// @tags: [
//   does_not_support_stepdowns,
//   requires_fastcount,
//   requires_getmore,
//   requires_non_retryable_writes,
// ]

(function() {
"use strict";

const coll = db.or4;
coll.drop();

coll.ensureIndex({a: 1});
coll.ensureIndex({b: 1});

assert.writeOK(coll.insert({a: 2}));
assert.writeOK(coll.insert({b: 3}));
assert.writeOK(coll.insert({b: 3}));
assert.writeOK(coll.insert({a: 2, b: 3}));

assert.eq(4, coll.count({$or: [{a: 2}, {b: 3}]}));
assert.eq(2, coll.count({$or: [{a: 2}, {a: 2}]}));

assert.eq(2, coll.find({}).skip(2).count(true));
assert.eq(2, coll.find({$or: [{a: 2}, {b: 3}]}).skip(2).count(true));
assert.eq(1, coll.find({$or: [{a: 2}, {b: 3}]}).skip(3).count(true));

assert.eq(2, coll.find({}).limit(2).count(true));
assert.eq(1, coll.find({$or: [{a: 2}, {b: 3}]}).limit(1).count(true));
assert.eq(2, coll.find({$or: [{a: 2}, {b: 3}]}).limit(2).count(true));
assert.eq(3, coll.find({$or: [{a: 2}, {b: 3}]}).limit(3).count(true));
assert.eq(4, coll.find({$or: [{a: 2}, {b: 3}]}).limit(4).count(true));

coll.remove({$or: [{a: 2}, {b: 3}]});
assert.eq(0, coll.count());

assert.writeOK(coll.insert({b: 3}));
coll.remove({$or: [{a: 2}, {b: 3}]});
assert.eq(0, coll.count());

assert.writeOK(coll.insert({a: 2}));
assert.writeOK(coll.insert({b: 3}));
assert.writeOK(coll.insert({a: 2, b: 3}));

coll.update({$or: [{a: 2}, {b: 3}]}, {$set: {z: 1}}, false, true);
assert.eq(3, coll.count({z: 1}));

assert.eq(3, coll.find({$or: [{a: 2}, {b: 3}]}).toArray().length);
assert.eq(coll.find().sort({_id: 1}).toArray(),
          coll.find({$or: [{a: 2}, {b: 3}]}).sort({_id: 1}).toArray());
assert.eq(2, coll.find({$or: [{a: 2}, {b: 3}]}).skip(1).toArray().length);

assert.eq(3, coll.find({$or: [{a: 2}, {b: 3}]}).batchSize(2).toArray().length);

assert.writeOK(coll.insert({a: 1}));
assert.writeOK(coll.insert({b: 4}));
assert.writeOK(coll.insert({a: 2}));

assert.eq(4, coll.find({$or: [{a: 2}, {b: 3}]}).batchSize(2).toArray().length);

assert.writeOK(coll.insert({a: 1, b: 3}));
assert.eq(4, coll.find({$or: [{a: 2}, {b: 3}]}).limit(4).toArray().length);

assert.eq([1, 2], Array.sort(coll.distinct('a', {$or: [{a: 2}, {b: 3}]})));

assert.eq(5,
          coll.mapReduce(
                  function() {
                      emit('a', this.a);
                  },
                  function(key, vals) {
                      return vals.length;
                  },
                  {out: {inline: true}, query: {$or: [{a: 2}, {b: 3}]}})
              .counts.input);

coll.remove({});

assert.writeOK(coll.insert({a: [1, 2]}));
assert.eq(1, coll.find({$or: [{a: 1}, {a: 2}]}).toArray().length);
assert.eq(1, coll.count({$or: [{a: 1}, {a: 2}]}));
assert.eq(1, coll.find({$or: [{a: 2}, {a: 1}]}).toArray().length);
assert.eq(1, coll.count({$or: [{a: 2}, {a: 1}]}));
})();