337 lines
8.6 KiB
Go
337 lines
8.6 KiB
Go
package app
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import (
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"bufio"
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"bytes"
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"io"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/stretchr/testify/require"
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"github.com/variantdev/vals"
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"github.com/helmfile/helmfile/pkg/exectest"
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"github.com/helmfile/helmfile/pkg/helmexec"
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"github.com/helmfile/helmfile/pkg/testhelper"
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)
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func TestTemplate(t *testing.T) {
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type fields struct {
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skipNeeds bool
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includeNeeds bool
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includeTransitiveNeeds bool
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}
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type testcase struct {
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fields fields
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ns string
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error string
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selectors []string
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templated []exectest.Release
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}
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check := func(t *testing.T, tc testcase) {
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t.Helper()
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wantTemplates := tc.templated
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var helm = &exectest.Helm{
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FailOnUnexpectedList: true,
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FailOnUnexpectedDiff: true,
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DiffMutex: &sync.Mutex{},
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ChartsMutex: &sync.Mutex{},
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ReleasesMutex: &sync.Mutex{},
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}
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bs := &bytes.Buffer{}
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func() {
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t.Helper()
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logReader, logWriter := io.Pipe()
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logFlushed := &sync.WaitGroup{}
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// Ensure all the log is consumed into `bs` by calling `logWriter.Close()` followed by `logFlushed.Wait()`
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logFlushed.Add(1)
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go func() {
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scanner := bufio.NewScanner(logReader)
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for scanner.Scan() {
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bs.Write(scanner.Bytes())
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bs.WriteString("\n")
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}
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logFlushed.Done()
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}()
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defer func() {
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// This is here to avoid data-trace on bytes buffer `bs` to capture logs
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if err := logWriter.Close(); err != nil {
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panic(err)
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}
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logFlushed.Wait()
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}()
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logger := helmexec.NewLogger(logWriter, "debug")
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valsRuntime, err := vals.New(vals.Options{CacheSize: 32})
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if err != nil {
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t.Errorf("unexpected error creating vals runtime: %v", err)
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}
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files := map[string]string{
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"/path/to/helmfile.yaml": `
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releases:
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- name: logging
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chart: incubator/raw
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namespace: kube-system
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- name: kubernetes-external-secrets
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chart: incubator/raw
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namespace: kube-system
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needs:
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- kube-system/logging
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- name: external-secrets
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chart: incubator/raw
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namespace: default
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labels:
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app: test
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needs:
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- kube-system/kubernetes-external-secrets
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- name: my-release
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chart: incubator/raw
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namespace: default
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labels:
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app: test
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needs:
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- default/external-secrets
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# Disabled releases are treated as missing
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- name: disabled
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chart: incubator/raw
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namespace: kube-system
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installed: false
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- name: test2
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chart: incubator/raw
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needs:
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- kube-system/disabled
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- name: test3
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chart: incubator/raw
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needs:
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- test2
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`,
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}
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app := appWithFs(&App{
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OverrideHelmBinary: DefaultHelmBinary,
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glob: filepath.Glob,
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abs: filepath.Abs,
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OverrideKubeContext: "default",
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Env: "default",
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Logger: logger,
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helms: map[helmKey]helmexec.Interface{
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createHelmKey("helm", "default"): helm,
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},
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valsRuntime: valsRuntime,
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}, files)
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if tc.ns != "" {
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app.Namespace = tc.ns
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}
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if tc.selectors != nil {
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app.Selectors = tc.selectors
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}
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tmplErr := app.Template(applyConfig{
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// if we check log output, concurrency must be 1. otherwise the test becomes non-deterministic.
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concurrency: 1,
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logger: logger,
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skipNeeds: tc.fields.skipNeeds,
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includeNeeds: tc.fields.includeNeeds,
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includeTransitiveNeeds: tc.fields.includeTransitiveNeeds,
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})
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var gotErr string
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if tmplErr != nil {
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gotErr = tmplErr.Error()
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}
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if d := cmp.Diff(tc.error, gotErr); d != "" {
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t.Fatalf("unexpected error: want (-), got (+): %s", d)
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}
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require.Equal(t, wantTemplates, helm.Templated)
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}()
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testNameComponents := strings.Split(t.Name(), "/")
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testBaseName := strings.ToLower(
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strings.ReplaceAll(
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testNameComponents[len(testNameComponents)-1],
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" ",
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"_",
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),
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)
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wantLogFileDir := filepath.Join("testdata", "app_template_test")
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wantLogFile := filepath.Join(wantLogFileDir, testBaseName)
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wantLogData, err := os.ReadFile(wantLogFile)
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updateLogFile := err != nil
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wantLog := string(wantLogData)
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gotLog := bs.String()
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if updateLogFile {
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if err := os.MkdirAll(wantLogFileDir, 0755); err != nil {
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t.Fatalf("unable to create directory %q: %v", wantLogFileDir, err)
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}
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if err := os.WriteFile(wantLogFile, bs.Bytes(), 0644); err != nil {
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t.Fatalf("unable to update lint log snapshot: %v", err)
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}
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}
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diff, exists := testhelper.Diff(wantLog, gotLog, 3)
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if exists {
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t.Errorf("unexpected log:\nDIFF\n%s\nEOD", diff)
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}
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}
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t.Run("fail on unselected need by default", func(t *testing.T) {
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check(t, testcase{
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selectors: []string{"app=test"},
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error: `in ./helmfile.yaml: release "default/default/external-secrets" depends on "default/kube-system/kubernetes-external-secrets" which does not match the selectors. Please add a selector like "--selector name=kubernetes-external-secrets", or indicate whether to skip (--skip-needs) or include (--include-needs) these dependencies`,
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})
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})
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t.Run("skip-needs", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: true,
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},
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selectors: []string{"app=test"},
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templated: []exectest.Release{
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{Name: "external-secrets", Flags: []string{"--namespace", "default"}},
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{Name: "my-release", Flags: []string{"--namespace", "default"}},
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},
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})
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})
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t.Run("include-needs", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: false,
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includeNeeds: true,
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},
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error: ``,
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selectors: []string{"app=test"},
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templated: []exectest.Release{
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// TODO: Turned out we can't differentiate needs vs transitive needs in this case :thinking:
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{Name: "logging", Flags: []string{"--namespace", "kube-system"}},
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{Name: "kubernetes-external-secrets", Flags: []string{"--namespace", "kube-system"}},
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{Name: "external-secrets", Flags: []string{"--namespace", "default"}},
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{Name: "my-release", Flags: []string{"--namespace", "default"}},
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},
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})
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})
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t.Run("include-transitive-needs", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: false,
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includeTransitiveNeeds: true,
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},
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error: ``,
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selectors: []string{"app=test"},
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templated: []exectest.Release{
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{Name: "logging", Flags: []string{"--namespace", "kube-system"}},
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{Name: "kubernetes-external-secrets", Flags: []string{"--namespace", "kube-system"}},
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{Name: "external-secrets", Flags: []string{"--namespace", "default"}},
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{Name: "my-release", Flags: []string{"--namespace", "default"}},
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},
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})
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})
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t.Run("include-needs should not fail on disabled direct need", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: false,
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includeNeeds: true,
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},
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selectors: []string{"name=test2"},
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templated: []exectest.Release{
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{Name: "test2", Flags: []string(nil)},
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},
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})
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})
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t.Run("include-needs should not fail on disabled transitive need", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: false,
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includeNeeds: true,
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},
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selectors: []string{"name=test3"},
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templated: []exectest.Release{
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{Name: "test2", Flags: []string(nil)},
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{Name: "test3", Flags: []string(nil)},
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},
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})
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})
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t.Run("include-transitive-needs should not fail on disabled transitive need", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: false,
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includeNeeds: false,
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includeTransitiveNeeds: true,
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},
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selectors: []string{"name=test3"},
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templated: []exectest.Release{
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{Name: "test2", Flags: []string(nil)},
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{Name: "test3", Flags: []string(nil)},
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},
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})
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})
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t.Run("include-needs with include-transitive-needs should not fail on disabled direct need", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: false,
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includeNeeds: true,
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includeTransitiveNeeds: true,
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},
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selectors: []string{"name=test2"},
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templated: []exectest.Release{
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{Name: "test2", Flags: []string(nil)},
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},
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})
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})
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t.Run("include-needs with include-transitive-needs should not fail on disabled transitive need", func(t *testing.T) {
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check(t, testcase{
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fields: fields{
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skipNeeds: false,
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includeNeeds: true,
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includeTransitiveNeeds: true,
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},
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selectors: []string{"name=test3"},
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templated: []exectest.Release{
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{Name: "test2", Flags: []string(nil)},
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{Name: "test3", Flags: []string(nil)},
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},
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})
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})
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t.Run("bad selector", func(t *testing.T) {
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check(t, testcase{
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selectors: []string{"app=test_non_existent"},
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templated: nil,
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error: "err: no releases found that matches specified selector(app=test_non_existent) and environment(default), in any helmfile",
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})
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})
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}
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