test: add test file for validate.lua #7

tests/kustomize/test_data/validate/fail.yaml

@@ -0,0 +1,22 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+labels:
+  app: nginx
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+        - name: nginx
+          image: nginx:1.14.2
+          ports:
+            - containerPort: 80

tests/kustomize/test_data/validate/pass.yaml

@@ -0,0 +1,22 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  labels:
+    app: nginx
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+        - name: nginx
+          image: nginx:1.14.2
+          ports:
+            - containerPort: 80

tests/kustomize/test_validate.lua

@@ -0,0 +1,19 @@
+local eq = MiniTest.expect.equality
+
+local validate = require("kustomize.validate")
+
+local want = {
+  "tests/kustomize/test_data/validate/fail.yaml - Deployment nginx-deployment is invalid: For field (root): Additional property labels is not allowed",
+}
+
+describe("validate", function()
+  it("valid Kubernetes deployment", function()
+    local out = validate.run_validation("tests/kustomize/test_data/validate/pass.yaml")
+    eq(out, {})
+  end)
+
+  it("invalid Kubernetes deployment", function()
+    local out = validate.run_validation("tests/kustomize/test_data/validate/fail.yaml")
+    eq(out, want)
+  end)
+end)