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denoland-deno/std/path/zero_length_strings_test.ts

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// Copyright the Browserify authors. MIT License.
// Ported from https://github.com/browserify/path-browserify/
const { cwd, test } = Deno;
import { assertEquals } from "../testing/asserts.ts";
import * as path from "./mod.ts";
const pwd = cwd();
test(function joinZeroLength() {
// join will internally ignore all the zero-length strings and it will return
// '.' if the joined string is a zero-length string.
assertEquals(path.posix.join(""), ".");
assertEquals(path.posix.join("", ""), ".");
if (path.win32) assertEquals(path.win32.join(""), ".");
if (path.win32) assertEquals(path.win32.join("", ""), ".");
assertEquals(path.join(pwd), pwd);
assertEquals(path.join(pwd, ""), pwd);
});
test(function normalizeZeroLength() {
// normalize will return '.' if the input is a zero-length string
assertEquals(path.posix.normalize(""), ".");
if (path.win32) assertEquals(path.win32.normalize(""), ".");
assertEquals(path.normalize(pwd), pwd);
});
test(function isAbsoluteZeroLength() {
// Since '' is not a valid path in any of the common environments,
// return false
assertEquals(path.posix.isAbsolute(""), false);
if (path.win32) assertEquals(path.win32.isAbsolute(""), false);
});
test(function resolveZeroLength() {
// resolve, internally ignores all the zero-length strings and returns the
// current working directory
assertEquals(path.resolve(""), pwd);
assertEquals(path.resolve("", ""), pwd);
});
test(function relativeZeroLength() {
// relative, internally calls resolve. So, '' is actually the current
// directory
assertEquals(path.relative("", pwd), "");
assertEquals(path.relative(pwd, ""), "");
assertEquals(path.relative(pwd, pwd), "");
});