chore: import upstream snapshot with attribution

tests/one/pointers/complement.test.js

@@ -0,0 +1,36 @@
+import test from 'tape'
+import nlp from '../_lib.js'
+const here = '[one/pointer-complement] '
+
+test('pointer-complement-basic :', function (t) {
+  const doc = nlp('ooh. one two three four five six seven')
+
+  // start + end overlap
+  const m = doc.update([[1, 0, 4]])
+  const res = m.complement()
+  t.equal(res.text(), 'ooh. five six seven', here + 'complement-one')
+
+  t.end()
+})
+
+test('complement-match :', function (t) {
+  const str = 'one match two three. four five match six'
+  const doc = nlp(str)
+
+  let res = doc.match('match .').complement()
+  t.deepEqual(res.out('array'), ['one', 'three.', 'four five'], here + 'compliment-multi')
+
+  res = doc.match('one match').complement()
+  t.deepEqual(res.text('machine'), 'two three. four five match six', here + 'compliment-start')
+
+  res = doc.eq(0).complement()
+  t.deepEqual(res.text(), 'four five match six', here + 'compliment-no-n')
+
+  res = doc.match('foo foo').complement()
+  t.deepEqual(res.text(), str, here + 'compliment-of-null')
+
+  res = doc.complement()
+  t.deepEqual(res.text(), '', here + 'compliment-of-all')
+
+  t.end()
+})