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/* vim:set ts=2 sw=2 sts=0 et: */
/* Any copyright is dedicated to the Public Domain.
*/
#include "gtest/gtest.h"
#include "js/Conversions.h"
#include "mozilla/Telemetry.h"
#include "TelemetryFixture.h"
#include "TelemetryTestHelpers.h"
using namespace mozilla;
using namespace TelemetryTestHelpers;
TEST_F(TelemetryTestFixture, AutoCounter) {
const uint32_t kExpectedValue = 100;
AutoJSContextWithGlobal cx(mCleanGlobal);
const char* telemetryTestCountName =
Telemetry::GetHistogramName(Telemetry::TELEMETRY_TEST_COUNT);
GetAndClearHistogram(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_COUNT"_ns,
false);
// Accumulate in the histogram
{
Telemetry::AutoCounter<Telemetry::TELEMETRY_TEST_COUNT> autoCounter;
autoCounter += kExpectedValue / 2;
}
// This counter should not accumulate since it does not go out of scope
Telemetry::AutoCounter<Telemetry::TELEMETRY_TEST_COUNT> autoCounter;
autoCounter += kExpectedValue;
// Accumulate a second time in the histogram
{
Telemetry::AutoCounter<Telemetry::TELEMETRY_TEST_COUNT> autoCounter;
autoCounter += kExpectedValue / 2;
}
// Get a snapshot for all the histograms
JS::Rooted<JS::Value> snapshot(cx.GetJSContext());
GetSnapshots(cx.GetJSContext(), mTelemetry, telemetryTestCountName, &snapshot,
false);
// Get the histogram from the snapshot
JS::Rooted<JS::Value> histogram(cx.GetJSContext());
GetProperty(cx.GetJSContext(), telemetryTestCountName, snapshot, &histogram);
// Get "sum" property from histogram
JS::Rooted<JS::Value> sum(cx.GetJSContext());
GetProperty(cx.GetJSContext(), "sum", histogram, &sum);
// Check that the "sum" stored in the histogram matches with |kExpectedValue|
uint32_t uSum = 0;
JS::ToUint32(cx.GetJSContext(), sum, &uSum);
ASSERT_EQ(uSum, kExpectedValue)
<< "The histogram is not returning expected value";
}
TEST_F(TelemetryTestFixture, AutoCounterUnderflow) {
const uint32_t kExpectedValue = 0;
AutoJSContextWithGlobal cx(mCleanGlobal);
const char* telemetryTestCountName =
Telemetry::GetHistogramName(Telemetry::TELEMETRY_TEST_COUNT);
GetAndClearHistogram(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_COUNT"_ns,
false);
// Accumulate in the histogram
{
Telemetry::AutoCounter<Telemetry::TELEMETRY_TEST_COUNT> autoCounter;
autoCounter += -1;
}
// Get a snapshot for all the histograms
JS::Rooted<JS::Value> snapshot(cx.GetJSContext());
GetSnapshots(cx.GetJSContext(), mTelemetry, telemetryTestCountName, &snapshot,
false);
// Get the histogram from the snapshot
JS::Rooted<JS::Value> histogram(cx.GetJSContext());
GetProperty(cx.GetJSContext(), telemetryTestCountName, snapshot, &histogram);
// Get "sum" property from histogram
JS::Rooted<JS::Value> sum(cx.GetJSContext());
GetProperty(cx.GetJSContext(), "sum", histogram, &sum);
// Check that the "sum" stored in the histogram matches with |kExpectedValue|
uint32_t uSum = 42;
JS::ToUint32(cx.GetJSContext(), sum, &uSum);
ASSERT_EQ(uSum, kExpectedValue)
<< "The histogram is supposed to return 0 when an underflow occurs.";
}
TEST_F(TelemetryTestFixture, RuntimeAutoCounter) {
const uint32_t kExpectedValue = 100;
AutoJSContextWithGlobal cx(mCleanGlobal);
const char* telemetryTestCountName =
Telemetry::GetHistogramName(Telemetry::TELEMETRY_TEST_COUNT);
GetAndClearHistogram(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_COUNT"_ns,
false);
// Accumulate in the histogram
{
Telemetry::RuntimeAutoCounter autoCounter(Telemetry::TELEMETRY_TEST_COUNT);
autoCounter += kExpectedValue / 2;
}
// This counter should not accumulate since it does not go out of scope
Telemetry::RuntimeAutoCounter autoCounter(Telemetry::TELEMETRY_TEST_COUNT);
autoCounter += kExpectedValue;
// Accumulate a second time in the histogram
{
Telemetry::RuntimeAutoCounter autoCounter(Telemetry::TELEMETRY_TEST_COUNT);
autoCounter += kExpectedValue / 2;
}
// Get a snapshot for all the histograms
JS::Rooted<JS::Value> snapshot(cx.GetJSContext());
GetSnapshots(cx.GetJSContext(), mTelemetry, telemetryTestCountName, &snapshot,
false);
// Get the histogram from the snapshot
JS::Rooted<JS::Value> histogram(cx.GetJSContext());
GetProperty(cx.GetJSContext(), telemetryTestCountName, snapshot, &histogram);
// Get "sum" property from histogram
JS::Rooted<JS::Value> sum(cx.GetJSContext());
GetProperty(cx.GetJSContext(), "sum", histogram, &sum);
// Check that the "sum" stored in the histogram matches with |kExpectedValue|
uint32_t uSum = 0;
JS::ToUint32(cx.GetJSContext(), sum, &uSum);
ASSERT_EQ(uSum, kExpectedValue)
<< "The histogram is not returning expected value";
}
TEST_F(TelemetryTestFixture, RuntimeAutoCounterUnderflow) {
const uint32_t kExpectedValue = 0;
AutoJSContextWithGlobal cx(mCleanGlobal);
const char* telemetryTestCountName =
Telemetry::GetHistogramName(Telemetry::TELEMETRY_TEST_COUNT);
GetAndClearHistogram(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_COUNT"_ns,
false);
// Accumulate in the histogram
{
Telemetry::RuntimeAutoCounter autoCounter(Telemetry::TELEMETRY_TEST_COUNT,
kExpectedValue);
autoCounter += -1;
}
// Get a snapshot for all the histograms
JS::Rooted<JS::Value> snapshot(cx.GetJSContext());
GetSnapshots(cx.GetJSContext(), mTelemetry, telemetryTestCountName, &snapshot,
false);
// Get the histogram from the snapshot
JS::Rooted<JS::Value> histogram(cx.GetJSContext());
GetProperty(cx.GetJSContext(), telemetryTestCountName, snapshot, &histogram);
// Get "sum" property from histogram
JS::Rooted<JS::Value> sum(cx.GetJSContext());
GetProperty(cx.GetJSContext(), "sum", histogram, &sum);
// Check that the "sum" stored in the histogram matches with |kExpectedValue|
uint32_t uSum = 42;
JS::ToUint32(cx.GetJSContext(), sum, &uSum);
ASSERT_EQ(uSum, kExpectedValue)
<< "The histogram is supposed to return 0 when an underflow occurs.";
}