cloudflared-mirror/connection/protocol_test.go

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package connection
import (
"fmt"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
const (
testNoTTL = 0
)
var (
testNamedTunnelConfig = &NamedTunnelConfig{
Credentials: Credentials{
AccountTag: "testAccountTag",
},
}
)
func mockFetcher(percentage int32) PercentageFetcher {
return func() (int32, error) {
return percentage, nil
}
}
func mockFetcherWithError() PercentageFetcher {
return func() (int32, error) {
return 0, fmt.Errorf("failed to fetch precentage")
}
}
type dynamicMockFetcher struct {
percentage int32
err error
}
func (dmf *dynamicMockFetcher) fetch() PercentageFetcher {
return func() (int32, error) {
if dmf.err != nil {
return 0, dmf.err
}
return dmf.percentage, nil
}
}
func TestNewProtocolSelector(t *testing.T) {
tests := []struct {
name string
protocol string
expectedProtocol Protocol
hasFallback bool
expectedFallback Protocol
namedTunnelConfig *NamedTunnelConfig
fetchFunc PercentageFetcher
wantErr bool
}{
{
name: "classic tunnel",
protocol: "h2mux",
expectedProtocol: H2mux,
namedTunnelConfig: nil,
},
{
name: "named tunnel over h2mux",
protocol: "h2mux",
expectedProtocol: H2mux,
namedTunnelConfig: testNamedTunnelConfig,
},
{
name: "named tunnel over http2",
protocol: "http2",
expectedProtocol: HTTP2,
hasFallback: true,
expectedFallback: H2mux,
fetchFunc: mockFetcher(0),
namedTunnelConfig: testNamedTunnelConfig,
},
{
name: "named tunnel http2 disabled",
protocol: "http2",
expectedProtocol: H2mux,
fetchFunc: mockFetcher(-1),
namedTunnelConfig: testNamedTunnelConfig,
},
{
name: "named tunnel auto all http2 disabled",
protocol: "auto",
expectedProtocol: H2mux,
fetchFunc: mockFetcher(-1),
namedTunnelConfig: testNamedTunnelConfig,
},
{
name: "named tunnel auto to h2mux",
protocol: "auto",
expectedProtocol: H2mux,
fetchFunc: mockFetcher(0),
namedTunnelConfig: testNamedTunnelConfig,
},
{
name: "named tunnel auto to http2",
protocol: "auto",
expectedProtocol: HTTP2,
hasFallback: true,
expectedFallback: H2mux,
fetchFunc: mockFetcher(100),
namedTunnelConfig: testNamedTunnelConfig,
},
{
// None named tunnel can only use h2mux, so specifying an unknown protocol is not an error
name: "classic tunnel unknown protocol",
protocol: "unknown",
expectedProtocol: H2mux,
},
{
name: "named tunnel unknown protocol",
protocol: "unknown",
fetchFunc: mockFetcher(100),
namedTunnelConfig: testNamedTunnelConfig,
wantErr: true,
},
{
name: "named tunnel fetch error",
protocol: "unknown",
fetchFunc: mockFetcherWithError(),
namedTunnelConfig: testNamedTunnelConfig,
wantErr: true,
},
}
for _, test := range tests {
selector, err := NewProtocolSelector(test.protocol, test.namedTunnelConfig, test.fetchFunc, testNoTTL, &log)
if test.wantErr {
assert.Error(t, err, fmt.Sprintf("test %s failed", test.name))
} else {
assert.NoError(t, err, fmt.Sprintf("test %s failed", test.name))
assert.Equal(t, test.expectedProtocol, selector.Current(), fmt.Sprintf("test %s failed", test.name))
fallback, ok := selector.Fallback()
assert.Equal(t, test.hasFallback, ok, fmt.Sprintf("test %s failed", test.name))
if test.hasFallback {
assert.Equal(t, test.expectedFallback, fallback, fmt.Sprintf("test %s failed", test.name))
}
}
}
}
func TestAutoProtocolSelectorRefresh(t *testing.T) {
fetcher := dynamicMockFetcher{}
selector, err := NewProtocolSelector("auto", testNamedTunnelConfig, fetcher.fetch(), testNoTTL, &log)
assert.NoError(t, err)
assert.Equal(t, H2mux, selector.Current())
fetcher.percentage = 100
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = 0
assert.Equal(t, H2mux, selector.Current())
fetcher.percentage = 100
assert.Equal(t, HTTP2, selector.Current())
fetcher.err = fmt.Errorf("failed to fetch")
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = -1
fetcher.err = nil
assert.Equal(t, H2mux, selector.Current())
fetcher.percentage = 0
assert.Equal(t, H2mux, selector.Current())
fetcher.percentage = 100
assert.Equal(t, HTTP2, selector.Current())
}
func TestHTTP2ProtocolSelectorRefresh(t *testing.T) {
fetcher := dynamicMockFetcher{}
selector, err := NewProtocolSelector("http2", testNamedTunnelConfig, fetcher.fetch(), testNoTTL, &log)
assert.NoError(t, err)
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = 100
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = 0
assert.Equal(t, HTTP2, selector.Current())
fetcher.err = fmt.Errorf("failed to fetch")
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = -1
fetcher.err = nil
assert.Equal(t, H2mux, selector.Current())
fetcher.percentage = 0
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = 100
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = -1
assert.Equal(t, H2mux, selector.Current())
}
func TestProtocolSelectorRefreshTTL(t *testing.T) {
fetcher := dynamicMockFetcher{percentage: 100}
selector, err := NewProtocolSelector("auto", testNamedTunnelConfig, fetcher.fetch(), time.Hour, &log)
assert.NoError(t, err)
assert.Equal(t, HTTP2, selector.Current())
fetcher.percentage = 0
assert.Equal(t, HTTP2, selector.Current())
}