jstests/sharding/hash_single_shard.js


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// Test hashed presplit with 1 shard.

var st = new ShardingTest({shards: 1});
var testDB = st.getDB('test');

// create hashed shard key and enable sharding
testDB.adminCommand({enablesharding: "test"});
testDB.adminCommand({shardCollection: "test.collection", key: {a: "hashed"}});

// check the number of initial chunks.
assert.eq(2,
          st.getDB('config').chunks.count({"ns": "test.collection"}),
          'Using hashed shard key but failing to do correct presplitting');
st.stop();