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// Test the use of $each in $addToSet
t = db.update_addToSet3;
t.drop();
t.insert({_id: 1});
t.update({_id: 1}, {$addToSet: {a: {$each: [6, 5, 4]}}});
assert.eq(t.findOne(), {_id: 1, a: [6, 5, 4]}, "A1");
t.update({_id: 1}, {$addToSet: {a: {$each: [3, 2, 1]}}});
assert.eq(t.findOne(), {_id: 1, a: [6, 5, 4, 3, 2, 1]}, "A2");
t.update({_id: 1}, {$addToSet: {a: {$each: [4, 7, 9, 2]}}});
assert.eq(t.findOne(), {_id: 1, a: [6, 5, 4, 3, 2, 1, 7, 9]}, "A3");
t.update({_id: 1}, {$addToSet: {a: {$each: [12, 13, 12]}}});
assert.eq(t.findOne(), {_id: 1, a: [6, 5, 4, 3, 2, 1, 7, 9, 12, 13]}, "A4");
assert.writeError(t.update({_id: 1}, {$addToSet: {a: {$each: 0}}}));
assert.writeError(t.update({_id: 1}, {$addToSet: {a: {$each: {a: 1}}}}));
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