Conservatively trim data usage stats.
Instead of trusting NTP time alone, use the most-conservative of
system clock and NTP.
Bug: 5584564
Change-Id: I5dd87fc009959b1cf0a7d660e385a0b1a8be238b
diff --git a/core/tests/coretests/src/android/net/NetworkStatsHistoryTest.java b/core/tests/coretests/src/android/net/NetworkStatsHistoryTest.java
index e1db073..1df763a 100644
--- a/core/tests/coretests/src/android/net/NetworkStatsHistoryTest.java
+++ b/core/tests/coretests/src/android/net/NetworkStatsHistoryTest.java
@@ -256,6 +256,10 @@
stats.recordData(TEST_START, TEST_START + DAY_IN_MILLIS, 24L, 24L);
assertEquals(24, stats.size());
+ // try removing invalid data; should be no change
+ stats.removeBucketsBefore(0 - DAY_IN_MILLIS);
+ assertEquals(24, stats.size());
+
// try removing far before buckets; should be no change
stats.removeBucketsBefore(TEST_START - YEAR_IN_MILLIS);
assertEquals(24, stats.size());