Test the primitive-checker

test/safe/imitate/index.test.js

@@ -3,10 +3,6 @@ import _ from 'lodash'
 import explain from '../../../src/explain'
 import subject from '../../../src/imitate'
 
-// WARNING: this is not a unit test! This is a functional test to prove out an
-//         algorithm. Ideally I would have broken this up, but I really
-//         struggled at first and wanted to prove it out wired up to the td@3 impl
-
 module.exports = {
   'strict equal stuff (not objects typically)': () => {
     [

test/unit/imitate/overwrite-children/is-primitive-like.test.js

@@ -0,0 +1,32 @@
+import subject from '../../../../src/imitate/overwrite-children/is-primitive-like'
+
+module.exports = {
+  'identifies primitive things': () => {
+    assert.equal(subject(), true)
+    assert.equal(subject(false), true)
+    assert.equal(subject(true), true)
+    assert.equal(subject(undefined), true)
+    assert.equal(subject(null), true)
+    assert.equal(subject(1), true)
+    assert.equal(subject('hi'), true)
+    assert.equal(subject(NaN), true)
+  },
+  'identifies symbols': () => {
+    if (!global.Symbol) return
+
+    assert.equal(subject(Symbol.species), true)
+  },
+  'identifies boxed types and basic value types': () => {
+    assert.equal(subject(new String('hi')), true) // eslint-disable-line
+    assert.equal(subject(new Boolean(true)), true)  // eslint-disable-line
+    assert.equal(subject(new Number(0)), true)  // eslint-disable-line
+    assert.equal(subject(/hi/), true)
+    assert.equal(subject(new Date()), true)
+  },
+  'gives functions, arrays, and custom objects a pass': () => {
+    assert.equal(subject(new Object()), false) // eslint-disable-line
+    assert.equal(subject(function () {}), false)
+    assert.equal(subject([]), false)
+    assert.equal(subject({}), false)
+  }
+}