rueidis mock

Due to the design of the command builder, it is impossible for users to mock rueidis.Client for testing.

Therefore, rueidis provides an implemented one, based on the gomock, with some helpers to make user writing tests more easily, including command matcher mock.Match, mock.MatchFn and mock.Result for faking redis responses.

Examples

Mock client.Do

package main

import (
	"context"
	"testing"

	"go.uber.org/mock/gomock"
	"github.com/redis/rueidis/mock"
)

func TestWithRueidis(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()

	ctx := context.Background()
	client := mock.NewClient(ctrl)

	client.EXPECT().Do(ctx, mock.Match("GET", "key")).Return(mock.Result(mock.RedisString("val")))
	if v, _ := client.Do(ctx, client.B().Get().Key("key").Build()).ToString(); v != "val" {
		t.Fatalf("unexpected val %v", v)
	}
	client.EXPECT().DoMulti(ctx, mock.Match("GET", "c"), mock.Match("GET", "d")).Return([]rueidis.RedisResult{
		mock.Result(mock.RedisNil()),
		mock.Result(mock.RedisNil()),
	})
	for _, resp := range client.DoMulti(ctx, client.B().Get().Key("c").Build(), client.B().Get().Key("d").Build()) {
		if err := resp.Error(); !rueidis.IsRedisNil(err) {
			t.Fatalf("unexpected err %v", err)
		}
	}
}

Mock client.Receive

package main

import (
	"context"
	"testing"

	"go.uber.org/mock/gomock"
	"github.com/redis/rueidis/mock"
)

func TestWithRueidisReceive(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()

	ctx := context.Background()
	client := mock.NewClient(ctrl)

	client.EXPECT().Receive(ctx, mock.Match("SUBSCRIBE", "ch"), gomock.Any()).Do(func(_, _ any, fn func(message rueidis.PubSubMessage)) {
		fn(rueidis.PubSubMessage{Message: "msg"})
	})

	client.Receive(ctx, client.B().Subscribe().Channel("ch").Build(), func(msg rueidis.PubSubMessage) {
		if msg.Message != "msg" {
			t.Fatalf("unexpected val %v", msg.Message)
		}
	})
}