You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: core_internal_test.go
    path of file: ./repos/revive/revivelib
    
    the code of the file until where you have to start completion: package revivelib

import (
	"testing"

	"github.com/mgechev/revive/config"
	"github.com/mgechev/revive/lint"
)

func TestReviveCreateInstance(t *testing.T) {
	revive := getMockRevive(t)

	if revive.config == nil {
		t.Fatal(
    
func TestReviveCreateInstance(t *testing.T) {
	revive := getMockRevive(t)

	if revive.config == nil {
		t.Fatal("Could not load config.")
	}

	if revive.maxOpenFiles != 2048 {
		t.Fatal("Expected MaxOpenFiles to be 2048")
	}

	if revive.lintingRules == nil || len(revive.lintingRules) == 0 {
		t.Fatal("Linting rules not loaded.")
	}

	rules := map[string]lint.Rule{}
	for _, rule := range revive.lintingRules {
		rules[rule.Name()] = rule
	}

	if _, ok := rules["mock-rule"]; !ok {
		t.Fatal("Didn't load mock rule.")
	}

	if revive.config.ErrorCode != 1 && revive.config.WarningCode != 1 {
		t.Fatal("Didn't set the codes in the config instance.")
	}
}