Add some tests to our cert generation.

pkg/util/crypto_test.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 util
+
+import (
+	"crypto/x509"
+	"encoding/pem"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestGenerateCACert(t *testing.T) {
+	tmpDir, err := ioutil.TempDir("", "")
+	if err != nil {
+		t.Fatalf("Error generating tmpdir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	certPath := filepath.Join(tmpDir, "cert")
+	keyPath := filepath.Join(tmpDir, "key")
+	if err := GenerateCACert(certPath, keyPath); err != nil {
+		t.Fatalf("GenerateCACert() error = %v", err)
+	}
+
+	// Check the cert has the right shape.
+	certBytes, err := ioutil.ReadFile(certPath)
+	if err != nil {
+		t.Fatalf("Error reading cert data: %v", err)
+	}
+	data, _ := pem.Decode(certBytes)
+	c, err := x509.ParseCertificate(data.Bytes)
+	if err != nil {
+		t.Fatalf("Error parsing certificate: %v", err)
+	}
+	if !c.IsCA {
+		t.Fatalf("Cert is not a CA cert.")
+	}
+}