TEST(UseCounterTest, RecordingCSSProperties) {
UseCounter useCounter;
HistogramTester histogramTester;
// Test recording a single (arbitrary) property
EXPECT_FALSE(useCounter.isCounted(CSSPropertyFont));
useCounter.count(HTMLStandardMode, CSSPropertyFont);
EXPECT_TRUE(useCounter.isCounted(CSSPropertyFont));
histogramTester.expectUniqueSample(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyFont),
1);
histogramTester.expectTotalCount(kLegacyCSSHistogramName, 0);
// Test that repeated measurements have no effect
useCounter.count(HTMLStandardMode, CSSPropertyFont);
histogramTester.expectUniqueSample(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyFont),
1);
histogramTester.expectTotalCount(kLegacyCSSHistogramName, 0);
// Test recording a different sample
EXPECT_FALSE(useCounter.isCounted(CSSPropertyZoom));
useCounter.count(HTMLStandardMode, CSSPropertyZoom);
EXPECT_TRUE(useCounter.isCounted(CSSPropertyZoom));
histogramTester.expectBucketCount(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyFont),
1);
histogramTester.expectBucketCount(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyZoom),
1);
histogramTester.expectTotalCount(kCSSHistogramName, 2);
histogramTester.expectTotalCount(kLegacyCSSHistogramName, 0);
// Test the impact of page load on the new histogram
useCounter.didCommitLoad();
histogramTester.expectBucketCount(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyFont),
1);
histogramTester.expectBucketCount(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyZoom),
1);
histogramTester.expectBucketCount(kCSSHistogramName, 1, 1);
histogramTester.expectTotalCount(kCSSHistogramName, 3);
// And verify the legacy histogram now looks the same
histogramTester.expectBucketCount(
kLegacyCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyFont),
1);
histogramTester.expectBucketCount(
kLegacyCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyZoom),
1);
histogramTester.expectBucketCount(kLegacyCSSHistogramName, 1, 1);
histogramTester.expectTotalCount(kLegacyCSSHistogramName, 3);
// Now a repeat measurement should get recorded again, exactly once
EXPECT_FALSE(useCounter.isCounted(CSSPropertyFont));
useCounter.count(HTMLStandardMode, CSSPropertyFont);
useCounter.count(HTMLStandardMode, CSSPropertyFont);
EXPECT_TRUE(useCounter.isCounted(CSSPropertyFont));
histogramTester.expectBucketCount(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyFont),
2);
histogramTester.expectTotalCount(kCSSHistogramName, 4);
// And on the next page load, the legacy histogram will again be updated
useCounter.didCommitLoad();
histogramTester.expectBucketCount(
kLegacyCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyFont),
2);
histogramTester.expectBucketCount(
kLegacyCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(CSSPropertyZoom),
1);
histogramTester.expectBucketCount(kLegacyCSSHistogramName, 1, 2);
histogramTester.expectTotalCount(kLegacyCSSHistogramName, 5);
// None of this should update any of the SVG histograms
histogramTester.expectTotalCount(kSVGFeaturesHistogramName, 0);
histogramTester.expectTotalCount(kSVGCSSHistogramName, 0);
}
TEST(UseCounterTest, RecordingFeatures) {
UseCounter useCounter;
HistogramTester histogramTester;
// Test recording a single (arbitrary) counter
EXPECT_FALSE(useCounter.hasRecordedMeasurement(UseCounter::Fetch));
useCounter.recordMeasurement(UseCounter::Fetch);
EXPECT_TRUE(useCounter.hasRecordedMeasurement(UseCounter::Fetch));
histogramTester.expectUniqueSample(kFeaturesHistogramName, UseCounter::Fetch,
1);
histogramTester.expectTotalCount(kLegacyFeaturesHistogramName, 0);
// Test that repeated measurements have no effect
useCounter.recordMeasurement(UseCounter::Fetch);
histogramTester.expectUniqueSample(kFeaturesHistogramName, UseCounter::Fetch,
1);
histogramTester.expectTotalCount(kLegacyFeaturesHistogramName, 0);
// Test recording a different sample
EXPECT_FALSE(useCounter.hasRecordedMeasurement(UseCounter::FetchBodyStream));
useCounter.recordMeasurement(UseCounter::FetchBodyStream);
EXPECT_TRUE(useCounter.hasRecordedMeasurement(UseCounter::FetchBodyStream));
histogramTester.expectBucketCount(kFeaturesHistogramName, UseCounter::Fetch,
1);
histogramTester.expectBucketCount(kFeaturesHistogramName,
UseCounter::FetchBodyStream, 1);
histogramTester.expectTotalCount(kFeaturesHistogramName, 2);
histogramTester.expectTotalCount(kLegacyFeaturesHistogramName, 0);
// Test the impact of page load on the new histogram
useCounter.didCommitLoad();
histogramTester.expectBucketCount(kFeaturesHistogramName, UseCounter::Fetch,
1);
histogramTester.expectBucketCount(kFeaturesHistogramName,
UseCounter::FetchBodyStream, 1);
histogramTester.expectBucketCount(kFeaturesHistogramName,
UseCounter::PageVisits, 1);
histogramTester.expectTotalCount(kFeaturesHistogramName, 3);
// And verify the legacy histogram now looks the same
histogramTester.expectBucketCount(kLegacyFeaturesHistogramName,
UseCounter::Fetch, 1);
histogramTester.expectBucketCount(kLegacyFeaturesHistogramName,
UseCounter::FetchBodyStream, 1);
histogramTester.expectBucketCount(kLegacyFeaturesHistogramName,
UseCounter::PageVisits, 1);
histogramTester.expectTotalCount(kLegacyFeaturesHistogramName, 3);
// Now a repeat measurement should get recorded again, exactly once
EXPECT_FALSE(useCounter.hasRecordedMeasurement(UseCounter::Fetch));
useCounter.recordMeasurement(UseCounter::Fetch);
useCounter.recordMeasurement(UseCounter::Fetch);
EXPECT_TRUE(useCounter.hasRecordedMeasurement(UseCounter::Fetch));
histogramTester.expectBucketCount(kFeaturesHistogramName, UseCounter::Fetch,
2);
histogramTester.expectTotalCount(kFeaturesHistogramName, 4);
// And on the next page load, the legacy histogram will again be updated
useCounter.didCommitLoad();
histogramTester.expectBucketCount(kLegacyFeaturesHistogramName,
UseCounter::Fetch, 2);
histogramTester.expectBucketCount(kLegacyFeaturesHistogramName,
UseCounter::FetchBodyStream, 1);
histogramTester.expectBucketCount(kLegacyFeaturesHistogramName,
UseCounter::PageVisits, 2);
histogramTester.expectTotalCount(kLegacyFeaturesHistogramName, 5);
// None of this should update any of the SVG histograms
histogramTester.expectTotalCount(kSVGFeaturesHistogramName, 0);
histogramTester.expectTotalCount(kSVGCSSHistogramName, 0);
}
void recordMeasurement(UseCounter& useCounter, UseCounter::Feature feature)
{
useCounter.recordMeasurement(feature);
}
TEST(UseCounterTest, InspectorDisablesMeasurement) {
UseCounter useCounter;
HistogramTester histogramTester;
// The specific feature we use here isn't important.
UseCounter::Feature feature = UseCounter::Feature::SVGSMILElementInDocument;
CSSPropertyID property = CSSPropertyFontWeight;
CSSParserMode parserMode = HTMLStandardMode;
EXPECT_FALSE(useCounter.hasRecordedMeasurement(feature));
useCounter.muteForInspector();
useCounter.recordMeasurement(feature);
EXPECT_FALSE(useCounter.hasRecordedMeasurement(feature));
useCounter.count(parserMode, property);
EXPECT_FALSE(useCounter.isCounted(property));
histogramTester.expectTotalCount(kFeaturesHistogramName, 0);
histogramTester.expectTotalCount(kCSSHistogramName, 0);
useCounter.muteForInspector();
useCounter.recordMeasurement(feature);
EXPECT_FALSE(useCounter.hasRecordedMeasurement(feature));
useCounter.count(parserMode, property);
EXPECT_FALSE(useCounter.isCounted(property));
histogramTester.expectTotalCount(kFeaturesHistogramName, 0);
histogramTester.expectTotalCount(kCSSHistogramName, 0);
useCounter.unmuteForInspector();
useCounter.recordMeasurement(feature);
EXPECT_FALSE(useCounter.hasRecordedMeasurement(feature));
useCounter.count(parserMode, property);
EXPECT_FALSE(useCounter.isCounted(property));
histogramTester.expectTotalCount(kFeaturesHistogramName, 0);
histogramTester.expectTotalCount(kCSSHistogramName, 0);
useCounter.unmuteForInspector();
useCounter.recordMeasurement(feature);
EXPECT_TRUE(useCounter.hasRecordedMeasurement(feature));
useCounter.count(parserMode, property);
EXPECT_TRUE(useCounter.isCounted(property));
histogramTester.expectUniqueSample(kFeaturesHistogramName, feature, 1);
histogramTester.expectUniqueSample(
kCSSHistogramName,
UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(property), 1);
}
bool hasRecordedMeasurement(const UseCounter& useCounter, UseCounter::Feature feature)
{
return useCounter.hasRecordedMeasurement(feature);
}
