Exemplo n.º 1
0
Arquivo: ci.go Projeto: rht/bssim
// IsRunning attempts to determine whether this process is
// running on CI. This is done by checking any of:
//
//  CI=true
//  travis.IsRunning()
//  jenkins.IsRunning()
//
func IsRunning() bool {
	if os.Getenv(string(VarCI)) == "true" {
		return true
	}

	return travis.IsRunning() || jenkins.IsRunning()
}
Exemplo n.º 2
0
func TestDialBackoff(t *testing.T) {
	// t.Skip("skipping for another test")
	if travis.IsRunning() || jenkins.IsRunning() {
		t.Skip("travis and jenkins will never have fun with this test")
	}

	t.Parallel()

	ctx := context.Background()
	swarms := makeSwarms(ctx, t, 2)
	s1 := swarms[0]
	s2 := swarms[1]
	defer s1.Close()
	defer s2.Close()

	s1.dialT = time.Second // lower timeout for tests.
	s2.dialT = time.Second // lower timeout for tests.

	s2addrs, err := s2.InterfaceListenAddresses()
	if err != nil {
		t.Fatal(err)
	}
	s1.peers.AddAddrs(s2.local, s2addrs, peer.PermanentAddrTTL)

	// dial to a non-existent peer.
	s3p, s3addr, s3l := newSilentPeer(t)
	go acceptAndHang(s3l)
	defer s3l.Close()
	s1.peers.AddAddr(s3p, s3addr, peer.PermanentAddrTTL)

	// in this test we will:
	//   1) dial 10x to each node.
	//   2) all dials should hang
	//   3) s1->s2 should succeed.
	//   4) s1->s3 should not (and should place s3 on backoff)
	//   5) disconnect entirely
	//   6) dial 10x to each node again
	//   7) s3 dials should all return immediately (except 1)
	//   8) s2 dials should all hang, and succeed
	//   9) last s3 dial ends, unsuccessful

	dialOnlineNode := func(dst peer.ID, times int) <-chan bool {
		ch := make(chan bool)
		for i := 0; i < times; i++ {
			go func() {
				if _, err := s1.Dial(ctx, dst); err != nil {
					t.Error("error dialing", dst, err)
					ch <- false
				} else {
					ch <- true
				}
			}()
		}
		return ch
	}

	dialOfflineNode := func(dst peer.ID, times int) <-chan bool {
		ch := make(chan bool)
		for i := 0; i < times; i++ {
			go func() {
				if c, err := s1.Dial(ctx, dst); err != nil {
					ch <- false
				} else {
					t.Error("succeeded in dialing", dst)
					ch <- true
					c.Close()
				}
			}()
		}
		return ch
	}

	{
		// 1) dial 10x to each node.
		N := 10
		s2done := dialOnlineNode(s2.local, N)
		s3done := dialOfflineNode(s3p, N)

		// when all dials should be done by:
		dialTimeout1x := time.After(s1.dialT)
		// dialTimeout1Ax := time.After(s1.dialT * 2)       // dialAttempts)
		dialTimeout10Ax := time.After(s1.dialT * 2 * 10) // dialAttempts * 10)

		// 2) all dials should hang
		select {
		case <-s2done:
			t.Error("s2 should not happen immediately")
		case <-s3done:
			t.Error("s3 should not happen yet")
		case <-time.After(time.Millisecond):
			// s2 may finish very quickly, so let's get out.
		}

		// 3) s1->s2 should succeed.
		for i := 0; i < N; i++ {
			select {
			case r := <-s2done:
				if !r {
					t.Error("s2 should not fail")
				}
			case <-s3done:
				t.Error("s3 should not happen yet")
			case <-dialTimeout1x:
				t.Error("s2 took too long")
			}
		}

		select {
		case <-s2done:
			t.Error("s2 should have no more")
		case <-s3done:
			t.Error("s3 should not happen yet")
		case <-dialTimeout1x: // let it pass
		}

		// 4) s1->s3 should not (and should place s3 on backoff)
		// N-1 should finish before dialTimeout1x * 2
		for i := 0; i < N; i++ {
			select {
			case <-s2done:
				t.Error("s2 should have no more")
			case r := <-s3done:
				if r {
					t.Error("s3 should not succeed")
				}
			case <-(dialTimeout1x):
				if i < (N - 1) {
					t.Fatal("s3 took too long")
				}
				t.Log("dialTimeout1x * 1.3 hit for last peer")
			case <-dialTimeout10Ax:
				t.Fatal("s3 took too long")
			}
		}

		// check backoff state
		if s1.backf.Backoff(s2.local) {
			t.Error("s2 should not be on backoff")
		}
		if !s1.backf.Backoff(s3p) {
			t.Error("s3 should be on backoff")
		}

		// 5) disconnect entirely

		for _, c := range s1.Connections() {
			c.Close()
		}
		for i := 0; i < 100 && len(s1.Connections()) > 0; i++ {
			<-time.After(time.Millisecond)
		}
		if len(s1.Connections()) > 0 {
			t.Fatal("s1 conns must exit")
		}
	}

	{
		// 6) dial 10x to each node again
		N := 10
		s2done := dialOnlineNode(s2.local, N)
		s3done := dialOfflineNode(s3p, N)

		// when all dials should be done by:
		dialTimeout1x := time.After(s1.dialT)
		// dialTimeout1Ax := time.After(s1.dialT * 2)       // dialAttempts)
		dialTimeout10Ax := time.After(s1.dialT * 2 * 10) // dialAttempts * 10)

		// 7) s3 dials should all return immediately (except 1)
		for i := 0; i < N-1; i++ {
			select {
			case <-s2done:
				t.Error("s2 should not succeed yet")
			case r := <-s3done:
				if r {
					t.Error("s3 should not succeed")
				}
			case <-dialTimeout1x:
				t.Fatal("s3 took too long")
			}
		}

		// 8) s2 dials should all hang, and succeed
		for i := 0; i < N; i++ {
			select {
			case r := <-s2done:
				if !r {
					t.Error("s2 should succeed")
				}
			// case <-s3done:
			case <-(dialTimeout1x):
				t.Fatal("s3 took too long")
			}
		}

		// 9) the last s3 should return, failed.
		select {
		case <-s2done:
			t.Error("s2 should have no more")
		case r := <-s3done:
			if r {
				t.Error("s3 should not succeed")
			}
		case <-dialTimeout10Ax:
			t.Fatal("s3 took too long")
		}

		// check backoff state (the same)
		if s1.backf.Backoff(s2.local) {
			t.Error("s2 should not be on backoff")
		}
		if !s1.backf.Backoff(s3p) {
			t.Error("s3 should be on backoff")
		}

	}
}