ci: add tests for hpa resource

package main

import (

	"regexp"

	"testing"

	"github.com/gruntwork-io/terratest/modules/helm"

	"github.com/stretchr/testify/require"

	autoscalingV1 "k8s.io/api/autoscaling/v1"

)

func TestHPA_AutoscalingV1(t *testing.T) {

	templates := []string{"templates/hpa.yaml"}

	releaseName := "hpa-test"

	tcs := []struct {

		name   string

		values map[string]string

		expectedName        string

		expectedMinReplicas int32

		expectedMaxReplicas int32

		expectedTargetCPU   int32

		expectedErrorRegexp *regexp.Regexp

	}{

		{

			name:                "defaults",

			expectedErrorRegexp: regexp.MustCompile("Error: could not find template templates/hpa.yaml in chart"),

		},

		{

			name:                "with hpa enabled, no requests",

			values:              map[string]string{"hpa.enabled": "true"},

			expectedErrorRegexp: regexp.MustCompile("Error: could not find template templates/hpa.yaml in chart"),

		},

		{

			name:                "with hpa enabled and requests defined",

			values:              map[string]string{"hpa.enabled": "true", "resources.requests.cpu": "500"},

			expectedName:        "hpa-test-auto-deploy",

			expectedMinReplicas: 1,

			expectedMaxReplicas: 5,

			expectedTargetCPU:   80,

		},

	}

	for _, tc := range tcs {

		t.Run(tc.name, func(t *testing.T) {

			output, ret := renderTemplate(t, tc.values, releaseName, templates, tc.expectedErrorRegexp)

			if ret == false {

				return

			}

			hpa := new(autoscalingV1.HorizontalPodAutoscaler)

			helm.UnmarshalK8SYaml(t, output, hpa)

			require.Equal(t, tc.expectedName, hpa.ObjectMeta.Name)

			require.Equal(t, tc.expectedMinReplicas, *hpa.Spec.MinReplicas)

			require.Equal(t, tc.expectedMaxReplicas, hpa.Spec.MaxReplicas)

			require.Equal(t, tc.expectedTargetCPU, *hpa.Spec.TargetCPUUtilizationPercentage)

		})

	}

}