health: add more ci cases and fix bugs

tests/util/process.go

@@ -1,22 +1,29 @@
 package util
 
 import (
+	"bytes"
 	"context"
 	"os/exec"
 )
 
 type Process struct {
-	cmd    *exec.Cmd
-	cancel context.CancelFunc
+	cmd         *exec.Cmd
+	cancel      context.CancelFunc
+	errorOutput *bytes.Buffer
+
+	beforeStopHandler func()
 }
 
 func NewProcess(path string, params []string) *Process {
 	ctx, cancel := context.WithCancel(context.Background())
 	cmd := exec.CommandContext(ctx, path, params...)
-	return &Process{
+	p := &Process{
 		cmd:    cmd,
 		cancel: cancel,
 	}
+	p.errorOutput = bytes.NewBufferString("")
+	cmd.Stderr = p.errorOutput
+	return p
 }
 
 func (p *Process) Start() error {
@@ -24,6 +31,17 @@ func (p *Process) Start() error {
 }
 
 func (p *Process) Stop() error {
+	if p.beforeStopHandler != nil {
+		p.beforeStopHandler()
+	}
 	p.cancel()
 	return p.cmd.Wait()
 }
+
+func (p *Process) ErrorOutput() string {
+	return p.errorOutput.String()
+}
+
+func (p *Process) SetBeforeStopHandler(fn func()) {
+	p.beforeStopHandler = fn
+}