3828: Wait for listener to start before connecting to it. Fix test

[arvados.git] / services / keepproxy / keepproxy_test.go

diff --git a/services/keepproxy/keepproxy_test.go b/services/keepproxy/keepproxy_test.go
index c4e5ae7258f0963093232f78877820ed15c0296c..f6d163c1f19fe7449adb764f7d98f728438b3fa8 100644 (file)
--- a/services/keepproxy/keepproxy_test.go
+++ b/services/keepproxy/keepproxy_test.go
@@ -34,6 +34,25 @@ func pythonDir() string {
        return fmt.Sprintf("%s/../../sdk/python/tests", cwd)
 }
 
+// Wait (up to 1 second) for keepproxy to listen on a port. This
+// avoids a race condition where we hit a "connection refused" error
+// because we start testing the proxy too soon.
+func waitForListener() {
+       const (ms = 5)
+       for i := 0; listener == nil && i < 1000; i += ms {
+               time.Sleep(ms * time.Millisecond)
+       }
+       if listener == nil {
+               log.Fatalf("Timed out waiting for listener to start")
+       }
+}
+
+func closeListener() {
+       if listener != nil {
+               listener.Close()
+       }
+}
+
 func (s *ServerRequiredSuite) SetUpSuite(c *C) {
        cwd, _ := os.Getwd()
        defer os.Chdir(cwd)
@@ -62,7 +81,7 @@ func (s *ServerRequiredSuite) SetUpSuite(c *C) {
                }
        }
 
-       os.Setenv("ARVADOS_API_HOST", "localhost:3001")
+       os.Setenv("ARVADOS_API_HOST", "localhost:3000")
        os.Setenv("ARVADOS_API_TOKEN", "4axaw8zxe0qm22wa6urpp5nskcne8z88cvbupv653y1njyi05h")
        os.Setenv("ARVADOS_API_HOST_INSECURE", "true")
 }
@@ -155,7 +174,8 @@ func (s *ServerRequiredSuite) TestPutAskGet(c *C) {
        os.Setenv("ARVADOS_EXTERNAL_CLIENT", "")
        log.Print("keepclient created")
 
-       defer listener.Close()
+       waitForListener()
+       defer closeListener()
 
        hash := fmt.Sprintf("%x", md5.Sum([]byte("foo")))
        var hash2 string
@@ -199,7 +219,8 @@ func (s *ServerRequiredSuite) TestPutAskGetForbidden(c *C) {
        log.Print("TestPutAndGet start")
 
        kc := runProxy(c, []string{"keepproxy"}, "123abc", 29951)
-       defer listener.Close()
+       waitForListener()
+       defer closeListener()
 
        log.Print("keepclient created")
 
@@ -240,7 +261,8 @@ func (s *ServerRequiredSuite) TestGetDisabled(c *C) {
        log.Print("TestGetDisabled start")
 
        kc := runProxy(c, []string{"keepproxy", "-no-get"}, "4axaw8zxe0qm22wa6urpp5nskcne8z88cvbupv653y1njyi05h", 29952)
-       defer listener.Close()
+       waitForListener()
+       defer closeListener()
 
        hash := fmt.Sprintf("%x", md5.Sum([]byte("baz")))
 
@@ -279,7 +301,8 @@ func (s *ServerRequiredSuite) TestPutDisabled(c *C) {
        log.Print("TestPutDisabled start")
 
        kc := runProxy(c, []string{"keepproxy", "-no-put"}, "4axaw8zxe0qm22wa6urpp5nskcne8z88cvbupv653y1njyi05h", 29953)
-       defer listener.Close()
+       waitForListener()
+       defer closeListener()
 
        {
                hash2, rep, err := kc.PutB([]byte("quux"))