Merge pull request kubernetes#123557 from iholder101/swap/enhance-swap-functests-serial

[Swap][Tests][KEP2400] Add swap serial stress tests, improve NodeConformance tests and adapt NoSwap behavior

Author: k8s-ci-robot

test/e2e/framework/skipper/skipper.go

@@ -56,8 +56,7 @@ func SkipUnlessAtLeast(value int, minValue int, message string) {
 var featureGate featuregate.FeatureGate
 
 // InitFeatureGates must be called in test suites that have a --feature-gates parameter.
-// If not called, SkipUnlessFeatureGateEnabled and SkipIfFeatureGateEnabled will
-// record a test failure.
+// If not called, SkipUnlessFeatureGateEnabled will record a test failure.
 func InitFeatureGates(defaults featuregate.FeatureGate, overrides map[string]bool) error {
 	clone := defaults.DeepCopy()
 	if err := clone.SetFromMap(overrides); err != nil {
@@ -67,6 +66,16 @@ func InitFeatureGates(defaults featuregate.FeatureGate, overrides map[string]boo
 	return nil
 }
 
+// IsFeatureGateEnabled can be used during e2e tests to figure out if a certain feature gate is enabled.
+// This function is dependent on InitFeatureGates under the hood. Therefore, the test must be called with a
+// --feature-gates parameter.
+func IsFeatureGateEnabled(feature featuregate.Feature) bool {
+	if featureGate == nil {
+		framework.Failf("feature gate interface is not initialized")
+	}
+	return featureGate.Enabled(feature)
+}
+
 // SkipUnlessFeatureGateEnabled skips if the feature is disabled.
 //
 // Beware that this only works in test suites that have a --feature-gate

test/e2e/nodefeature/nodefeature.go

@@ -97,6 +97,10 @@ var (
 	// TODO: document the feature (owning SIG, when to use this feature for a test)
 	RuntimeHandler = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("RuntimeHandler"))
 
+	// Added to test Swap Feature
+	// This label should be used when testing KEP-2400 (Node Swap Support)
+	Swap = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("NodeSwap"))
+
 	// TODO: document the feature (owning SIG, when to use this feature for a test)
 	SidecarContainers = framework.WithNodeFeature(framework.ValidNodeFeatures.Add("SidecarContainers"))