Zebediah Figura : quartz/tests: Check that system clock measurements are in sequence instead of comparing absolute time.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ff231dad75dd9e9dccba52ec41e1a5eb879b9cdc
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=ff231dad75dd9e9dccba52ec4...

Author: Zebediah Figura <zfigura(a)codeweavers.com>
Date:   Mon Jul 19 22:25:26 2021 -0500

quartz/tests: Check that system clock measurements are in sequence instead of comparing absolute time.

Signed-off-by: Zebediah Figura <zfigura(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/quartz/tests/systemclock.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/dlls/quartz/tests/systemclock.c b/dlls/quartz/tests/systemclock.c
index f13e89abedb..fa9464429f0 100644
--- a/dlls/quartz/tests/systemclock.c
+++ b/dlls/quartz/tests/systemclock.c
@@ -24,12 +24,6 @@
 
 static ULONGLONG (WINAPI *pGetTickCount64)(void);
 
-static BOOL compare_time(REFERENCE_TIME x, REFERENCE_TIME y, unsigned int max_diff)
-{
-    REFERENCE_TIME diff = x > y ? x - y : y - x;
-    return diff <= max_diff;
-}
-
 static IReferenceClock *create_system_clock(void)
 {
     IReferenceClock *clock = NULL;
@@ -172,7 +166,7 @@ static void test_aggregation(void)
 static void test_get_time(void)
 {
     IReferenceClock *clock = create_system_clock();
-    REFERENCE_TIME time1, time2;
+    REFERENCE_TIME time1, ticks, time2;
     HRESULT hr;
     ULONG ref;
 
@@ -180,18 +174,21 @@ static void test_get_time(void)
     ok(hr == E_POINTER, "Got hr %#x.\n", hr);
 
     hr = IReferenceClock_GetTime(clock, &time1);
-    if (pGetTickCount64)
-        time2 = pGetTickCount64() * 10000;
-    else
-        time2 = (REFERENCE_TIME)GetTickCount() * 10000;
     ok(hr == S_OK, "Got hr %#x.\n", hr);
     ok(time1 % 10000 == 0, "Expected no less than 1ms coarseness, but got time %s.\n",
             wine_dbgstr_longlong(time1));
-    ok(compare_time(time1, time2, 20 * 10000), "Expected about %s, got %s.\n",
-            wine_dbgstr_longlong(time2), wine_dbgstr_longlong(time1));
+
+    if (pGetTickCount64)
+        ticks = pGetTickCount64() * 10000;
+    else
+        ticks = (REFERENCE_TIME)GetTickCount() * 10000;
 
     hr = IReferenceClock_GetTime(clock, &time2);
     ok(hr == (time2 == time1 ? S_FALSE : S_OK), "Got hr %#x.\n", hr);
+    ok(time2 % 10000 == 0, "Expected no less than 1ms coarseness, but got time %s.\n",
+            wine_dbgstr_longlong(time1));
+
+    ok(time2 >= ticks && ticks >= time1, "Got timestamps %I64d, %I64d, %I64d.\n", time1, ticks, time2);
 
     Sleep(100);
     hr = IReferenceClock_GetTime(clock, &time2);