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// ensure $add asserts on string
load('jstests/aggregation/extras/utils.js');
c = db.s6570;
c.drop();
c.save({x:17, y:"foo"});
assertErrorCode(c, {$project:{string_fields : { $add:[3, "$y", 4, "$y"] }}}, 16554);
assertErrorCode(c, {$project:{number_fields : { $add:["a", "$x", "b", "$x"] }}}, 16554);
assertErrorCode(c, {$project:{all_strings : { $add:["c", "$y", "d", "$y"] }}}, 16554);
assertErrorCode(c, {$project:{potpourri_1 : { $add:[5, "$y", "e", "$x"] }}}, 16554);
assertErrorCode(c, {$project:{potpourri_2 : { $add:[6, "$x", "f", "$y"] }}}, 16554);
assertErrorCode(c, {$project:{potpourri_3 : { $add:["g", "$y", 7, "$x"] }}}, 16554);
assertErrorCode(c, {$project:{potpourri_4 : { $add:["h", "$x", 8, "$y"] }}}, 16554);
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