50 lines
1.9 KiB
JavaScript
50 lines
1.9 KiB
JavaScript
/**
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* Tests array append/removal operations using $push.
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*
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* The $push operator also supports modifiers such as $each, $slice, $sort, and $position
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* that are described in the documentation:
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* https://docs.mongodb.com/manual/reference/operator/update/push/#modifiers
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*
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* Tests for these modifiers may be found in:
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* - jstests/core/push_sort.js
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* - src/mongod/db/update/push_node_test.cpp
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*/
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(function() {
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'use strict';
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const t = db.push;
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t.drop();
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assert.commandWorked(t.insert({_id: 2, a: [1]}));
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assert.commandWorked(t.update({_id: 2}, {$push: {a: 2}}));
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assert.sameMembers([1, 2], t.findOne().a, "Array should contain 2 elements after appending 2.");
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assert.commandWorked(t.update({_id: 2}, {$push: {a: 3}}));
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assert.sameMembers([1, 2, 3], t.findOne().a, "Array should contain 3 elements after appending 3.");
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assert.commandWorked(t.update({_id: 2}, {$pop: {a: 1}}));
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assert.sameMembers(
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[1, 2], t.findOne().a, "Array should contain 2 elements after removing the last element.");
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assert.commandWorked(t.update({_id: 2}, {$pop: {a: -1}}));
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assert.sameMembers(
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[2], t.findOne().a, "Array should contain 1 element after removing the first element.");
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assert.commandWorked(t.update({_id: 2}, {$pop: {a: -1}}));
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assert.sameMembers([], t.findOne().a, "Array should be empty after removing the first element");
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assert.commandWorked(t.update({_id: 2}, {$pop: {a: 1}}));
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assert.sameMembers(
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[], t.findOne().a, "Empty array should remain empty after trying to remove the last element.");
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assert.commandWorked(t.update({_id: 2}, {$pop: {b: -1}}));
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assert.sameMembers(
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[],
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t.findOne().a,
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"Popping (first element of) non-existent field should not affect array in field 'a'.");
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assert.commandWorked(t.update({_id: 2}, {$pop: {b: 1}}));
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assert.sameMembers(
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[],
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t.findOne().a,
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"Popping (last element of) non-existent field should not affect array in field 'a'.");
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})();
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