public void testStatsCalculation() {
PerformanceTracker tracker = new PerformanceTracker(emptyScript, TracerMode.ALL, null);
CodeChangeHandler handler = tracker.getCodeChangeHandler();
// It's sufficient for this test to assume that a single run of any pass
// takes some fixed amount of time, say 5ms.
int passRuntime = 5;
tracker.recordPassStart("noloopA", true);
handler.reportChange();
tracker.recordPassStop("noloopA", passRuntime);
tracker.recordPassStart("noloopB", true);
handler.reportChange();
tracker.recordPassStop("noloopB", passRuntime);
tracker.recordPassStart("loopA", false);
handler.reportChange();
tracker.recordPassStop("loopA", passRuntime);
tracker.recordPassStart("loopA", false);
tracker.recordPassStop("loopA", passRuntime);
tracker.recordPassStart("noloopB", true);
handler.reportChange();
tracker.recordPassStop("noloopB", passRuntime);
tracker.recordPassStart("loopB", false);
tracker.recordPassStop("loopB", passRuntime);
tracker.recordPassStart("noloopB", true);
tracker.recordPassStop("noloopB", passRuntime);
int numRuns = tracker.getRuns();
assertEquals(numRuns, 7);
assertEquals(tracker.getRuntime(), numRuns * passRuntime);
assertEquals(tracker.getLoopRuns(), 3);
assertEquals(tracker.getChanges(), 4); /* reportChange was called 4 times */
assertEquals(tracker.getLoopChanges(), 1);
ImmutableMap<String, Stats> stats = tracker.getStats();
Stats st = stats.get("noloopA");
assertEquals(st.runs, 1);
assertEquals(st.runtime, passRuntime);
assertEquals(st.changes, 1);
st = stats.get("noloopB");
assertEquals(st.runs, 3);
assertEquals(st.runtime, 3 * passRuntime);
assertEquals(st.changes, 2);
st = stats.get("loopA");
assertEquals(st.runs, 2);
assertEquals(st.runtime, 2 * passRuntime);
assertEquals(st.changes, 1);
st = stats.get("loopB");
assertEquals(st.runs, 1);
assertEquals(st.runtime, passRuntime);
assertEquals(st.changes, 0);
}
