var initialStart highPrecisionTime

var firstStart highPrecisionTime

var lastStart highPrecisionTime

var runningEnd bool

runs := 0

iters := 0

finalBN := 0

bRet := Benchmark(func(b *B) {

initialStart = b.start

runs++

for b.Loop() {

if iters == 0 {

firstStart = b.start

}

lastStart = b.start

iters++

}

finalBN = b.N

runningEnd = b.timerOn

})

// Verify that a b.Loop benchmark is invoked just once.

if runs != 1 {

t.Errorf("want runs == 1, got %d", runs)

}

// Verify that at least one iteration ran.

if iters == 0 {

t.Fatalf("no iterations ran")

}

// Verify that b.N, bRet.N, and the b.Loop() iteration count match.

if finalBN != iters || bRet.N != iters {

t.Errorf("benchmark iterations mismatch: %d loop iterations, final b.N=%d, bRet.N=%d", iters, finalBN, bRet.N)

}

// Make sure the benchmark ran for an appropriate amount of time.

if bRet.T < benchTime.d {

t.Fatalf("benchmark ran for %s, want >= %s", bRet.T, benchTime.d)

}

// Verify that the timer is reset on the first loop, and then left alone.

if firstStart == initialStart {

t.Errorf("b.Loop did not reset the timer")

}

if lastStart != firstStart {

t.Errorf("timer was reset during iteration")

}

// Verify that it stopped the timer after the last loop.

if runningEnd {

t.Errorf("timer was still running after last iteration")

}