prometheus/config/config_test.go

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// Copyright 2013 Prometheus Team
// 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 config
import (
"fmt"
"io/ioutil"
"path"
"strings"
"testing"
)
var fixturesPath = "fixtures"
var configTests = []struct {
inputFile string
printedFile string
shouldFail bool
errContains string
}{
{
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inputFile: "minimal.conf.input",
printedFile: "minimal.conf.printed",
}, {
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inputFile: "sample.conf.input",
printedFile: "sample.conf.printed",
}, {
// TODO: Options that are not provided should be set to sane defaults or
// create errors during config loading (as appropriate). Right now, these
// options remain at their zero-values, which is probably not what we want.
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inputFile: "empty.conf.input",
printedFile: "empty.conf.printed",
},
// TODO: To enable testing of bad configs, we first need to change config
// loading so that it doesn't exit when loading a bad config. Instead, the
// configuration error should be passed back all the way to the caller.
//
//{
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// inputFile: "bad_job_option.conf.input",
// shouldFail: true,
// errContains: "Missing job name",
//},
}
func TestConfigs(t *testing.T) {
for _, configTest := range configTests {
testConfig, err := LoadFromFile(path.Join(fixturesPath, configTest.inputFile))
if err != nil {
if !configTest.shouldFail {
t.Errorf("Error parsing config %v: %v", configTest.inputFile, err)
} else {
if !strings.Contains(err.Error(), configTest.errContains) {
t.Errorf("Expected error containing '%v', got: %v", configTest.errContains, err)
}
}
} else {
printedConfig, err := ioutil.ReadFile(path.Join(fixturesPath, configTest.printedFile))
if err != nil {
t.Errorf("Error reading config %v: %v", configTest.inputFile, err)
continue
}
expected := string(printedConfig)
actual := testConfig.ToString(0)
if actual != expected {
t.Errorf("%v: printed config doesn't match expected output", configTest.inputFile)
t.Errorf("Expected:\n%v\n\nActual:\n%v\n", expected, actual)
t.Errorf("Writing expected and actual printed configs to /tmp for diffing (see test source for paths)")
ioutil.WriteFile(fmt.Sprintf("/tmp/%s.expected", configTest.printedFile), []byte(expected), 0600)
ioutil.WriteFile(fmt.Sprintf("/tmp/%s.actual", configTest.printedFile), []byte(actual), 0600)
}
}
}
}