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//
// Tests that we can only merge empty chunks
//
var options = { separateConfig : true, shardOptions : { verbose : 0 } };
var st = new ShardingTest({ shards : 2, mongos : 2, other : options });
st.stopBalancer();
var mongos = st.s0;
var staleMongos = st.s1;
var admin = mongos.getDB( "admin" );
var shards = mongos.getCollection( "config.shards" ).find().toArray();
var coll = mongos.getCollection( "foo.bar" );
assert( admin.runCommand({ enableSharding : coll.getDB() + "" }).ok );
printjson( admin.runCommand({ movePrimary : coll.getDB() + "", to : shards[0]._id }) );
assert( admin.runCommand({ shardCollection : coll + "", key : { _id : 1 } }).ok );
// Create ranges MIN->0, 0->10,10->20, 20->30,30->40, 40->50,50->60, 60->MAX
jsTest.log( "Creating ranges..." );
assert( admin.runCommand({ split : coll + "", middle : { _id : 0 } }).ok );
assert( admin.runCommand({ split : coll + "", middle : { _id : 10 } }).ok );
assert( admin.runCommand({ split : coll + "", middle : { _id : 20 } }).ok );
assert( admin.runCommand({ split : coll + "", middle : { _id : 30 } }).ok );
assert( admin.runCommand({ split : coll + "", middle : { _id : 40 } }).ok );
assert( admin.runCommand({ split : coll + "", middle : { _id : 50 } }).ok );
assert( admin.runCommand({ split : coll + "", middle : { _id : 60 } }).ok );
st.printShardingStatus();
// Insert data to allow 0->20 and 40->60 to be merged, but too much for 20->40
assert.writeOK(coll.insert({ _id : 0 }));
assert.writeOK(coll.insert({ _id : 20 }));
assert.writeOK(coll.insert({ _id : 30 }));
assert.writeOK(coll.insert({ _id : 40 }));
jsTest.log( "Merging chunks with another empty chunk..." );
assert( admin.runCommand({ mergeChunks : coll + "",
bounds : [{ _id : 0 }, { _id : 20 }] }).ok );
assert( admin.runCommand({ mergeChunks : coll + "",
bounds : [{ _id : 40 }, { _id : 60 }] }).ok );
jsTest.log( "Merging two full chunks should fail..." );
assert( !admin.runCommand({ mergeChunks : coll + "",
bounds : [{ _id : 20 }, { _id : 40 }] }).ok );
st.printShardingStatus();
st.stop();
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