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[DO NOT MERGE] Add tests for process instances #1824

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143 changes: 143 additions & 0 deletions v3/process_instances.go
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Original file line number Diff line number Diff line change
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package v3

import (
"encoding/json"
"fmt"
"time"

. "github.com/cloudfoundry/cf-acceptance-tests/cats_suite_helpers"
"github.com/cloudfoundry/cf-acceptance-tests/helpers/app_helpers"
"github.com/cloudfoundry/cf-acceptance-tests/helpers/assets"
"github.com/cloudfoundry/cf-acceptance-tests/helpers/random_name"
"github.com/cloudfoundry/cf-acceptance-tests/helpers/v3_helpers"
"github.com/cloudfoundry/cf-test-helpers/v2/cf"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/gbytes"
. "github.com/onsi/gomega/gexec"
)

type ProcessInstance struct {
Index int `json:"index"`
State string `json:"state"`
Since int `json:"since"`
}

type ProcessInstancesResource struct {
ProcessInstances []ProcessInstance `json:"resources"`
}

type ProcessResource struct {
ProcessInstances []ProcessInstance `json:"process_instances"`
}

type ProcessesResource struct {
Processes []ProcessResource `json:"resources"`
}

var _ = V3Describe("process instances", func() {
var (
appName string
webProcess v3_helpers.Process
)

BeforeEach(func() {
appName = random_name.CATSRandomName("APP")

By("pushing the app with three instances")
Expect(cf.Cf("push", appName, "-i", "3", "-b", Config.GetRubyBuildpackName(), "-p", assets.NewAssets().DoraZip).Wait(Config.CfPushTimeoutDuration())).To(Exit(0))

By("waiting until all instances are running")
Eventually(func(g Gomega) {
session := cf.Cf("app", appName).Wait()
g.Expect(session).Should(Say(`instances:\s+3/3`))
}).Should(Succeed())

appGuid := app_helpers.GetAppGuid(appName)
processes := v3_helpers.GetProcesses(appGuid, appName)
webProcess = v3_helpers.GetProcessByType(processes, "web")
})

AfterEach(func() {
app_helpers.AppReport(appName)
Expect(cf.Cf("delete", appName, "-f").Wait(Config.DefaultTimeoutDuration())).To(Exit(0))
})

Context("via different v3 API endpoints", func() {
It("returns an array of process instances", func() {
By("/v3/processes/:guid/process_instances")
{
resource := ProcessInstancesResource{}
getResource(fmt.Sprintf("v3/processes/%s/process_instances", webProcess.Guid), &resource)
Expect(len(resource.ProcessInstances)).To(Equal(3))

for index, instance := range resource.ProcessInstances {
checkProcessInstance(instance, index, "RUNNING")
}
}

By("/v3/processes/:guid?embed=process_instances")
{
resource := ProcessResource{}
getResource(fmt.Sprintf("v3/processes/%s?embed=process_instances", webProcess.Guid), &resource)
Expect(len(resource.ProcessInstances)).To(Equal(3))

for index, instance := range resource.ProcessInstances {
checkProcessInstance(instance, index, "RUNNING")
}
}

By("/v3/processes?guids=:guid&embed=process_instances")
{
resource := ProcessesResource{}
getResource(fmt.Sprintf("v3/processes?guids=%s&embed=process_instances", webProcess.Guid), &resource)
Expect(len(resource.Processes)).To(Equal(1))
Expect(len(resource.Processes[0].ProcessInstances)).To(Equal(3))

for index, instance := range resource.Processes[0].ProcessInstances {
checkProcessInstance(instance, index, "RUNNING")
}
}
})
})

Context("when stopping the app", func() {
It("switches the instances' state from RUNNING to DOWN", func() {
resource := ProcessInstancesResource{}
getResource(fmt.Sprintf("v3/processes/%s/process_instances", webProcess.Guid), &resource)
Expect(len(resource.ProcessInstances)).To(Equal(3))

for index, instance := range resource.ProcessInstances {
checkProcessInstance(instance, index, "RUNNING")
}

By("stopping the app")
Expect(cf.Cf("stop", appName).Wait(Config.DefaultTimeoutDuration())).To(Exit(0))

By("waiting until all instances are stopped")
Eventually(func() []string {
getResource(fmt.Sprintf("v3/processes/%s/process_instances", webProcess.Guid), &resource)
states := []string{}
for _, instance := range resource.ProcessInstances {
states = append(states, instance.State)
}
return states
}, V3_PROCESS_TIMEOUT, 1*time.Second).Should(Equal([]string{"DOWN", "DOWN", "DOWN"}))
Expect(len(resource.ProcessInstances)).To(Equal(3))

for index, instance := range resource.ProcessInstances {
checkProcessInstance(instance, index, "DOWN")
}
})
})
})

func getResource(url string, resource any) {
json.Unmarshal(cf.Cf("curl", url).Wait().Out.Contents(), &resource)
}

func checkProcessInstance(instance ProcessInstance, index int, state string) {
Expect(instance.Index).To(Equal(index))
Expect(instance.State).To(Equal(state))
Expect(instance.Since).To(BeNumerically(">", 0))
}