[llvm] r186375 - unittests/Support: Add TimeValue.Win32FILETIME, corresponding to r186374.

[NAKAMURA Takumi]

Author: chapuni
Date: Mon Jul 15 21:44:23 2013
New Revision: 186375

URL: http://llvm.org/viewvc/llvm-project?rev=186375&view=rev
Log:
unittests/Support: Add TimeValue.Win32FILETIME, corresponding to r186374.

Modified:
    llvm/trunk/unittests/Support/TimeValueTest.cpp

Modified: llvm/trunk/unittests/Support/TimeValueTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/Support/TimeValueTest.cpp?rev=186375&r1=186374&r2=186375&view=diff
==============================================================================
--- llvm/trunk/unittests/Support/TimeValueTest.cpp (original)
+++ llvm/trunk/unittests/Support/TimeValueTest.cpp Mon Jul 15 21:44:23 2013
@@ -20,4 +20,20 @@ TEST(TimeValue, time_t) {
   EXPECT_TRUE(abs(static_cast<long>(now_t - now.toEpochTime())) < 2);
 }
 
+TEST(TimeValue, Win32FILETIME) {
+  uint64_t epoch_as_filetime = 0x19DB1DED53E8000ULL;
+  uint32_t ns = 765432100;
+  sys::TimeValue epoch;
+
+  // FILETIME has 100ns of intervals.
+  uint64_t ft1970 = epoch_as_filetime + ns / 100;
+  epoch.fromWin32Time(ft1970);
+
+  // The "seconds" part in Posix time may be expected as zero.
+  EXPECT_EQ(ns / 100, epoch.toPosixTime());
+
+  // Confirm it reversible.
+  EXPECT_EQ(ft1970, epoch.toWin32Time());
+}
+
 }