Start of test case.

config_test.go

package fsrepo

import (
	"encoding/json"
	"testing"
	"os"
	"io/ioutil"
	"reflect"

	//"fmt"

	syncmount "gx/ipfs/QmRWDav6mzWseLWeYfVd5fvUKiVe9xNH29YfMF438fG364/go-datastore/syncmount"
	//levelds "gx/ipfs/QmaHHmfEozrrotyhyN44omJouyuEtx6ahddqV6W5yRaUSQ/go-ds-leveldb"
	config "github.com/ipfs/go-ipfs/repo/config"
)

var defaultConfig = []byte(`{
    "StorageMax": "10GB",
    "StorageGCWatermark": 90,
    "GCPeriod": "1h",
    "Spec": {
      "mounts": [
        {
          "child": {
            "path": "blocks",
            "shardFunc": "/repo/flatfs/shard/v1/next-to-last/2",
            "sync": true,
            "type": "flatfs"
          },
          "mountpoint": "/blocks",
          "prefix": "flatfs.datastore",
          "type": "measure"
        },
        {
          "child": {
            "compression": "none",
            "path": "datastore",
            "type": "levelds"
          },
          "mountpoint": "/",
          "prefix": "leveldb.datastore",
          "type": "measure"
        }
      ],
      "type": "mount"
    },
    "HashOnRead": false,
    "BloomFilterSize": 0
}`)

func TestDefaultDatastoreConfig(t *testing.T) {
	config := new(config.Datastore)
	err := json.Unmarshal(defaultConfig, config)
	if err != nil {
		t.Fatal(err)
	}
	dir, err := ioutil.TempDir("", "ipfs-datastore-config-test")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(dir) // clean up
	repo := FSRepo{path: dir}
	ds, err := repo.constructDatastore(config.Spec)
	if err != nil {
		t.Fatal(err)
	}
	mount, ok := ds.(*syncmount.Datastore)
	if !ok {
		t.Fatal("expected mount datastore at top level")
	}
	v := reflect.ValueOf(*mount)
	mounts := make([]string, 2)
	mounts[0] = v.FieldByName("mounts").Index(0).FieldByName("Prefix").FieldByName("string").String()
	mounts[1] = v.FieldByName("mounts").Index(1).FieldByName("Prefix").FieldByName("string").String()
	// check for two mounts, one at "/blocks" that should be a measure datastore
	// and one at "/" that should be leveldb datastore
	println(mounts[0])
	println(mounts[1])
}