chore: add integration tests for count

[nirinchev]

No description provided.

[coveralls]

coverage: 50.98% (+0.4%) from 50.613%
when pulling 3eb7553 on ni/integration-count
into 939faad on main.

[gagik]

Suggested change

	const testCases = [
	{ filter: undefined, expectedCount: 3 },
	{ filter: {}, expectedCount: 3 },
	{ filter: { age: { $lt: 15 } }, expectedCount: 2 },
	{ filter: { age: { $gt: 5 }, name: { $regex: "^P" } }, expectedCount: 1 },
	];
	for (const testCase of testCases) {
	for (const testCase of [
	{ filter: undefined, expectedCount: 3 },
	{ filter: {}, expectedCount: 3 },
	{ filter: { age: { $lt: 15 } }, expectedCount: 2 },
	{ filter: { age: { $gt: 5 }, name: { $regex: "^P" } }, expectedCount: 1 },
	]) {

nit: I think this is quicker to read

[nirinchev]

I initially had it like that, but then moved it out because I thought it's getting cluttered with the test case definition inlined into the for loop.

[gagik]

Suggested change

	const args = [
	{},
	{ database: 123, collection: "bar" },
	{ foo: "bar", database: "test", collection: "bar" },
	{ collection: [], database: "test" },
	{ collection: "bar", database: "test", query: "{ $gt: { foo: 5 } }" },
	];
	for (const arg of args) {
	for (const arg of [
	{},
	{ database: 123, collection: "bar" },
	{ foo: "bar", database: "test", collection: "bar" },
	{ collection: [], database: "test" },
	{ collection: "bar", database: "test", query: "{ $gt: { foo: 5 } }" },
	]) {