migrate deno_path to deno_std (denoland/deno_std#26)

Previously https://github.com/zhmushan/deno_path

Original: https://github.com/denoland/deno_std/commit/1a35f9daf5aa1c10c61d62cccbe7f9ae3c615a0e

1 files changed, 124 insertions, 0 deletions

diff --git a/path/join_test.ts b/path/join_test.ts
new file mode 100644
index 000000000..70b78c7be
--- /dev/null
+++ b/path/join_test.ts
@@ -0,0 +1,124 @@
+import { test, assertEqual } from "https://deno.land/x/testing/testing.ts";
+import * as path from "./index";
+
+const backslashRE = /\\/g;
+
+const joinTests =
+  // arguments                     result
+  [
+    [[".", "x/b", "..", "/b/c.js"], "x/b/c.js"],
+    [[], "."],
+    [["/.", "x/b", "..", "/b/c.js"], "/x/b/c.js"],
+    [["/foo", "../../../bar"], "/bar"],
+    [["foo", "../../../bar"], "../../bar"],
+    [["foo/", "../../../bar"], "../../bar"],
+    [["foo/x", "../../../bar"], "../bar"],
+    [["foo/x", "./bar"], "foo/x/bar"],
+    [["foo/x/", "./bar"], "foo/x/bar"],
+    [["foo/x/", ".", "bar"], "foo/x/bar"],
+    [["./"], "./"],
+    [[".", "./"], "./"],
+    [[".", ".", "."], "."],
+    [[".", "./", "."], "."],
+    [[".", "/./", "."], "."],
+    [[".", "/////./", "."], "."],
+    [["."], "."],
+    [["", "."], "."],
+    [["", "foo"], "foo"],
+    [["foo", "/bar"], "foo/bar"],
+    [["", "/foo"], "/foo"],
+    [["", "", "/foo"], "/foo"],
+    [["", "", "foo"], "foo"],
+    [["foo", ""], "foo"],
+    [["foo/", ""], "foo/"],
+    [["foo", "", "/bar"], "foo/bar"],
+    [["./", "..", "/foo"], "../foo"],
+    [["./", "..", "..", "/foo"], "../../foo"],
+    [[".", "..", "..", "/foo"], "../../foo"],
+    [["", "..", "..", "/foo"], "../../foo"],
+    [["/"], "/"],
+    [["/", "."], "/"],
+    [["/", ".."], "/"],
+    [["/", "..", ".."], "/"],
+    [[""], "."],
+    [["", ""], "."],
+    [[" /foo"], " /foo"],
+    [[" ", "foo"], " /foo"],
+    [[" ", "."], " "],
+    [[" ", "/"], " /"],
+    [[" ", ""], " "],
+    [["/", "foo"], "/foo"],
+    [["/", "/foo"], "/foo"],
+    [["/", "//foo"], "/foo"],
+    [["/", "", "/foo"], "/foo"],
+    [["", "/", "foo"], "/foo"],
+    [["", "/", "/foo"], "/foo"]
+  ];
+
+// Windows-specific join tests
+const windowsJoinTests = [
+  // arguments                     result
+  // UNC path expected
+  [["//foo/bar"], "\\\\foo\\bar\\"],
+  [["\\/foo/bar"], "\\\\foo\\bar\\"],
+  [["\\\\foo/bar"], "\\\\foo\\bar\\"],
+  // UNC path expected - server and share separate
+  [["//foo", "bar"], "\\\\foo\\bar\\"],
+  [["//foo/", "bar"], "\\\\foo\\bar\\"],
+  [["//foo", "/bar"], "\\\\foo\\bar\\"],
+  // UNC path expected - questionable
+  [["//foo", "", "bar"], "\\\\foo\\bar\\"],
+  [["//foo/", "", "bar"], "\\\\foo\\bar\\"],
+  [["//foo/", "", "/bar"], "\\\\foo\\bar\\"],
+  // UNC path expected - even more questionable
+  [["", "//foo", "bar"], "\\\\foo\\bar\\"],
+  [["", "//foo/", "bar"], "\\\\foo\\bar\\"],
+  [["", "//foo/", "/bar"], "\\\\foo\\bar\\"],
+  // No UNC path expected (no double slash in first component)
+  [["\\", "foo/bar"], "\\foo\\bar"],
+  [["\\", "/foo/bar"], "\\foo\\bar"],
+  [["", "/", "/foo/bar"], "\\foo\\bar"],
+  // No UNC path expected (no non-slashes in first component -
+  // questionable)
+  [["//", "foo/bar"], "\\foo\\bar"],
+  [["//", "/foo/bar"], "\\foo\\bar"],
+  [["\\\\", "/", "/foo/bar"], "\\foo\\bar"],
+  [["//"], "\\"],
+  // No UNC path expected (share name missing - questionable).
+  [["//foo"], "\\foo"],
+  [["//foo/"], "\\foo\\"],
+  [["//foo", "/"], "\\foo\\"],
+  [["//foo", "", "/"], "\\foo\\"],
+  // No UNC path expected (too many leading slashes - questionable)
+  [["///foo/bar"], "\\foo\\bar"],
+  [["////foo", "bar"], "\\foo\\bar"],
+  [["\\\\\\/foo/bar"], "\\foo\\bar"],
+  // Drive-relative vs drive-absolute paths. This merely describes the
+  // status quo, rather than being obviously right
+  [["c:"], "c:."],
+  [["c:."], "c:."],
+  [["c:", ""], "c:."],
+  [["", "c:"], "c:."],
+  [["c:.", "/"], "c:.\\"],
+  [["c:.", "file"], "c:file"],
+  [["c:", "/"], "c:\\"],
+  [["c:", "file"], "c:\\file"]
+];
+
+test(function join() {
+  joinTests.forEach(function(p) {
+    const actual = path.posix.join.apply(null, p[0]);
+    assertEqual(actual, p[1]);
+  });
+});
+
+test(function joinWin32() {
+  joinTests.forEach(function(p) {
+    const actual = path.win32.join.apply(null, p[0]).replace(backslashRE, "/");
+    assertEqual(actual, p[1]);
+  });
+  windowsJoinTests.forEach(function(p) {
+    const actual = path.win32.join.apply(null, p[0]);
+    assertEqual(actual, p[1]);
+  });
+});