🐛 fix wildcard values in labels

Signed-off-by: Pranav Gaikwad <[email protected]>

engine/labels/labels.go

@@ -251,6 +251,10 @@ func matchesAny(elem string, items []string) bool {
 // returns true when names of values are equal and the version of
 // candidate falls within the version range of matchWith
 func labelValueMatches(matchWith string, candidate string) bool {
+	// empty value treated as wildcard
+	if matchWith == "" {
+		return true
+	}
 	versionRegex := regexp.MustCompile(`(\d(?:[\d\.]*\d)?)([\+-])?$`)
 	mMatch := versionRegex.FindStringSubmatch(matchWith)
 	cMatch := versionRegex.FindStringSubmatch(candidate)

engine/labels/labels_test.go

@@ -360,6 +360,23 @@ func Test_ruleSelector_Matches(t *testing.T) {
 			},
 			want: true,
 		},
+		{
+			name: "simple wildcard value",
+			expr: "(konveyor.io/source=technology-usage)",
+			ruleLabels: []string{
+				"konveyor.io/source",
+			},
+			want: true,
+		},
+		{
+			name: "wildcard value expression",
+			expr: "(konveyor.io/target && konveyor.io/source=test)",
+			ruleLabels: []string{
+				"konveyor.io/target=eap",
+				"konveyor.io/source",
+			},
+			want: true,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {