Implement flux debug kustomization command

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

cmd/flux/debug_kustomization_test.go

@@ -0,0 +1,71 @@
+//go:build unit
+// +build unit
+
+/*
+Copyright 2024 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"testing"
+)
+
+func TestDebugKustomization(t *testing.T) {
+	namespace := allocateNamespace("debug")
+
+	objectFile := "testdata/debug_kustomization/objects.yaml"
+	tmpl := map[string]string{
+		"fluxns": namespace,
+	}
+	testEnv.CreateObjectFile(objectFile, tmpl, t)
+
+	cases := []struct {
+		name       string
+		arg        string
+		goldenFile string
+		tmpl       map[string]string
+	}{
+		{
+			"debug status",
+			"debug ks test --show-status --show-vars=false",
+			"testdata/debug_kustomization/status.golden.yaml",
+			tmpl,
+		},
+		{
+			"debug vars",
+			"debug ks test --show-vars --show-status=false",
+			"testdata/debug_kustomization/vars.golden.env",
+			tmpl,
+		},
+		{
+			"debug vars from",
+			"debug ks test-from --show-vars --show-status=false",
+			"testdata/debug_kustomization/vars-from.golden.env",
+			tmpl,
+		},
+	}
+
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			cmd := cmdTestCase{
+				args:   tt.arg + " -n=" + namespace,
+				assert: assertGoldenTemplateFile(tt.goldenFile, tmpl),
+			}
+
+			cmd.runTestCmd(t)
+		})
+	}
+}