Put kubeconfig tests in a separate suite [#5]

As I started writing tests for EKS config, dealing with the repeated
setup/verification code was cumbersome. This should make it much easier
to add new tests.

internal/run/kubeconfig_test.go

@@ -0,0 +1,92 @@
+package run
+
+import (
+	"github.com/stretchr/testify/suite"
+	yaml "gopkg.in/yaml.v2"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+type KubeconfigTestSuite struct {
+	suite.Suite
+	configFile *os.File
+	initKube   InitKube
+}
+
+func (suite *KubeconfigTestSuite) BeforeTest(_, _ string) {
+	file, err := ioutil.TempFile("", "kubeconfig********.yml")
+	suite.Require().NoError(err)
+	file.Close()
+	suite.configFile = file
+
+	// set up an InitKube with the bare minimum configuration
+	suite.initKube = InitKube{
+		ConfigFile:   file.Name(),
+		TemplateFile: "../../assets/kubeconfig.tpl", // the actual kubeconfig template
+		APIServer:    "a",
+		Token:        "b",
+	}
+}
+
+func (suite *KubeconfigTestSuite) AfterTest(_, _ string) {
+	if suite.configFile != nil {
+		os.Remove(suite.configFile.Name())
+	}
+}
+
+func TestKubeconfigTestSuite(t *testing.T) {
+	suite.Run(t, new(KubeconfigTestSuite))
+}
+
+func (suite *KubeconfigTestSuite) TestSetsNamespace() {
+	cfg := Config{
+		Namespace: "marshmallow",
+	}
+	contents := suite.generateKubeconfig(cfg)
+	suite.Contains(contents, "namespace: marshmallow")
+}
+
+func (suite *KubeconfigTestSuite) TestSetsAPIServer() {
+	suite.initKube.APIServer = "https://kube.cluster/peanut"
+	contents := suite.generateKubeconfig(Config{})
+	suite.Contains(contents, "server: https://kube.cluster/peanut")
+}
+
+func (suite *KubeconfigTestSuite) TestSetsServiceAccount() {
+	suite.initKube.ServiceAccount = "chef"
+	contents := suite.generateKubeconfig(Config{})
+	suite.Contains(contents, "user: chef")
+	suite.Contains(contents, "name: chef")
+}
+
+func (suite *KubeconfigTestSuite) TestSetsToken() {
+	suite.initKube.Token = "eWVhaCB3ZSB0b2tpbic"
+	contents := suite.generateKubeconfig(Config{})
+	suite.Contains(contents, "token: eWVhaCB3ZSB0b2tpbic")
+}
+
+func (suite *KubeconfigTestSuite) TestSetsCertificate() {
+	suite.initKube.Certificate = "d293LCB5b3UgYXJlIHNvIGNvb2wgZm9yIHNtb2tpbmcgd2VlZCDwn5mE"
+	contents := suite.generateKubeconfig(Config{})
+	suite.Contains(contents, "certificate-authority-data: d293LCB5b3UgYXJlIHNvIGNvb2wgZm9yIHNtb2tpbmcgd2VlZCDwn5mE")
+}
+
+func (suite *KubeconfigTestSuite) TestSetsSkipTLSVerify() {
+	suite.initKube.SkipTLSVerify = true
+	contents := suite.generateKubeconfig(Config{})
+	suite.Contains(contents, "insecure-skip-tls-verify: true")
+}
+
+func (suite *KubeconfigTestSuite) generateKubeconfig(cfg Config) string {
+	suite.Require().NoError(suite.initKube.Prepare(cfg))
+	suite.Require().NoError(suite.initKube.Execute(cfg))
+
+	contents, err := ioutil.ReadFile(suite.configFile.Name())
+	suite.Require().NoError(err)
+
+	conf := map[string]interface{}{}
+	suite.NoError(yaml.UnmarshalStrict(contents, &conf))
+
+	return string(contents)
+}