db.collection.insert({words: "test"})
db.collection.ensureIndex({ words: 'text'})
db.collection.runCommand('text', {search: "test"})
{
  "queryDebugString": "test||||||",
  "language": "english",
  "results": [
    {
      "score": 1.1,
      "obj": {
        "_id": ObjectId("51a50462a2414ab2f8ebcfae"),
        "words": "test"
      }
    }
  ],
  "stats": {
    "nscanned": 1,
    "nscannedObjects": 0,
    "n": 1,
    "nfound": 1,
    "timeMicros": 75
  },
  "ok": 1
}