Negation doesn't properly invert matching of patterns

[bhuber]

Here's a very simple set of test cases. Based on my understanding of negation, !(<some pattern>) should precisely invert the results of (<some pattern>), i.e. any path that matches the first should not match the second, and vice versa. This is not the case.

const pm = require('picomatch');

function test(matcher, path) {
    const matches = matcher(path) ? '✓' : '✗';
    console.log(`${matches}: ${path}`);
}

const tests = ['foo', 'foo/.bar', '.bar', '.foo/.bar'];

function testGlob(glob) {
    const matcher = pm(glob);
    console.log(glob)
    tests.forEach(t => test(matcher, t));
    console.log('')
}

testGlob('.*')
testGlob('(.*)')
testGlob('!(.*)')

Current output:

.*
✗: foo
✗: foo/.bar
✓: .bar
✗: .foo/.bar

(.*)
✗: foo
✗: foo/.bar
✓: .bar
✗: .foo/.bar

!(.*)
✓: foo
✗: foo/.bar
✗: .bar
✗: .foo/.bar

The first two patterns match correctly, but ! appears to break the behavior of .*