Add is:tentative command

api/query/atoms.go

@@ -262,6 +262,9 @@ const (
 	// MetadataQualityDifferent represents an is:different atom.
 	// "different" ensures that one or more results differs from the other results.
 	MetadataQualityDifferent MetadataQuality = 1
+	// MetadataQualityTentative represents an is:tentative atom.
+	// "tentative" ensures that the results are from a tentative test.
+	MetadataQualityTentative MetadataQuality = 2
 )
 
 // BindToRuns for MetadataQuality is a no-op; it is independent of test runs.
@@ -902,6 +905,8 @@ func MetadataQualityFromString(quality string) (MetadataQuality, error) {
 	switch quality {
 	case "different":
 		return MetadataQualityDifferent, nil
+	case "tentative":
+		return MetadataQualityTentative, nil
 	}
 	return MetadataQualityUnknown, fmt.Errorf(`Unknown "is" quality "%s"`, quality)
 }

api/query/cache/index/filter.go

@@ -305,11 +305,28 @@ func (l Link) Filter(t TestID) bool {
 
 // Filter interprets a MetadataQuality as a filter function over TestIDs.
 func (q MetadataQuality) Filter(t TestID) bool {
-	set := mapset.NewSet()
-	for _, result := range q.runResults {
-		set.Add(result.GetResult(t))
+	switch (q.quality) {
+	case query.MetadataQualityDifferent:
+		// is:different only returns subtest rows where the result
+		// differs between the runs we are comparing. To detect this,
+		// put them into a set and then check the size.
+		set := mapset.NewSet()
+		for _, result := range q.runResults {
+			set.Add(result.GetResult(t))
+		}
+		return set.Cardinality() > 1
+	case query.MetadataQualityTentative:
+		// is:tentative only returns rows from tests with .tentative.
+		// in their name. See
+		// https://web-platform-tests.org/writing-tests/file-names.html
+		name, subtest, err := q.tests.GetName(t)
+		if (err != nil) {
+			return false
+		}
+		return strings.Contains(name, ".tentative.")
+	default:
+		return false
 	}
-	return set.Cardinality() > 1
 }
 
 // Filter interprets an And as a filter function over TestIDs.

api/query/cache/service/.gitignore

@@ -0,0 +1,2 @@
+# The binary for the searchcache service
+service

webapp/components/test-search.js

@@ -145,6 +145,7 @@ const QUERY_GRAMMAR = ohm.grammar(`
 
     metadataQualityLiteral
       = caseInsensitive<"different">
+      | caseInsensitive<"tentative">
 
     nameFragment
       = basicNameFragment                       -- basic