readEnd);
+        UNIT_ASSERT_VALUES_EQUAL(write(fds[1], "hello\n", 6), 6);
+
+        TString line;
+        UNIT_ASSERT(fileInput.ReadLine(line));
+        UNIT_ASSERT_STRINGS_EQUAL(line, "hello");
+        close(fds[1]);
+    }
+#endif
+}