Drop does/did when turning a negative verb positive

tests/three/sentences/negative-sentences.test.js

@@ -12,3 +12,13 @@ test('sentences.toPositive', function (t) {
 
   t.end()
 })
+
+test('sentences.toPositive does-not', function (t) {
+  const doc = nlp(`He does not like camels.`)
+  doc.sentences().toPositive()
+  t.equal(doc.text(), 'He likes camels.', here + 'does not')
+
+  doc.sentences().toNegative()
+  t.equal(doc.text(), 'He does not like camels.', here + 'back to neg')
+  t.end()
+})

tests/three/verbs/negation/to-positive.test.js

@@ -0,0 +1,30 @@
+import test from 'tape'
+import nlp from '../../_lib.js'
+const here = '[three/verb-toPositive] '
+
+test('inline verb toPositive:', function (t) {
+  const arr = [
+    [`he does not like camels`, 'he likes camels'],
+    [`he did not like camels`, 'he liked camels'],
+    [`he doesn't like camels`, 'he likes camels'],
+    [`she didn't go home`, 'she went home'],
+    [`it does not matter`, 'it matters'],
+    [`he does not have a car`, 'he has a car'],
+    [`he does not really like camels`, 'he really likes camels'],
+    [`spencer did not walk`, 'spencer walked'],
+    // already worked
+    [`they do not like camels`, 'they like camels'],
+    [`i do not like camels`, 'i like camels'],
+    [`do not use reverse psychology`, 'use reverse psychology'],
+    [`he is not cool`, 'he is cool'],
+    [`he will not go`, 'he will go'],
+    [`he has not eaten`, 'he has eaten'],
+  ]
+  arr.forEach(function (a) {
+    const doc = nlp(a[0])
+    doc.verbs().toPositive()
+    const str = doc.text('normal')
+    t.equal(str, a[1], here + a[1] + ' --- ' + str)
+  })
+  t.end()
+})