cloudinit/datasource/proc_cmdline/proc_cmdline_test.go

/*
   Copyright 2014 CoreOS, Inc.

   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 proc_cmdline

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"os"
	"testing"
)

func TestParseCmdlineCloudConfigFound(t *testing.T) {
	tests := []struct {
		input  string
		expect string
	}{
		{
			"cloud-config-url=example.com",
			"example.com",
		},
		{
			"cloud_config_url=example.com",
			"example.com",
		},
		{
			"cloud-config-url cloud-config-url=example.com",
			"example.com",
		},
		{
			"cloud-config-url= cloud-config-url=example.com",
			"example.com",
		},
		{
			"cloud-config-url=one.example.com cloud-config-url=two.example.com",
			"two.example.com",
		},
		{
			"foo=bar cloud-config-url=example.com ping=pong",
			"example.com",
		},
	}

	for i, tt := range tests {
		output, err := findCloudConfigURL(tt.input)
		if output != tt.expect {
			t.Errorf("Test case %d failed: %s != %s", i, output, tt.expect)
		}
		if err != nil {
			t.Errorf("Test case %d produced error: %v", i, err)
		}
	}
}

func TestProcCmdlineAndFetchConfig(t *testing.T) {

	var (
		ProcCmdlineTmpl    = "foo=bar cloud-config-url=%s/config\n"
		CloudConfigContent = "#cloud-config\n"
	)

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method == "GET" && r.RequestURI == "/config" {
			fmt.Fprint(w, CloudConfigContent)
		}
	}))
	defer ts.Close()

	file, err := ioutil.TempFile(os.TempDir(), "test_proc_cmdline")
	defer os.Remove(file.Name())
	if err != nil {
		t.Errorf("Test produced error: %v", err)
	}
	_, err = file.Write([]byte(fmt.Sprintf(ProcCmdlineTmpl, ts.URL)))
	if err != nil {
		t.Errorf("Test produced error: %v", err)
	}

	p := NewDatasource()
	p.Location = file.Name()
	cfg, err := p.FetchUserdata()
	if err != nil {
		t.Errorf("Test produced error: %v", err)
	}

	if string(cfg) != CloudConfigContent {
		t.Errorf("Test failed, response body: %s != %s", cfg, CloudConfigContent)
	}
}