feat(#1): skeleton helm chart with tests

.github/workflows/helm-unit-tests.yml

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+name: Run Helm Unit-Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  run-helm-unit-tests:
+    permissions:
+      contents: read
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        run: 'git clone -b "$BRANCH_OR_TAG_NAME" --depth 1 "$FULL_REPO_URL" app'
+        shell: bash
+        env:
+          FULL_REPO_URL: "https://github.com/${{ github.repository }}"
+          BRANCH_OR_TAG_NAME: ${{ github.ref_name }}
+
+      - name: Docker build and push image
+        run: >
+          cd app &&
+          docker run --rm -v ${{ github.workspace }}/app:/apps helmunittest/helm-unittest:3.12.3-0.3.5 .
+        shell: bash

.helmignore

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+.git/
+.gitignore
+
+*.swp
+*.tmp
+
+.idea/
+.vscode/
+
+tests
+*.tgz
+

Chart.yaml

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+apiVersion: v2
+name: eurofurence-regsys
+version: 0.0.1
+description: A helm chart that can deploy the Eurofurence Registration System.
+type: application
+home: https://github.com/eurofurence/reg-helm-chart

README.md

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+# reg-helm-chart
+
+<img src="https://github.com/eurofurence/reg-helm-chart/actions/workflows/helm-unit-tests.yml/badge.svg" alt="test status"/>
+
+## Overview
+
+A helm chart that can deploy the Eurofurence Registration System.
+
+## Installation
+
+To use, you just need helm in your path.
+
+To run the unittests, use the [helm-unittest/helm-unittest](https://github.com/helm-unittest/helm-unittest) helm plugin or docker container.
+
+If you have the plugin installed, `helm unittest .` runs all
+unit tests on the command line.

templates/ingress.yaml

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+{{- if (.Values.ingress).enable }}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: regsys
+  {{- with .Values.global.namespace }}
+  namespace: '{{ . }}'
+  {{- end }}
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-live
+    nginx.ingress.kubernetes.io/proxy-body-size: 100m
+    nginx.ingress.kubernetes.io/limit-rps: "9"
+    nginx.ingress.kubernetes.io/limit-rpm: "360"
+    nginx.ingress.kubernetes.io/limit-burst-multiplier: "5"
+    nginx.ingress.kubernetes.io/limit-whitelist: "10.200.10.1/24,85.199.154.55/32,2001:1a50:a::/64,31.16.177.200/32"
+  labels:
+    name: ef-regsys
+spec:
+  ingressClassName: nginx
+  rules:
+    - host: regsys.test.eurofurence.org
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: regsys
+                port:
+                  number: 8080
+  tls:
+    - hosts:
+        - regsys.test.eurofurence.org
+      secretName: regsys-test-certificate
+---
+{{- end }}

tests/ingress_test.yaml

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+suite: test ingress
+templates:
+  - ingress.yaml
+tests:
+  - it: should not create anything by default
+    asserts:
+      - hasDocuments:
+          count: 0
+  - it: should create an ingress if enabled
+    set:
+      ingress:
+        enable: true
+    asserts:
+      - isKind:
+          of: Ingress
+      - hasDocuments:
+          count: 1
+  - it: should not set namespace if unset
+    set:
+      ingress:
+        enable: true
+    asserts:
+      - notExists:
+          path: metadata.namespace
+      - equal:
+          path: spec.rules[0].host
+          value: regsys.test.eurofurence.org
+  - it: should set namespace if specified
+    set:
+      ingress:
+        enable: true
+      global:
+        namespace: hellospace
+    asserts:
+      - equal:
+          path: metadata.namespace
+          value: hellospace

values.schema.json

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+{
+  "$id": "https://github.com/eurofurence/reg-helm-chart/values.schema.json",
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "additionalProperties": false,
+  "title": "Values",
+  "description": "Definition of available values.yaml fields",
+  "type": "object",
+  "properties": {
+    "global": {
+      "type": "object",
+      "description": "global properties (can be set by ArgoCD)",
+      "properties": {
+
+      }
+    },
+    "ingress": {
+      "type": "object",
+      "description": "settings for an ingress (optional, off by default)",
+      "properties": {
+        "enable": {
+          "type": "boolean",
+          "description": "enable creating an ingress",
+          "default": false
+        }
+      }
+    }
+  }
+}

values.yaml

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+global: {}
+  #   set this to supply a namespace with all the resources.
+  # namespace: my-namespace
+
+ingress:
+  enable: false