ooni-probe-cli/internal/netxlite/dialer_test.go

433 lines
10 KiB
Go

package netxlite
import (
"context"
"errors"
"io"
"net"
"strings"
"testing"
"time"
"github.com/apex/log"
"github.com/ooni/probe-cli/v3/internal/netxlite/errorsx"
"github.com/ooni/probe-cli/v3/internal/netxlite/mocks"
)
func TestDialerSystemCloseIdleConnections(t *testing.T) {
d := &dialerSystem{}
d.CloseIdleConnections() // should not crash
}
func TestDialerResolverNoPort(t *testing.T) {
dialer := &dialerResolver{Dialer: defaultDialer, Resolver: DefaultResolver}
conn, err := dialer.DialContext(context.Background(), "tcp", "ooni.nu")
if err == nil || !strings.HasSuffix(err.Error(), "missing port in address") {
t.Fatal("not the error we expected", err)
}
if conn != nil {
t.Fatal("expected a nil conn here")
}
}
func TestDialerResolverLookupHostAddress(t *testing.T) {
dialer := &dialerResolver{Dialer: defaultDialer, Resolver: &mocks.Resolver{
MockLookupHost: func(ctx context.Context, domain string) ([]string, error) {
return nil, errors.New("we should not call this function")
},
}}
addrs, err := dialer.lookupHost(context.Background(), "1.1.1.1")
if err != nil {
t.Fatal(err)
}
if len(addrs) != 1 || addrs[0] != "1.1.1.1" {
t.Fatal("not the result we expected")
}
}
func TestDialerResolverLookupHostFailure(t *testing.T) {
expected := errors.New("mocked error")
dialer := &dialerResolver{Dialer: defaultDialer, Resolver: &mocks.Resolver{
MockLookupHost: func(ctx context.Context, domain string) ([]string, error) {
return nil, expected
},
}}
ctx := context.Background()
conn, err := dialer.DialContext(ctx, "tcp", "dns.google.com:853")
if !errors.Is(err, expected) {
t.Fatal("not the error we expected", err)
}
if conn != nil {
t.Fatal("expected nil conn")
}
}
func TestDialerResolverDialForSingleIPFails(t *testing.T) {
dialer := &dialerResolver{Dialer: &mocks.Dialer{
MockDialContext: func(ctx context.Context, network string, address string) (net.Conn, error) {
return nil, io.EOF
},
}, Resolver: DefaultResolver}
conn, err := dialer.DialContext(context.Background(), "tcp", "1.1.1.1:853")
if !errors.Is(err, io.EOF) {
t.Fatal("not the error we expected")
}
if conn != nil {
t.Fatal("expected nil conn")
}
}
func TestDialerResolverDialForManyIPFails(t *testing.T) {
dialer := &dialerResolver{
Dialer: &mocks.Dialer{
MockDialContext: func(ctx context.Context, network string, address string) (net.Conn, error) {
return nil, io.EOF
},
}, Resolver: &mocks.Resolver{
MockLookupHost: func(ctx context.Context, domain string) ([]string, error) {
return []string{"1.1.1.1", "8.8.8.8"}, nil
},
}}
conn, err := dialer.DialContext(context.Background(), "tcp", "dot.dns:853")
if !errors.Is(err, io.EOF) {
t.Fatal("not the error we expected")
}
if conn != nil {
t.Fatal("expected nil conn")
}
}
func TestDialerResolverDialForManyIPSuccess(t *testing.T) {
dialer := &dialerResolver{Dialer: &mocks.Dialer{
MockDialContext: func(ctx context.Context, network string, address string) (net.Conn, error) {
return &mocks.Conn{
MockClose: func() error {
return nil
},
}, nil
},
}, Resolver: &mocks.Resolver{
MockLookupHost: func(ctx context.Context, domain string) ([]string, error) {
return []string{"1.1.1.1", "8.8.8.8"}, nil
},
}}
conn, err := dialer.DialContext(context.Background(), "tcp", "dot.dns:853")
if err != nil {
t.Fatal("expected nil error here")
}
if conn == nil {
t.Fatal("expected non-nil conn")
}
conn.Close()
}
func TestDialerResolverCloseIdleConnections(t *testing.T) {
var (
calledDialer bool
calledResolver bool
)
d := &dialerResolver{
Dialer: &mocks.Dialer{
MockCloseIdleConnections: func() {
calledDialer = true
},
},
Resolver: &mocks.Resolver{
MockCloseIdleConnections: func() {
calledResolver = true
},
},
}
d.CloseIdleConnections()
if !calledDialer || !calledResolver {
t.Fatal("not called")
}
}
func TestDialerLoggerSuccess(t *testing.T) {
d := &dialerLogger{
Dialer: &mocks.Dialer{
MockDialContext: func(ctx context.Context, network string, address string) (net.Conn, error) {
return &mocks.Conn{
MockClose: func() error {
return nil
},
}, nil
},
},
Logger: log.Log,
}
conn, err := d.DialContext(context.Background(), "tcp", "www.google.com:443")
if err != nil {
t.Fatal(err)
}
if conn == nil {
t.Fatal("expected non-nil conn here")
}
conn.Close()
}
func TestDialerLoggerFailure(t *testing.T) {
d := &dialerLogger{
Dialer: &mocks.Dialer{
MockDialContext: func(ctx context.Context, network string, address string) (net.Conn, error) {
return nil, io.EOF
},
},
Logger: log.Log,
}
conn, err := d.DialContext(context.Background(), "tcp", "www.google.com:443")
if !errors.Is(err, io.EOF) {
t.Fatal("not the error we expected")
}
if conn != nil {
t.Fatal("expected nil conn here")
}
}
func TestDialerLoggerCloseIdleConnections(t *testing.T) {
var (
calledDialer bool
)
d := &dialerLogger{
Dialer: &mocks.Dialer{
MockCloseIdleConnections: func() {
calledDialer = true
},
},
}
d.CloseIdleConnections()
if !calledDialer {
t.Fatal("not called")
}
}
func TestUnderlyingDialerHasTimeout(t *testing.T) {
expected := 15 * time.Second
if underlyingDialer.Timeout != expected {
t.Fatal("unexpected timeout value")
}
}
func TestNewDialerWithoutResolverChain(t *testing.T) {
dlr := NewDialerWithoutResolver(log.Log)
dlog, okay := dlr.(*dialerLogger)
if !okay {
t.Fatal("invalid type")
}
if dlog.Logger != log.Log {
t.Fatal("invalid logger")
}
dreso, okay := dlog.Dialer.(*dialerResolver)
if !okay {
t.Fatal("invalid type")
}
if _, okay := dreso.Resolver.(*nullResolver); !okay {
t.Fatal("invalid Resolver type")
}
dlog, okay = dreso.Dialer.(*dialerLogger)
if !okay {
t.Fatal("invalid type")
}
if dlog.Logger != log.Log {
t.Fatal("invalid logger")
}
dew, okay := dlog.Dialer.(*dialerErrWrapper)
if !okay {
t.Fatal("invalid type")
}
if _, okay := dew.Dialer.(*dialerSystem); !okay {
t.Fatal("invalid type")
}
}
func TestNewSingleUseDialerWorksAsIntended(t *testing.T) {
conn := &mocks.Conn{}
d := NewSingleUseDialer(conn)
outconn, err := d.DialContext(context.Background(), "", "")
if err != nil {
t.Fatal(err)
}
if conn != outconn {
t.Fatal("invalid outconn")
}
for i := 0; i < 4; i++ {
outconn, err = d.DialContext(context.Background(), "", "")
if !errors.Is(err, ErrNoConnReuse) {
t.Fatal("not the error we expected", err)
}
if outconn != nil {
t.Fatal("expected nil outconn here")
}
}
}
func TestDialerErrWrapper(t *testing.T) {
t.Run("DialContext on success", func(t *testing.T) {
t.Run("on success", func(t *testing.T) {
expectedConn := &mocks.Conn{}
d := &dialerErrWrapper{
Dialer: &mocks.Dialer{
MockDialContext: func(ctx context.Context, network, address string) (net.Conn, error) {
return expectedConn, nil
},
},
}
ctx := context.Background()
conn, err := d.DialContext(ctx, "", "")
if err != nil {
t.Fatal(err)
}
errWrapperConn := conn.(*dialerErrWrapperConn)
if errWrapperConn.Conn != expectedConn {
t.Fatal("unexpected conn")
}
})
t.Run("on failure", func(t *testing.T) {
expectedErr := io.EOF
d := &dialerErrWrapper{
Dialer: &mocks.Dialer{
MockDialContext: func(ctx context.Context, network, address string) (net.Conn, error) {
return nil, expectedErr
},
},
}
ctx := context.Background()
conn, err := d.DialContext(ctx, "", "")
if err == nil || err.Error() != errorsx.FailureEOFError {
t.Fatal("unexpected err", err)
}
if conn != nil {
t.Fatal("expected nil conn")
}
})
})
t.Run("CloseIdleConnections", func(t *testing.T) {
var called bool
d := &dialerErrWrapper{
Dialer: &mocks.Dialer{
MockCloseIdleConnections: func() {
called = true
},
},
}
d.CloseIdleConnections()
if !called {
t.Fatal("not called")
}
})
}
func TestDialerErrWrapperConn(t *testing.T) {
t.Run("Read", func(t *testing.T) {
t.Run("on success", func(t *testing.T) {
b := make([]byte, 128)
conn := &dialerErrWrapperConn{
Conn: &mocks.Conn{
MockRead: func(b []byte) (int, error) {
return len(b), nil
},
},
}
count, err := conn.Read(b)
if err != nil {
t.Fatal(err)
}
if count != len(b) {
t.Fatal("unexpected count")
}
})
t.Run("on failure", func(t *testing.T) {
b := make([]byte, 128)
expectedErr := io.EOF
conn := &dialerErrWrapperConn{
Conn: &mocks.Conn{
MockRead: func(b []byte) (int, error) {
return 0, expectedErr
},
},
}
count, err := conn.Read(b)
if err == nil || err.Error() != errorsx.FailureEOFError {
t.Fatal("unexpected err", err)
}
if count != 0 {
t.Fatal("unexpected count")
}
})
})
t.Run("Write", func(t *testing.T) {
t.Run("on success", func(t *testing.T) {
b := make([]byte, 128)
conn := &dialerErrWrapperConn{
Conn: &mocks.Conn{
MockWrite: func(b []byte) (int, error) {
return len(b), nil
},
},
}
count, err := conn.Write(b)
if err != nil {
t.Fatal(err)
}
if count != len(b) {
t.Fatal("unexpected count")
}
})
t.Run("on failure", func(t *testing.T) {
b := make([]byte, 128)
expectedErr := io.EOF
conn := &dialerErrWrapperConn{
Conn: &mocks.Conn{
MockWrite: func(b []byte) (int, error) {
return 0, expectedErr
},
},
}
count, err := conn.Write(b)
if err == nil || err.Error() != errorsx.FailureEOFError {
t.Fatal("unexpected err", err)
}
if count != 0 {
t.Fatal("unexpected count")
}
})
})
t.Run("Close", func(t *testing.T) {
t.Run("on success", func(t *testing.T) {
conn := &dialerErrWrapperConn{
Conn: &mocks.Conn{
MockClose: func() error {
return nil
},
},
}
err := conn.Close()
if err != nil {
t.Fatal(err)
}
})
t.Run("on failure", func(t *testing.T) {
expectedErr := io.EOF
conn := &dialerErrWrapperConn{
Conn: &mocks.Conn{
MockClose: func() error {
return expectedErr
},
},
}
err := conn.Close()
if err == nil || err.Error() != errorsx.FailureEOFError {
t.Fatal("unexpected err", err)
}
})
})
}