fix(e2e): validate rendered server fixture

e2e/server_harness_test.go

@@ -13,6 +13,7 @@
 package e2e
 
 import (
+	"bytes"
 	"context"
 	"crypto/ecdsa"
 	"crypto/elliptic"
@@ -32,6 +33,8 @@ import (
 	"testing"
 	"text/template"
 	"time"
+
+	"github.com/labstack/onebox/internal/app"
 )
 
 type server struct {
@@ -173,6 +176,23 @@ func repoRoot(t *testing.T) string {
 	return root
 }
 
+func TestPostgresServerFixtureRendersValidApplication(t *testing.T) {
+	tmpl, err := template.ParseFiles(filepath.Join("testdata", "postgres", "ob.yml.tmpl"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	var rendered bytes.Buffer
+	data := struct{ Server, Endpoint, Version string }{
+		Server: "root@127.0.0.1:2222", Endpoint: "https://backup.example.net:9000", Version: "v1",
+	}
+	if err := tmpl.Execute(&rendered, data); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := app.LoadBytes(rendered.Bytes(), filepath.Join(t.TempDir(), "ob.yml")); err != nil {
+		t.Fatalf("rendered server fixture is not a valid Application: %v\n%s", err, rendered.String())
+	}
+}
+
 // project renders the fixture against this server and returns its directory.
 //
 // The version is what the workload serves, so a second render into the same

e2e/testdata/postgres/ob.yml.tmpl

@@ -5,7 +5,7 @@ metadata:
 spec:
   environments:
     production:
-      server: {? {.Server: ''} : ''}
+      server: "{{ .Server }}"
   # A workload is required, and this one exists only to satisfy that: the suite
   # is about the database beside it. Kept to a sleeping busybox so the deploy
   # costs a pull of a few megabytes rather than a real application image.
@@ -80,7 +80,7 @@ spec:
       persistence: {mode: Durable}
       backup:
         target: offsite
-        recoveryKind: pitr
+        recoveryKind: Pitr
         maxDataLoss: 15m
         schedule: {cron: "0 2 * * *", timezone: UTC}
   backupTargets:
@@ -90,14 +90,14 @@ spec:
       # guest. That is the whole point: nothing about this endpoint is publicly
       # trusted, so it can only verify if ob carries the host's trust store into
       # the container the way it carries the binary.
-      endpoint: {? {.Endpoint: ''} : ''}
+      endpoint: "{{ .Endpoint }}"
       bucket: observer-backups
       failureDomain: {identity: e2e/guest}
       credentials:
         file: secrets/backup.env
         accessKeyEntry: BACKUP_ACCESS_KEY_ID
         secretKeyEntry: BACKUP_SECRET_ACCESS_KEY
-      encryption: {pitr: client-side}
+      encryption: {pitr: ClientSide}
   notifications:
     # The server test starts a one-shot receiver before inducing a scheduled-job
     # timeout. Because the timer fires on the host, localhost is the guest itself.