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t = db.all2;
t.drop();

t.save({a: [{x: 1}, {x: 2}]});
t.save({a: [{x: 2}, {x: 3}]});
t.save({a: [{x: 3}, {x: 4}]});

state = "no index";

function check(n, q, e) {
    assert.eq(n, t.find(q).count(), tojson(q) + " " + e + " count " + state);
    assert.eq(n, t.find(q).itcount(), tojson(q) + " " + e + " itcount" + state);
}

check(1, {"a.x": {$in: [1]}}, "A");
check(2, {"a.x": {$in: [2]}}, "B");

check(2, {"a.x": {$in: [1, 2]}}, "C");
check(3, {"a.x": {$in: [2, 3]}}, "D");
check(3, {"a.x": {$in: [1, 3]}}, "E");

check(1, {"a.x": {$all: [1, 2]}}, "F");
check(1, {"a.x": {$all: [2, 3]}}, "G");
check(0, {"a.x": {$all: [1, 3]}}, "H");

t.createIndex({"a.x": 1});
state = "index";

check(1, {"a.x": {$in: [1]}}, "A");
check(2, {"a.x": {$in: [2]}}, "B");

check(2, {"a.x": {$in: [1, 2]}}, "C");
check(3, {"a.x": {$in: [2, 3]}}, "D");
check(3, {"a.x": {$in: [1, 3]}}, "E");

check(1, {"a.x": {$all: [1, 2]}}, "F");
check(1, {"a.x": {$all: [2, 3]}}, "G");
check(0, {"a.x": {$all: [1, 3]}}, "H");

// --- more

t.drop();

t.save({a: [1, 2]});
t.save({a: [2, 3]});
t.save({a: [3, 4]});

state = "more no index";

check(1, {"a": {$in: [1]}}, "A");
check(2, {"a": {$in: [2]}}, "B");

check(2, {"a": {$in: [1, 2]}}, "C");
check(3, {"a": {$in: [2, 3]}}, "D");
check(3, {"a": {$in: [1, 3]}}, "E");

check(1, {"a": {$all: [1, 2]}}, "F");
check(1, {"a": {$all: [2, 3]}}, "G");
check(0, {"a": {$all: [1, 3]}}, "H");

t.createIndex({"a": 1});
state = "more index";

check(1, {"a": {$in: [1]}}, "A");
check(2, {"a": {$in: [2]}}, "B");

check(2, {"a": {$in: [1, 2]}}, "C");
check(3, {"a": {$in: [2, 3]}}, "D");
check(3, {"a": {$in: [1, 3]}}, "E");

check(1, {"a": {$all: [1, 2]}}, "F");
check(1, {"a": {$all: [2, 3]}}, "G");
check(0, {"a": {$all: [1, 3]}}, "H");

// more 2

state = "more 2";

t.drop();
t.save({name: ["harry", "jack", "tom"]});
check(0, {name: {$all: ["harry", "john"]}}, "A");
t.createIndex({name: 1});
check(0, {name: {$all: ["harry", "john"]}}, "B");