Add value site truncation unit test

[oota-llvm.git] / unittests / Support / TimeValueTest.cpp

diff --git a/unittests/Support/TimeValueTest.cpp b/unittests/Support/TimeValueTest.cpp
index 0fd567501517f0bd908e689c00a43dd374af2e4c..3d2b9780c069d3a7dbbe1373881d70a16306917c 100644 (file)
--- a/unittests/Support/TimeValueTest.cpp
+++ b/unittests/Support/TimeValueTest.cpp
@@ -16,8 +16,25 @@ namespace {
 
 TEST(TimeValue, time_t) {
   sys::TimeValue now = sys::TimeValue::now();
-  time_t now_t = time(NULL);
-  EXPECT_TRUE(abs(static_cast<long>(now_t - now.toEpochTime())) < 2);
+  time_t now_t = time(nullptr);
+  EXPECT_TRUE(std::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(0u, epoch.toEpochTime());
+  EXPECT_EQ(ns, static_cast<uint32_t>(epoch.nanoseconds()));
+
+  // Confirm it reversible.
+  EXPECT_EQ(ft1970, epoch.toWin32Time());
 }
 
 }