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/**
* Test regex options in a find context.
* @tags: [requires_fcv_51]
*/
(function() {
'use strict';
const coll = db.jstests_regex_options;
coll.drop();
assert.commandWorked(coll.insert({a: 'foo'}));
assert.eq(1, coll.count({a: {$regex: /O/i}}));
assert.eq(1, coll.count({a: /O/i}));
assert.eq(1, coll.count({a: {$regex: 'O', $options: 'i'}}));
// Test with various invalid options and make sure they aren't ignored.
// After SERVER-26991 the u flag should no longer be considered invalid.
coll.drop();
assert.commandWorked(coll.insert({txt: 'hello_test'}));
// Test valid/invalid options.
assert.eq(1, coll.count({txt: {$regex: '^hello.*'}}));
assert.eq(1, coll.count({txt: {$regex: '^hello.*', $options: 'u'}}));
assert.commandFailedWithCode(
assert.throws(() => coll.count({txt: {$regex: '^hello.*', $options: 'g'}})), 51108);
// Test using regex object.
assert.eq(1, coll.count({txt: {$regex: /^hello.*/}}));
assert.eq(1, coll.count({txt: {$regex: /^hello.*/u}}));
assert.commandFailedWithCode(assert.throws(() => coll.count({txt: {$regex: /^hello.*/g}})), 51108);
// Test in projection.
assert.eq(1, coll.find({}, {p: {$regexFind: {input: '$txt', regex: /^hello.*/}}}).toArray().length);
assert.eq(1,
coll.find({}, {p: {$regexFind: {input: '$txt', regex: /^hello.*/u}}}).toArray().length);
assert.commandFailedWithCode(
assert.throws(() => coll.find({}, {p: {$regexFind: {input: '$txt', regex: /^hello.*/g}}})
.itcount()),
51108);
})();
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