fix: add server readiness check to prevent test race condition

- wait for mock HTTP server to be ready before running tests
- prevents flaky test failures due to connection refused errors

Author: jai-deepsource

deepsource/tests/init_test.go

@@ -3,9 +3,11 @@ package tests
 import (
 	"fmt"
 	"log"
+	"net"
 	"net/http"
 	"os"
 	"testing"
+	"time"
 )
 
 var srv *http.Server
@@ -34,4 +36,15 @@ func startMockAPIServer() {
 			panic(fmt.Sprintf("failed to start HTTP mock server with error=%s", err))
 		}
 	}()
+
+	// Wait for server to be ready
+	for i := 0; i < 50; i++ {
+		conn, err := net.Dial("tcp", "localhost:8081")
+		if err == nil {
+			conn.Close()
+			return
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	panic("mock server failed to start within timeout")
 }