feat(std/path): Add fromFileUrl() (#4993)

Fix: URL constructor accepts a URL object which is not a base

1 files changed, 37 insertions, 0 deletions

diff --git a/std/path/from_file_url_test.ts b/std/path/from_file_url_test.ts
new file mode 100644
index 000000000..79389b91b
--- /dev/null
+++ b/std/path/from_file_url_test.ts
@@ -0,0 +1,37 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import * as path from "./mod.ts";
+import { assertEquals } from "../testing/asserts.ts";
+
+Deno.test("[path] fromFileUrl", function () {
+  assertEquals(
+    path.posix.fromFileUrl(new URL("file:///home/foo")),
+    "/home/foo"
+  );
+  assertEquals(path.posix.fromFileUrl("file:///home/foo"), "/home/foo");
+  assertEquals(path.posix.fromFileUrl("https://example.com/foo"), "/foo");
+  assertEquals(path.posix.fromFileUrl("file:///"), "/");
+});
+
+Deno.test("[path] fromFileUrl (win32)", function () {
+  assertEquals(
+    path.win32.fromFileUrl(new URL("file:///home/foo")),
+    "\\home\\foo"
+  );
+  assertEquals(path.win32.fromFileUrl("file:///home/foo"), "\\home\\foo");
+  assertEquals(path.win32.fromFileUrl("https://example.com/foo"), "\\foo");
+  assertEquals(path.win32.fromFileUrl("file:///"), "\\");
+  // FIXME(nayeemrmn): Support UNC paths. Needs support in the underlying URL
+  // built-in like Chrome has.
+  // assertEquals(path.win32.fromFileUrl("file:////"), "\\");
+  // assertEquals(path.win32.fromFileUrl("file:////server"), "\\");
+  // assertEquals(path.win32.fromFileUrl("file:////server/file"), "\\file");
+  assertEquals(path.win32.fromFileUrl("file:///c"), "\\c");
+  assertEquals(path.win32.fromFileUrl("file:///c:"), "\\c:");
+  assertEquals(path.win32.fromFileUrl("file:///c:/"), "c:\\");
+  assertEquals(path.win32.fromFileUrl("file:///C:/"), "C:\\");
+  assertEquals(path.win32.fromFileUrl("file:///C:/Users/"), "C:\\Users\\");
+  assertEquals(
+    path.win32.fromFileUrl("file:///C:cwd/another"),
+    "\\C:cwd\\another"
+  );
+});