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// @tags: [requires_non_retryable_writes]
// Check that $nin is the opposite of $in SERVER-3264
t = db.jstests_nin2;
t.drop();
// Check various operator types.
function checkOperators(array, inMatches) {
inCount = inMatches ? 1 : 0;
notInCount = 1 - inCount;
assert.eq(inCount, t.count({foo: {$in: array}}));
assert.eq(notInCount, t.count({foo: {$not: {$in: array}}}));
assert.eq(notInCount, t.count({foo: {$nin: array}}));
assert.eq(inCount, t.count({foo: {$not: {$nin: array}}}));
}
t.save({});
assert.eq(1, t.count({foo: null}));
assert.eq(0, t.count({foo: {$ne: null}}));
assert.eq(0, t.count({foo: 1}));
// Check matching null against missing field.
checkOperators([null], true);
checkOperators([null, 1], true);
checkOperators([1, null], true);
t.remove({});
t.save({foo: null});
assert.eq(1, t.count({foo: null}));
assert.eq(0, t.count({foo: {$ne: null}}));
assert.eq(0, t.count({foo: 1}));
// Check matching empty set.
checkOperators([], false);
// Check matching null against missing null field.
checkOperators([null], true);
checkOperators([null, 1], true);
checkOperators([1, null], true);
t.remove({});
t.save({foo: 1});
assert.eq(0, t.count({foo: null}));
assert.eq(1, t.count({foo: {$ne: null}}));
assert.eq(1, t.count({foo: 1}));
// Check matching null against 1.
checkOperators([null], false);
checkOperators([null, 1], true);
checkOperators([1, null], true);
t.remove({});
t.save({foo: [0, 1]});
// Check exact match of embedded array.
checkOperators([[0, 1]], true);
t.remove({});
t.save({foo: []});
// Check exact match of embedded empty array.
checkOperators([[]], true);
t.remove({});
t.save({foo: 'foo'});
// Check regex match.
checkOperators([/o/], true);
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