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t = db.group2;
t.drop();
t.save({a: 2});
t.save({b: 5});
t.save({a: 1});
cmd = { key: {a: 1},
initial: {count: 0},
reduce: function(obj, prev) {
prev.count++;
}
};
result = t.group(cmd);
assert.eq(3, result.length, "A");
assert.eq(null, result[1].a, "C");
assert("a" in result[1], "D");
assert.eq(1, result[2].a, "E");
assert.eq(1, result[0].count, "F");
assert.eq(1, result[1].count, "G");
assert.eq(1, result[2].count, "H");
delete cmd.key
cmd["$keyf"] = function(x){ return { a : x.a }; };
result2 = t.group( cmd );
assert.eq( result , result2 );
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