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|
package grpccorrelation
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/labkit/correlation"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
var (
_ grpc.ServerTransportStream = (*mockServerTransportStream)(nil)
_ grpc.ServerStream = (*mockServerStream)(nil)
)
type tcType struct {
name string
md metadata.MD
withoutPropagation bool
expectRandom bool
expectedClientName string
}
func TestServerCorrelationInterceptors(t *testing.T) {
tests := []tcType{
{
name: "default",
md: metadata.Pairs(
metadataCorrelatorKey,
correlationID,
metadataClientNameKey,
clientName,
),
expectedClientName: clientName,
},
{
name: "id present but not trusted",
md: metadata.Pairs(
metadataCorrelatorKey,
correlationID,
),
withoutPropagation: true,
expectRandom: true,
},
{
name: "id present, trusted but empty",
md: metadata.Pairs(
metadataCorrelatorKey,
"",
),
withoutPropagation: true,
expectRandom: true,
},
{
name: "id absent and not trusted",
md: metadata.Pairs(),
withoutPropagation: true,
expectRandom: true,
},
{
name: "id absent and trusted",
md: metadata.Pairs(),
expectRandom: true,
},
{
name: "no metadata",
md: nil,
expectRandom: true,
},
}
t.Run("unary", func(t *testing.T) {
for _, tc := range tests {
t.Run(tc.name, testUnaryServerCorrelationInterceptor(tc, false))
t.Run(tc.name+" (reverse)", testUnaryServerCorrelationInterceptor(tc, true))
}
})
t.Run("streaming", func(t *testing.T) {
for _, tc := range tests {
t.Run(tc.name, testStreamingServerCorrelationInterceptor(tc, false))
t.Run(tc.name+" (reverse)", testStreamingServerCorrelationInterceptor(tc, true))
}
})
}
func testUnaryServerCorrelationInterceptor(tc tcType, reverseCorrelationID bool) func(*testing.T) {
return func(t *testing.T) {
t.Helper()
sts := &mockServerTransportStream{}
ctx := grpc.NewContextWithServerTransportStream(context.Background(), sts)
if tc.md != nil {
ctx = metadata.NewIncomingContext(ctx, tc.md)
}
interceptor := UnaryServerCorrelationInterceptor(constructServerOpts(tc, reverseCorrelationID)...)
_, err := interceptor(
ctx,
nil,
nil,
func(ctx context.Context, req interface{}) (interface{}, error) {
testServerCtx(ctx, t, tc, reverseCorrelationID, sts.header)
return nil, nil
},
)
require.NoError(t, err)
}
}
func testStreamingServerCorrelationInterceptor(tc tcType, reverseCorrelationID bool) func(*testing.T) {
return func(t *testing.T) {
t.Helper()
ctx := context.Background()
if tc.md != nil {
ctx = metadata.NewIncomingContext(ctx, tc.md)
}
ss := &mockServerStream{
ctx: ctx,
}
interceptor := StreamServerCorrelationInterceptor(constructServerOpts(tc, reverseCorrelationID)...)
err := interceptor(
nil,
ss,
nil,
func(srv interface{}, stream grpc.ServerStream) error {
testServerCtx(stream.Context(), t, tc, reverseCorrelationID, ss.header)
return nil
},
)
require.NoError(t, err)
}
}
func constructServerOpts(tc tcType, reverseCorrelationID bool) []ServerCorrelationInterceptorOption {
var opts []ServerCorrelationInterceptorOption
if tc.withoutPropagation {
opts = append(opts, WithoutPropagation())
}
if reverseCorrelationID {
opts = append(opts, WithReversePropagation())
}
return opts
}
func testServerCtx(ctx context.Context, t *testing.T, tc tcType, reverseCorrelationID bool, header metadata.MD) {
t.Helper()
actualID := correlation.ExtractFromContext(ctx)
if tc.expectRandom {
assert.NotEqual(t, correlationID, actualID)
assert.NotEmpty(t, actualID)
} else {
assert.Equal(t, correlationID, actualID)
}
vals := header.Get(metadataCorrelatorKey)
if reverseCorrelationID {
assert.Equal(t, []string{actualID}, vals)
} else {
assert.Empty(t, vals)
}
assert.Equal(t, tc.expectedClientName, correlation.ExtractClientNameFromContext(ctx))
}
type mockServerTransportStream struct {
header metadata.MD
}
func (s *mockServerTransportStream) Method() string {
panic("implement me")
}
func (s *mockServerTransportStream) SetHeader(md metadata.MD) error {
s.header = metadata.Join(s.header, md)
return nil
}
func (s *mockServerTransportStream) SendHeader(md metadata.MD) error {
panic("implement me")
}
func (s *mockServerTransportStream) SetTrailer(md metadata.MD) error {
panic("implement me")
}
type mockServerStream struct {
ctx context.Context
header metadata.MD
}
func (s *mockServerStream) SetHeader(md metadata.MD) error {
s.header = metadata.Join(s.header, md)
return nil
}
func (s *mockServerStream) SendHeader(md metadata.MD) error {
panic("implement me")
}
func (s *mockServerStream) SetTrailer(md metadata.MD) {
panic("implement me")
}
func (s *mockServerStream) Context() context.Context {
return s.ctx
}
func (s *mockServerStream) SendMsg(m interface{}) error {
panic("implement me")
}
func (s *mockServerStream) RecvMsg(m interface{}) error {
panic("implement me")
}
|
