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partition_entries_test.ts
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partition_entries_test.ts
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../assert/mod.ts";
import { partitionEntries } from "./partition_entries.ts";
function partitionEntriesTest<T>(
input: [Record<string, T>, (entry: [string, T]) => boolean],
expected: [match: Record<string, T>, rest: Record<string, T>],
message?: string,
) {
const actual = partitionEntries(...input);
assertEquals(actual, expected, message);
}
Deno.test({
name: "[collections/partitionEntries] no mutation",
fn() {
const object = { a: 5, b: true };
partitionEntries(object, ([key]) => key !== "a");
assertEquals(object, { a: 5, b: true });
},
});
Deno.test({
name: "[collections/partitionEntries] empty input",
fn() {
partitionEntriesTest(
[{}, () => true],
[{}, {}],
);
},
});
Deno.test({
name: "[collections/partitionEntries] identity",
fn() {
partitionEntriesTest(
[
{
foo: true,
bar: "lorem",
1: -5,
},
() => true,
],
[{
foo: true,
bar: "lorem",
1: -5,
}, {}],
);
},
});
Deno.test({
name: "[collections/partitionEntries] clean object",
fn() {
partitionEntriesTest(
[
{ test: "foo", "": [] },
() => false,
],
[{}, { test: "foo", "": [] }],
);
},
});
Deno.test({
name: "[collections/partitionEntries] filters",
fn() {
partitionEntriesTest(
[
{
"Anna": 22,
"Kim": 24,
"Karen": 33,
"Claudio": 11,
"Karl": 45,
},
([name, age]) => name.startsWith("K") && age > 30,
],
[
{
"Karen": 33,
"Karl": 45,
},
{
"Anna": 22,
"Kim": 24,
"Claudio": 11,
},
],
);
partitionEntriesTest(
[
{
"A": true,
"b": "foo",
"C": 5,
"d": -2,
"": false,
},
([key]) => key.toUpperCase() === key,
],
[
{
"A": true,
"C": 5,
"": false,
},
{
"b": "foo",
"d": -2,
},
],
);
},
});