test: Misc Windows unit test fixes

Fixes #5071, #5073.

* Normalize capitalization of drive letter
* Fix `exit()` typo in failure path
* Ignore symlink tests (Windows) if not elevated

The `test_relative_input_cwd()` test was failing on Windows when
`skipSymlinks` was `true`. So we won't run it if `skipSymlinks` is
`true`.

When it failed, the unhandled error caused Node to die before
having a chance to clean up, which resulted in two files missing
in subsequent unit tests:

 * `test/fixtures/nested-index/one/hello.js`
 * `test/fixtures/nested-index/one/index.js`

We should probably find a way to isolate this test from the other
test (`simple/test-module-loading`) that was failing when this test
poluted the disk state.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/path.js b/lib/path.js
index da0f8bee68..db0cdea2dd 100644
--- a/lib/path.js
+++ b/lib/path.js
@@ -176,6 +176,11 @@ if (isWindows) {
         tail = result[3],
         trailingSlash = /[\\\/]$/.test(tail);
 
+    // If device is a drive letter, we'll normalize to lower case.
+    if (device && device.charAt(1) === ':') {
+      device = device[0].toLowerCase() + device.substr(1);
+    }
+
     // Normalize the tail path
     tail = normalizeArray(tail.split(/[\\\/]+/).filter(function(p) {
       return !!p;