github.com/mendersoftware/go-lib-micro@v0.0.0-20240304135804-e8e39c59b148/mongo/testing/db.go (about)

     1  // Copyright 2023 Northern.tech AS
     2  //
     3  //	Licensed under the Apache License, Version 2.0 (the "License");
     4  //	you may not use this file except in compliance with the License.
     5  //	You may obtain a copy of the License at
     6  //
     7  //	    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  //	Unless required by applicable law or agreed to in writing, software
    10  //	distributed under the License is distributed on an "AS IS" BASIS,
    11  //	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  //	See the License for the specific language governing permissions and
    13  //	limitations under the License.
    14  
    15  package testing
    16  
    17  import (
    18  	"context"
    19  	"io/ioutil"
    20  	"os"
    21  
    22  	"github.com/mendersoftware/go-lib-micro/mongo/dbtest"
    23  	"go.mongodb.org/mongo-driver/mongo"
    24  	"go.mongodb.org/mongo-driver/mongo/options"
    25  )
    26  
    27  // TestDBRunner exports selected calls of dbtest.DBServer API, just the ones
    28  // that are useful in tests.
    29  type TestDBRunner interface {
    30  	Client() *mongo.Client
    31  	Wipe()
    32  	CTX() context.Context
    33  }
    34  
    35  // WithDB will set up a test DB instance and pass it to `f` callback as
    36  // `dbtest`. Once `f()` is finished, the DB will be cleaned up. Value returned
    37  // from `f()` is obtained as return status of a call to WithDB().
    38  func WithDB(f func(dbtest TestDBRunner) int) int {
    39  	var runner TestDBRunner
    40  	if url, ok := os.LookupEnv("TEST_MONGO_URL"); ok {
    41  		clientOpts := options.Client().
    42  			ApplyURI(url)
    43  		client, err := mongo.Connect(context.Background(), clientOpts)
    44  		if err != nil {
    45  			panic(err)
    46  		}
    47  		runner = (*dbClientFromEnv)(client)
    48  	} else {
    49  		// Fallback to running mongod on host
    50  		dbdir, _ := ioutil.TempDir("", "dbsetup-test")
    51  		db := &dbtest.DBServer{}
    52  		db.SetPath(dbdir)
    53  		runner = db
    54  
    55  		defer os.RemoveAll(dbdir)
    56  		defer db.Stop()
    57  
    58  	}
    59  
    60  	return f(runner)
    61  }