kubeadm: adding integration tests for init

removed two tests cases that tested for success because they require
waiting for the control plan to get ready

cmd/kubeadm/test/cmd/init_test.go

@@ -0,0 +1,49 @@
+/*
+Copyright 2016 The Kubernetes 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 kubeadm
+
+import "testing"
+
+// kubeadmReset executes "kubeadm reset" and restarts kubelet.
+func kubeadmReset() error {
+	_, _, err := RunCmd(kubeadmPath, "reset")
+	return err
+}
+
+func TestCmdInitToken(t *testing.T) {
+	var initTest = []struct {
+		args     string
+		expected bool
+	}{
+		{"--discovery=token://abcd:1234567890abcd", false},     // invalid token size
+		{"--discovery=token://Abcdef:1234567890abcdef", false}, // invalid token non-lowercase
+	}
+
+	for _, rt := range initTest {
+		_, _, actual := RunCmd(kubeadmPath, "init", rt.args, "--skip-preflight-checks")
+		if (actual == nil) != rt.expected {
+			t.Errorf(
+				"failed CmdInitToken running 'kubeadm init %s' with an error: %v\n\texpected: %t\n\t  actual: %t",
+				rt.args,
+				actual,
+				rt.expected,
+				(actual == nil),
+			)
+		}
+		kubeadmReset()
+	}
+}