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// Test $all/$elemMatch/null matching - SERVER-4517
t = db.jstests_all5;
t.drop();
function checkMatch(doc) {
t.drop();
t.save(doc);
assert.eq(1, t.count({a: {$elemMatch: {b: null}}}));
assert.eq(1, t.count({a: {$all: [{$elemMatch: {b: null}}]}}));
}
function checkNoMatch(doc) {
t.drop();
t.save(doc);
assert.eq(0, t.count({a: {$all: [{$elemMatch: {b: null}}]}}));
}
checkNoMatch({});
checkNoMatch({a: 1});
checkNoMatch({a: []});
checkNoMatch({a: [1]});
checkMatch({a: [{}]});
checkMatch({a: [{c: 1}]});
checkMatch({a: [{b: null}]});
checkNoMatch({a: [{b: 1}]}, 0);
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