Terratest Helm Charts 在 Go 单元测试中失败

php小编草莓发现，Terratest Helm Charts 在 Go 单元测试中经常遇到失败的问题。Terratest 是一个用于编写自动化、可重复的基础设施测试的 Go 语言库，而 Helm Charts 则是 Kubernetes 的包管理工具。在使用 Terratest 进行 Helm Charts 的单元测试时，有时会出现各种各样的问题，导致测试失败。本文将探讨这些问题的原因，并提供相应的解决方案，帮助开发者更好地应对这些挑战。无论是初学者还是有经验的开发者，都能从本文中获得有益的知识和技巧。

问题内容

我正在尝试使用 terratest 对我的 helm 图表进行单元测试，但遇到了一个奇怪的错误：

这是我的单元测试：

package grafanaimport (    "fmt"    "testing"    corev1 "k8s.io/api/core/v1"    "github.com/gruntwork-io/terratest/modules/helm")func testgrafanahelmcharttemplate(t *testing.t) {    // path to the helm chart we will test    helmchartgrafanapath := "../../../open-electrons-monitoring"    // setup the args. for this test, we will set the following input values:    // - image=grafana:latest    options := &helm.options{        setvalues: map[string]string{"image": "grafana:latest"},    }    // run rendertemplate to render the template and capture the output.    output := helm.rendertemplate(t, options, helmchartgrafanapath, "pod", []string{"templates/grafana/grafana-deployment.yml"})    // now we use kubernetes/client-go library to render the template output into the pod struct. this will    // ensure the pod resource is rendered correctly.    var pod corev1.pod    helm.unmarshalk8syaml(t, output, &pod)    // finally, we verify the pod spec is set to the expected container image value    expectedcontainerimage := "grafana:latest"    podcontainers := pod.spec.containers    fmt.print(pod.spec)    fmt.print("*********************************************************")    if podcontainers[0].image != expectedcontainerimage {        t.fatalf("rendered container image (%s) is not expected (%s)", podcontainers[0].image, expectedcontainerimage)    }}

登录后复制

以下是部署的输出：

testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: apiversion: apps/v1testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: kind: deploymenttestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: metadata:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:   name: grafana-open-electrons-monitoringtestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:   namespace: open-electrons-monitoring-nstestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:   labels:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     app.kubernetes.io/name: open-electrons-grafanatestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     app.kubernetes.io/component: monitoringtestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     app.kubernetes.io/part-of: open-electrons-grafanatestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     app.kubernetes.io/managed-by: helmtestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     app.kubernetes.io/instance: open-electrons-grafanatestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     app.kubernetes.io/version: refs/tags/v0.0.11 # todo: better use the grafana versiontestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66: spec:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:   replicas: 1testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:   selector:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     matchlabels:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       app: open-electrons-grafanatestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:   strategy:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     rollingupdate:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       maxsurge: 1testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       maxunavailable: 1testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     type: rollingupdatetestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:   template:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     metadata:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       creationtimestamp: nulltestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       labels:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         name: open-electrons-grafanatestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:     spec:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       securitycontext:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         runasuser: 1000testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         runasgroup: 3000testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         fsgroup: 2000testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         runasnonroot: truetestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       containers:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         - image: grafana/grafana:latesttestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:           imagepullpolicy: ifnotpresenttestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:           name: open-electrons-grafanatestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:           ports:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:             - containerport: 3000testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               protocol: tcptestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:           resources:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:             limits:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               memory: "1gi"testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               cpu: "1000m"testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:             requests:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               memory: 500mtestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               cpu: "500m"testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:           volumemounts:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:             - mountpath: /var/lib/grafanatestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               name: grafana-storagetestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:             - mountpath: /etc/grafana/provisioning/datasourcestestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               name: grafana-datasourcestestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:               readonly: falsetestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       restartpolicy: alwaystestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       terminationgraceperiodseconds: 30testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:       volumes:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         - name: grafana-storagetestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:           emptydir: {}testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:         - name: grafana-datasourcestestgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:           configmap:testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:             defaultmode: 420testgrafanahelmcharttemplate 2023-02-12t18:59:01+01:00 logger.go:66:             name: grafana-datasources{[] [] [] []    map[]     false false false  nil []   nil  [] []   nil []  map[] [] }*********************************************************--- fail: testgrafanahelmcharttemplate (0.06s)

登录后复制

这是输出：

panic: runtime error: index out of range [0] with length 0 [recovered]    panic: runtime error: index out of range [0] with length 0goroutine 5 [running]:testing.tRunner.func1.2({0x1440620, 0xc0002a85b8})    /usr/local/go/src/testing/testing.go:1526 +0x24etesting.tRunner.func1()    /usr/local/go/src/testing/testing.go:1529 +0x39fpanic({0x1440620, 0xc0002a85b8})    /usr/local/go/src/runtime/panic.go:884 +0x213

登录后复制

为什么会失败？我在这里缺少什么？

解决方法

我设法把它修好了。导入应该是这样的：

appsv1 "k8s.io/api/apps/v1"

登录后复制

然后我必须修改 deployment 对象的实例化：

var deployment appsv1.Deployment

登录后复制

而不是 pod 对象。

以上就是Terratest Helm Charts 在 Go 单元测试中失败的详细内容，更多请关注【创想鸟】其它相关文章！