Make server tests more robust

commandsnew/server.go

@@ -3,6 +3,7 @@ package commandsnew
 import (
 	"bytes"
 	"context"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -1448,10 +1449,19 @@ func (c *serverCommand) serve() error {
 		// Write a .ready file to disk to signal ready status.
 		// This is where the test is run from.
 		fmt.Println("=======> READY <========")
+		testInfo := map[string]any{
+			"baseURLs": srv.baseURLs,
+		}
+
 		dir := os.Getenv("WORK")
 		if dir != "" {
 			readyFile := filepath.Join(dir, ".ready")
-			err := ioutil.WriteFile(readyFile, []byte("ready"), 0777)
+			// encode the test info as JSON into the .ready file.
+			b, err := json.Marshal(testInfo)
+			if err != nil {
+				return err
+			}
+			err = ioutil.WriteFile(readyFile, b, 0777)
 			if err != nil {
 				return err
 			}