bug: two-arg open() doesn't strip whitespace from filename like real Perl

[toddr-bot]

Bug

Two-arg open() with whitespace between the mode prefix and filename fails to match mocked files.

my $mock = Test::MockFile->file('/tmp/file', 'hello');

# Works:
open(my $fh1, '</tmp/file');

# Fails with ENOENT — Perl strips the space, MockFile doesn't:
open(my $fh2, '< /tmp/file');

Real Perl strips leading and trailing whitespace from the filename portion after extracting the mode prefix (<, >, >>, +<, +>, +>>). This is a common Perl idiom (open(my $fh, "> $path") with a space for readability).

MockFile's regex captures the whitespace literally, producing a path like /tmp/file that doesn't match the mock registered at /tmp/file.

Affected modes

All two-arg modes: <, >, >>, +<, +>, +>>, and bare filenames (no mode prefix).

Not affected

• Three-arg open(FH, '<', $path) — filename comes from a separate argument, no mode parsing
• Pipe modes (|-, -|) — fall through to CORE::open

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🤖 Created by Kōan