added fuzz tests for ValidateCPUs function

Fuzz test for ValidateCPUs to verify it handles both valid and invalid inputs without panicking. This ensures that all potential errors are exercised and no panic occurs during execution.

Signed-off-by: Ronny Baturov <[email protected]>

Makefile

@@ -141,9 +141,12 @@ endif
 vet: $(BINDATA)
 	$(GO) vet ./...
 
-test-unit: $(BINDATA)
+test-unit: $(BINDATA) test-fuzz
 	$(GO) test ./cmd/... ./pkg/... -coverprofile cover.out
 
+test-fuzz:
+	$(GO) test ./pkg/apis/performanceprofile/v2 -fuzz=FuzzValidateCPUs -fuzztime=10s 
+
 clean:
 	$(GO) clean $(PACKAGE_MAIN)
 	rm -rf $(BINDATA) $(OUT_DIR) tmp

pkg/apis/performanceprofile/v2/performanceprofile_validation_test.go

@@ -2,6 +2,7 @@ package v2
 
 import (
 	"fmt"
+	"testing"
 
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
@@ -153,6 +154,33 @@ func NewPerformanceProfile(name string) *PerformanceProfile {
 	}
 }
 
+// Fuzz test for ValidateCPUs to ensure it handles invalid inputs and does not panic.
+func FuzzValidateCPUs(f *testing.F) {
+	seeds := []string{"garbage", "a,b,c", "0-1"}
+	for _, seed := range seeds {
+		f.Add(seed)
+	}
+	f.Fuzz(func(t *testing.T, input string) {
+		cpuFields := map[string]func(*PerformanceProfile, CPUSet){
+			"reserved": func(p *PerformanceProfile, input CPUSet) { p.Spec.CPU.Reserved = &input },
+			"isolated": func(p *PerformanceProfile, input CPUSet) { p.Spec.CPU.Isolated = &input },
+			"shared":   func(p *PerformanceProfile, input CPUSet) { p.Spec.CPU.Shared = &input },
+			"offline":  func(p *PerformanceProfile, input CPUSet) { p.Spec.CPU.Offlined = &input },
+		}
+
+		for fieldName, setField := range cpuFields {
+			t.Run(fieldName, func(t *testing.T) {
+				cpuSet := CPUSet(input)
+				profile := NewPerformanceProfile("test")
+
+				setField(profile, cpuSet)
+				// We don't care for the errors we got, only care about panics, which will cause a failure if they occur.
+				_ = profile.validateCPUs()
+			})
+		}
+	})
+}
+
 var _ = Describe("PerformanceProfile", func() {
 	var profile *PerformanceProfile