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// Copyright (c) The go-grpc-middleware Authors.
// Licensed under the Apache License 2.0.
package selector
import (
"context"
"errors"
"testing"
"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors"
"github.com/stretchr/testify/assert"
"google.golang.org/grpc"
)
// allow matches only given methods.
func allow(methods []string) Matcher {
return MatchFunc(func(ctx context.Context, c interceptors.CallMeta) bool {
for _, s := range methods {
if s == c.FullMethod() {
return true
}
}
return false
})
}
type mockGRPCServerStream struct {
grpc.ServerStream
ctx context.Context
}
func (m *mockGRPCServerStream) Context() context.Context {
return m.ctx
}
const svcMethod = "/v1beta1.SomeService/NeedsAuth"
func TestUnaryServerInterceptor(t *testing.T) {
interceptor := UnaryServerInterceptor(
func(context.Context, any, *grpc.UnaryServerInfo, grpc.UnaryHandler) (any, error) {
return nil, errors.New("always error")
}, allow([]string{svcMethod}),
)
handler := func(ctx context.Context, req any) (any, error) {
return "good", nil
}
t.Run("not-selected", func(t *testing.T) {
info := &grpc.UnaryServerInfo{
FullMethod: "FakeMethod",
}
resp, err := interceptor(context.Background(), nil, info, handler)
assert.Nil(t, err)
assert.Equal(t, resp, "good")
})
t.Run("selected", func(t *testing.T) {
info := &grpc.UnaryServerInfo{
FullMethod: svcMethod,
}
resp, err := interceptor(context.Background(), nil, info, handler)
assert.Nil(t, resp)
assert.EqualError(t, err, "always error")
})
}
func TestStreamServerInterceptor(t *testing.T) {
interceptor := StreamServerInterceptor(
func(srv any, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
return errors.New("always error")
},
allow([]string{svcMethod}),
)
handler := func(srv any, stream grpc.ServerStream) error {
return nil
}
t.Run("not-selected", func(t *testing.T) {
info := &grpc.StreamServerInfo{
FullMethod: "FakeMethod",
}
err := interceptor(nil, &mockGRPCServerStream{ctx: context.Background()}, info, handler)
assert.Nil(t, err)
})
t.Run("slected", func(t *testing.T) {
info := &grpc.StreamServerInfo{
FullMethod: svcMethod,
}
err := interceptor(nil, &mockGRPCServerStream{ctx: context.Background()}, info, handler)
assert.EqualError(t, err, "always error")
})
}
func TestAllow(t *testing.T) {
type args struct {
methods []string
}
tests := []struct {
name string
args args
method string
want bool
}{
{
name: "false",
args: args{
methods: []string{"/auth.v1beta1.AuthService/Login"},
},
method: "/testing.testpb.v1.TestService/PingList",
want: false,
},
{
name: "true",
args: args{
methods: []string{"/auth.v1beta1.AuthService/Login"},
},
method: "/auth.v1beta1.AuthService/Login",
want: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
allow := allow(tt.args.methods)
want := allow.Match(context.Background(), interceptors.NewServerCallMeta(tt.method, nil, nil))
assert.Equalf(t, tt.want, want, "Allow(%v)(ctx, %v)", tt.args.methods, tt.method)
})
}
}
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