fix: wrap multi-type in brackets to ensure scoping is correct

Author: MarshallOfSound

lib/utils.js

@@ -33,7 +33,7 @@ const typify = (type) => {
   }
 
   if (Array.isArray(type)) {
-    const arrayType = Array.from(new Set(type.map(t => typify(t)))).join(' | ')
+    const arrayType = Array.from(new Set(type.map(t => `(${typify(t)})`))).join(' | ')
     if (originalType.collection) {
       return `Array<${arrayType}>`
     }

test/utils_spec.js

@@ -67,11 +67,11 @@ describe('utils', () => {
     })
 
     it('should map an array of types through typify as well', () => {
-      expect(utils.typify(['String', 'Float', 'Boolean'])).to.deep.equal('string | number | boolean')
+      expect(utils.typify(['String', 'Float', 'Boolean'])).to.deep.equal('(string) | (number) | (boolean)')
     })
 
     it('should map an array of types through typify as well and remove duplicates', () => {
-      expect(utils.typify(['String', 'Float', 'Double'])).to.deep.equal('string | number')
+      expect(utils.typify(['String', 'Float', 'Double'])).to.deep.equal('(string) | (number)')
     })
 
     it('should map node objects to the correct type', () => {