1 files changed, 46 insertions, 0 deletions
diff --git a/fs/path/zero_length_strings_test.ts b/fs/path/zero_length_strings_test.ts
new file mode 100644
index 000000000..d069c781f
--- /dev/null
+++ b/fs/path/zero_length_strings_test.ts
@@ -0,0 +1,46 @@
+// Copyright the Browserify authors. MIT License.
+// Ported from https://github.com/browserify/path-browserify/
+
+import { test, assertEqual } from "../../testing/mod.ts";
+import * as path from "./mod.ts";
+import { cwd } from "deno";
+
+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.
+  assertEqual(path.posix.join(""), ".");
+  assertEqual(path.posix.join("", ""), ".");
+  if (path.win32) assertEqual(path.win32.join(""), ".");
+  if (path.win32) assertEqual(path.win32.join("", ""), ".");
+  assertEqual(path.join(pwd), pwd);
+  assertEqual(path.join(pwd, ""), pwd);
+});
+
+test(function normalizeZeroLength() {
+  // normalize will return '.' if the input is a zero-length string
+  assertEqual(path.posix.normalize(""), ".");
+  if (path.win32) assertEqual(path.win32.normalize(""), ".");
+  assertEqual(path.normalize(pwd), pwd);
+});
+
+test(function isAbsoluteZeroLength() {
+  // Since '' is not a valid path in any of the common environments, return false
+  assertEqual(path.posix.isAbsolute(""), false);
+  if (path.win32) assertEqual(path.win32.isAbsolute(""), false);
+});
+
+test(function resolveZeroLength() {
+  // resolve, internally ignores all the zero-length strings and returns the
+  // current working directory
+  assertEqual(path.resolve(""), pwd);
+  assertEqual(path.resolve("", ""), pwd);
+});
+
+test(function relativeZeroLength() {
+  // relative, internally calls resolve. So, '' is actually the current directory
+  assertEqual(path.relative("", pwd), "");
+  assertEqual(path.relative(pwd, ""), "");
+  assertEqual(path.relative(pwd, pwd), "");
+});