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helm/pkg/releasetesting/test_suite.go

205 lines
5.2 KiB

/*
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 releasetesting
import (
"bytes"
"fmt"
"log"
"strings"
"time"
"github.com/ghodss/yaml"
"github.com/golang/protobuf/ptypes/timestamp"
"k8s.io/kubernetes/pkg/api"
"k8s.io/helm/pkg/proto/hapi/release"
util "k8s.io/helm/pkg/releaseutil"
"k8s.io/helm/pkg/timeconv"
)
// TestSuite what tests are run, results, and metadata
type TestSuite struct {
StartedAt *timestamp.Timestamp
CompletedAt *timestamp.Timestamp
TestManifests []string
Results []*release.TestRun
}
type test struct {
manifest string
result *release.TestRun
}
// NewTestSuite takes a release object and returns a TestSuite object with test definitions
// extracted from the release
func NewTestSuite(rel *release.Release) (*TestSuite, error) {
testManifests, err := extractTestManifestsFromHooks(rel.Hooks, rel.Name)
if err != nil {
return nil, err
}
results := []*release.TestRun{}
return &TestSuite{
TestManifests: testManifests,
Results: results,
}, nil
}
// Run executes tests in a test suite and stores a result within the context of a given environment
func (t *TestSuite) Run(env *Environment) error {
t.StartedAt = timeconv.Now()
for _, testManifest := range t.TestManifests {
test, err := newTest(testManifest)
if err != nil {
return err
}
test.result.StartedAt = timeconv.Now()
if err := env.streamRunning(test.result.Name); err != nil {
return err
}
resourceCreated := true
if err := t.createTestPod(test, env); err != nil {
resourceCreated = false
if streamErr := env.streamError(test.result.Info); streamErr != nil {
return err
}
}
resourceCleanExit := true
status := api.PodUnknown
if resourceCreated {
status, err = t.getTestPodStatus(test, env)
if err != nil {
resourceCleanExit = false
if streamErr := env.streamUnknown(test.result.Name, test.result.Info); streamErr != nil {
return streamErr
}
}
}
if resourceCreated && resourceCleanExit && status == api.PodSucceeded {
test.result.Status = release.TestRun_SUCCESS
if streamErr := env.streamSuccess(test.result.Name); streamErr != nil {
return streamErr
}
} else if resourceCreated && resourceCleanExit && status == api.PodFailed {
test.result.Status = release.TestRun_FAILURE
if streamErr := env.streamFailed(test.result.Name); streamErr != nil {
return err
}
}
test.result.CompletedAt = timeconv.Now()
t.Results = append(t.Results, test.result)
}
t.CompletedAt = timeconv.Now()
return nil
}
// NOTE: may want to move this function to pkg/tiller in the future
func filterHooksForTestHooks(hooks []*release.Hook, releaseName string) ([]*release.Hook, error) {
testHooks := []*release.Hook{}
notFoundErr := fmt.Errorf("no tests found for release %s", releaseName)
if len(hooks) == 0 {
return nil, notFoundErr
}
for _, h := range hooks {
for _, e := range h.Events {
if e == release.Hook_RELEASE_TEST_SUCCESS {
testHooks = append(testHooks, h)
continue
}
}
}
if len(testHooks) == 0 {
return nil, notFoundErr
}
return testHooks, nil
}
// NOTE: may want to move this function to pkg/tiller in the future
func extractTestManifestsFromHooks(hooks []*release.Hook, releaseName string) ([]string, error) {
testHooks, err := filterHooksForTestHooks(hooks, releaseName)
if err != nil {
return nil, err
}
tests := []string{}
for _, h := range testHooks {
individualTests := util.SplitManifests(h.Manifest)
for _, t := range individualTests {
tests = append(tests, t)
}
}
return tests, nil
}
func newTest(testManifest string) (*test, error) {
var sh util.SimpleHead
err := yaml.Unmarshal([]byte(testManifest), &sh)
if err != nil {
return nil, err
}
if sh.Kind != "Pod" {
return nil, fmt.Errorf("%s is not a pod", sh.Metadata.Name)
}
name := strings.TrimSuffix(sh.Metadata.Name, ",")
return &test{
manifest: testManifest,
result: &release.TestRun{
Name: name,
},
}, nil
}
func (t *TestSuite) createTestPod(test *test, env *Environment) error {
b := bytes.NewBufferString(test.manifest)
if err := env.KubeClient.Create(env.Namespace, b, env.Timeout, false); err != nil {
log.Printf(err.Error())
test.result.Info = err.Error()
test.result.Status = release.TestRun_FAILURE
return err
}
return nil
}
func (t *TestSuite) getTestPodStatus(test *test, env *Environment) (api.PodPhase, error) {
b := bytes.NewBufferString(test.manifest)
status, err := env.KubeClient.WaitAndGetCompletedPodPhase(env.Namespace, b, time.Duration(env.Timeout)*time.Second)
if err != nil {
log.Printf("Error getting status for pod %s: %s", test.result.Name, err)
test.result.Info = err.Error()
test.result.Status = release.TestRun_UNKNOWN
return status, err
}
return status, err
}