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package lua
import (
"fmt"
"testing"
"github.com/argoproj/gitops-engine/pkg/health"
"github.com/ghodss/yaml"
"github.com/stretchr/testify/assert"
lua "github.com/yuin/gopher-lua"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
appv1 "github.com/argoproj/argo-cd/v2/pkg/apis/application/v1alpha1"
"github.com/argoproj/argo-cd/v2/util/grpc"
)
const objJSON = `
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
labels:
app.kubernetes.io/instance: helm-guestbook
name: helm-guestbook
namespace: default
resourceVersion: "123"
`
const objWithNoScriptJSON = `
apiVersion: not-an-endpoint.io/v1alpha1
kind: Test
metadata:
labels:
app.kubernetes.io/instance: helm-guestbook
name: helm-guestbook
namespace: default
resourceVersion: "123"
`
const newHealthStatusFunction = `a = {}
a.status = "Healthy"
a.message ="NeedsToBeChanged"
if obj.metadata.name == "helm-guestbook" then
a.message = "testMessage"
end
return a`
func StrToUnstructured(jsonStr string) *unstructured.Unstructured {
obj := make(map[string]interface{})
err := yaml.Unmarshal([]byte(jsonStr), &obj)
if err != nil {
panic(err)
}
return &unstructured.Unstructured{Object: obj}
}
func TestExecuteNewHealthStatusFunction(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
status, err := vm.ExecuteHealthLua(testObj, newHealthStatusFunction)
assert.Nil(t, err)
expectedHealthStatus := &health.HealthStatus{
Status: "Healthy",
Message: "testMessage",
}
assert.Equal(t, expectedHealthStatus, status)
}
const osLuaScript = `os.getenv("HOME")`
func TestFailExternalLibCall(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
_, err := vm.ExecuteHealthLua(testObj, osLuaScript)
assert.Error(t, err, "")
assert.IsType(t, &lua.ApiError{}, err)
}
const returnInt = `return 1`
func TestFailLuaReturnNonTable(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
_, err := vm.ExecuteHealthLua(testObj, returnInt)
assert.Equal(t, fmt.Errorf(incorrectReturnType, "table", "number"), err)
}
const invalidHealthStatusStatus = `local healthStatus = {}
healthStatus.status = "test"
return healthStatus
`
func TestInvalidHealthStatusStatus(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
status, err := vm.ExecuteHealthLua(testObj, invalidHealthStatusStatus)
assert.Nil(t, err)
expectedStatus := &health.HealthStatus{
Status: health.HealthStatusUnknown,
Message: invalidHealthStatus,
}
assert.Equal(t, expectedStatus, status)
}
const infiniteLoop = `while true do ; end`
func TestHandleInfiniteLoop(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
_, err := vm.ExecuteHealthLua(testObj, infiniteLoop)
assert.IsType(t, &lua.ApiError{}, err)
}
func TestGetHealthScriptWithOverride(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{
ResourceOverrides: map[string]appv1.ResourceOverride{
"argoproj.io/Rollout": {
HealthLua: newHealthStatusFunction,
UseOpenLibs: false,
},
},
}
script, useOpenLibs, err := vm.GetHealthScript(testObj)
assert.Nil(t, err)
assert.Equal(t, false, useOpenLibs)
assert.Equal(t, newHealthStatusFunction, script)
}
func TestGetHealthScriptPredefined(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
script, useOpenLibs, err := vm.GetHealthScript(testObj)
assert.Nil(t, err)
assert.Equal(t, true, useOpenLibs)
assert.NotEmpty(t, script)
}
func TestGetHealthScriptNoPredefined(t *testing.T) {
testObj := StrToUnstructured(objWithNoScriptJSON)
vm := VM{}
script, useOpenLibs, err := vm.GetHealthScript(testObj)
assert.Nil(t, err)
assert.Equal(t, true, useOpenLibs)
assert.Equal(t, "", script)
}
func TestGetResourceActionPredefined(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
action, err := vm.GetResourceAction(testObj, "resume")
assert.Nil(t, err)
assert.NotEmpty(t, action)
}
func TestGetResourceActionNoPredefined(t *testing.T) {
testObj := StrToUnstructured(objWithNoScriptJSON)
vm := VM{}
action, err := vm.GetResourceAction(testObj, "test")
assert.Nil(t, err)
assert.Empty(t, action.ActionLua)
}
func TestGetResourceActionWithOverride(t *testing.T) {
testObj := StrToUnstructured(objJSON)
test := appv1.ResourceActionDefinition{
Name: "test",
ActionLua: "return obj",
}
vm := VM{
ResourceOverrides: map[string]appv1.ResourceOverride{
"argoproj.io/Rollout": {
Actions: string(grpc.MustMarshal(appv1.ResourceActions{
Definitions: []appv1.ResourceActionDefinition{
test,
},
})),
},
},
}
action, err := vm.GetResourceAction(testObj, "test")
assert.Nil(t, err)
assert.Equal(t, test, action)
}
func TestGetResourceActionDiscoveryPredefined(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
discoveryLua, err := vm.GetResourceActionDiscovery(testObj)
assert.Nil(t, err)
assert.NotEmpty(t, discoveryLua)
}
func TestGetResourceActionDiscoveryNoPredefined(t *testing.T) {
testObj := StrToUnstructured(objWithNoScriptJSON)
vm := VM{}
discoveryLua, err := vm.GetResourceActionDiscovery(testObj)
assert.Nil(t, err)
assert.Empty(t, discoveryLua)
}
func TestGetResourceActionDiscoveryWithOverride(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{
ResourceOverrides: map[string]appv1.ResourceOverride{
"argoproj.io/Rollout": {
Actions: string(grpc.MustMarshal(appv1.ResourceActions{
ActionDiscoveryLua: validDiscoveryLua,
})),
},
},
}
discoveryLua, err := vm.GetResourceActionDiscovery(testObj)
assert.Nil(t, err)
assert.Equal(t, validDiscoveryLua, discoveryLua)
}
const validDiscoveryLua = `
scaleParams = { {name = "replicas", type = "number"} }
scale = {name = 'scale', params = scaleParams}
resume = {name = 'resume'}
test = {}
a = {scale = scale, resume = resume, test = test}
return a
`
func TestExecuteResourceActionDiscovery(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
actions, err := vm.ExecuteResourceActionDiscovery(testObj, validDiscoveryLua)
assert.Nil(t, err)
expectedActions := []appv1.ResourceAction{
{
Name: "resume",
}, {
Name: "scale",
Params: []appv1.ResourceActionParam{{
Name: "replicas",
Type: "number",
}},
}, {
Name: "test",
},
}
for _, expectedAction := range expectedActions {
assert.Contains(t, actions, expectedAction)
}
}
const discoveryLuaWithInvalidResourceAction = `
resume = {name = 'resume', invalidField: "test""}
a = {resume = resume}
return a`
func TestExecuteResourceActionDiscoveryInvalidResourceAction(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
actions, err := vm.ExecuteResourceActionDiscovery(testObj, discoveryLuaWithInvalidResourceAction)
assert.Error(t, err)
assert.Nil(t, actions)
}
const invalidDiscoveryLua = `
a = 1
return a
`
func TestExecuteResourceActionDiscoveryInvalidReturn(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
actions, err := vm.ExecuteResourceActionDiscovery(testObj, invalidDiscoveryLua)
assert.Nil(t, actions)
assert.Error(t, err)
}
const validActionLua = `
obj.metadata.labels["test"] = "test"
return obj
`
const expectedUpdatedObj = `
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
labels:
app.kubernetes.io/instance: helm-guestbook
test: test
name: helm-guestbook
namespace: default
resourceVersion: "123"
`
func TestExecuteResourceAction(t *testing.T) {
testObj := StrToUnstructured(objJSON)
expectedObj := StrToUnstructured(expectedUpdatedObj)
vm := VM{}
newObj, err := vm.ExecuteResourceAction(testObj, validActionLua)
assert.Nil(t, err)
assert.Equal(t, expectedObj, newObj)
}
func TestExecuteResourceActionNonTableReturn(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
_, err := vm.ExecuteResourceAction(testObj, returnInt)
assert.Errorf(t, err, incorrectReturnType, "table", "number")
}
const invalidTableReturn = `newObj = {}
newObj["test"] = "test"
return newObj
`
func TestExecuteResourceActionInvalidUnstructured(t *testing.T) {
testObj := StrToUnstructured(objJSON)
vm := VM{}
_, err := vm.ExecuteResourceAction(testObj, invalidTableReturn)
assert.Error(t, err)
}
const objWithEmptyStruct = `
apiVersion: argoproj.io/v1alpha1
kind: Test
metadata:
labels:
app.kubernetes.io/instance: helm-guestbook
test: test
name: helm-guestbook
namespace: default
resourceVersion: "123"
spec:
resources: {}
paused: true
containers:
- name: name1
test: {}
anotherList:
- name: name2
test2: {}
`
const expectedUpdatedObjWithEmptyStruct = `
apiVersion: argoproj.io/v1alpha1
kind: Test
metadata:
labels:
app.kubernetes.io/instance: helm-guestbook
test: test
name: helm-guestbook
namespace: default
resourceVersion: "123"
spec:
resources: {}
paused: false
containers:
- name: name1
test: {}
anotherList:
- name: name2
test2: {}
`
const pausedToFalseLua = `
obj.spec.paused = false
return obj
`
func TestCleanPatch(t *testing.T) {
testObj := StrToUnstructured(objWithEmptyStruct)
expectedObj := StrToUnstructured(expectedUpdatedObjWithEmptyStruct)
vm := VM{}
newObj, err := vm.ExecuteResourceAction(testObj, pausedToFalseLua)
assert.Nil(t, err)
assert.Equal(t, expectedObj, newObj)
}
func TestGetResourceHealth(t *testing.T) {
const testSA = `
apiVersion: v1
kind: ServiceAccount
metadata:
name: test
namespace: test`
const script = `
hs = {}
str = "Using lua standard library"
if string.find(str, "standard") then
hs.message = "Standard lib was used"
else
hs.message = "Standard lib was not used"
end
hs.status = "Healthy"
return hs`
getHealthOverride := func(openLibs bool) ResourceHealthOverrides {
return ResourceHealthOverrides{
"ServiceAccount": appv1.ResourceOverride{
HealthLua: script,
UseOpenLibs: openLibs,
},
}
}
t.Run("Enable Lua standard lib", func(t *testing.T) {
testObj := StrToUnstructured(testSA)
overrides := getHealthOverride(true)
status, err := overrides.GetResourceHealth(testObj)
assert.Nil(t, err)
expectedStatus := &health.HealthStatus{
Status: health.HealthStatusHealthy,
Message: "Standard lib was used",
}
assert.Equal(t, expectedStatus, status)
})
t.Run("Disable Lua standard lib", func(t *testing.T) {
testObj := StrToUnstructured(testSA)
overrides := getHealthOverride(false)
status, err := overrides.GetResourceHealth(testObj)
assert.IsType(t, &lua.ApiError{}, err)
expectedErr := "<string>:4: attempt to index a non-table object(nil) with key 'find'\nstack traceback:\n\t<string>:4: in main chunk\n\t[G]: ?"
assert.EqualError(t, err, expectedErr)
assert.Nil(t, status)
})
}