deno.land / std@0.166.0 / collections / join_to_string_test.ts

join_to_string_test.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";import { joinToString } from "./join_to_string.ts";
Deno.test({ name: "[collections/joinToString] no mutation", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; joinToString(arr, (it) => it.name);
assertEquals(arr, [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]); },});
Deno.test({ name: "[collections/joinToString] identity", fn() { const arr = ["Kim", "Anna", "Tim"];
const out = joinToString(arr, (it) => it);
assertEquals(out, "Kim,Anna,Tim"); },});
Deno.test({ name: "[collections/joinToString] normal mapppers", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; const out = joinToString(arr, (it) => it.name);
assertEquals(out, "Kim,Anna,Tim"); },});
Deno.test({ name: "[collections/joinToString] separator", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; const out = joinToString(arr, (it) => it.name, { separator: " and " });
assertEquals(out, "Kim and Anna and Tim"); },});
Deno.test({ name: "[collections/joinToString] prefix", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; const out = joinToString(arr, (it) => it.name, { prefix: "winners are: ", });
assertEquals(out, "winners are: Kim,Anna,Tim"); },});
Deno.test({ name: "[collections/joinToString] suffix", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; const out = joinToString(arr, (it) => it.name, { suffix: " are winners", });
assertEquals(out, "Kim,Anna,Tim are winners"); },});
Deno.test({ name: "[collections/joinToString] limit", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; const out = joinToString(arr, (it) => it.name, { limit: 2, });
assertEquals(out, "Kim,Anna,..."); },});
Deno.test({ name: "[collections/joinToString] truncated", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; const out = joinToString(arr, (it) => it.name, { limit: 2, truncated: "...!", });
assertEquals(out, "Kim,Anna,...!"); },});
Deno.test({ name: "[collections/joinToString] all options", fn() { const arr = [ { name: "Kim", age: 22 }, { name: "Anna", age: 31 }, { name: "Tim", age: 58 }, ]; const out = joinToString(arr, (it) => it.name, { suffix: " are winners", prefix: "result: ", separator: " and ", limit: 1, truncated: "others", });
assertEquals(out, "result: Kim and others are winners"); },});
std
Deno standard library
GitHub Repositorydenoland/deno_std
GitHub Stars
2458

Version Info

Tagged at
2 months ago