Add integration test for NodeResourceLimits plugin

Author: notpad

test/integration/scheduler/BUILD

@@ -13,6 +13,7 @@ go_test(
         "extender_test.go",
         "framework_test.go",
         "main_test.go",
+        "plugins_test.go",
         "predicates_test.go",
         "preemption_test.go",
         "priorities_test.go",

test/integration/scheduler/plugins_test.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package scheduler
+
+import (
+	"testing"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	featuregatetesting "k8s.io/component-base/featuregate/testing"
+	"k8s.io/kubernetes/pkg/features"
+)
+
+func TestNodeResourceLimits(t *testing.T) {
+	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ResourceLimitsPriorityFunction, true)()
+
+	context := initTest(t, "node-resource-limits")
+	defer cleanupTest(t, context)
+
+	// Add one node
+	expectedNode, err := createNode(context.clientSet, "test-node1", &v1.ResourceList{
+		v1.ResourcePods:   *resource.NewQuantity(32, resource.DecimalSI),
+		v1.ResourceCPU:    *resource.NewMilliQuantity(2000, resource.DecimalSI),
+		v1.ResourceMemory: *resource.NewQuantity(2000, resource.DecimalSI),
+	})
+	if err != nil {
+		t.Fatalf("Cannot create node: %v", err)
+	}
+
+	// Add another node with less resource
+	_, err = createNode(context.clientSet, "test-node2", &v1.ResourceList{
+		v1.ResourcePods:   *resource.NewQuantity(32, resource.DecimalSI),
+		v1.ResourceCPU:    *resource.NewMilliQuantity(1000, resource.DecimalSI),
+		v1.ResourceMemory: *resource.NewQuantity(1000, resource.DecimalSI),
+	})
+	if err != nil {
+		t.Fatalf("Cannot create node: %v", err)
+	}
+
+	podName := "pod-with-resource-limits"
+	pod, err := runPausePod(context.clientSet, initPausePod(context.clientSet, &pausePodConfig{
+		Name:      podName,
+		Namespace: context.ns.Name,
+		Resources: &v1.ResourceRequirements{Requests: v1.ResourceList{
+			v1.ResourceCPU:    *resource.NewMilliQuantity(500, resource.DecimalSI),
+			v1.ResourceMemory: *resource.NewQuantity(500, resource.DecimalSI)},
+		},
+	}))
+	if err != nil {
+		t.Fatalf("Error running pause pod: %v", err)
+	}
+
+	if pod.Spec.NodeName != expectedNode.Name {
+		t.Errorf("pod %v got scheduled on an unexpected node: %v. Expected node: %v.", podName, pod.Spec.NodeName, expectedNode.Name)
+	} else {
+		t.Logf("pod %v got successfully scheduled on node %v.", podName, pod.Spec.NodeName)
+	}
+}