support older node versions

CONTRIBUTING.md

@@ -8,3 +8,6 @@
 - Use `DEBUG=true npm run tdd` to add logging output to the above command
 - Add `export let only=true` to a test in test/e2e to just run that test
 - Add `export let exclude=true` to a test in test/e2e to not run that test
+- To debug a test, with breakpoints:
+  1. Install [node-inspector](https://www.npmjs.com/package/node-inspector)
+  2. Run `node-debug ./node_modules/ava/profile.js ./dist/test/test.js`

circle.yml

@@ -1,3 +1,8 @@
 machine:
   node:
-    version: 6.3.0
+    version: 6.3.0
+test:
+  override:
+    - nvm i v4.5.0 && rm -rf node_modules && npm i
+    - nvm i v6.10.2 && rm -rf node_modules && npm i
+    - nvm i v7.9.0 && rm -rf node_modules && npm i

package.json

@@ -7,6 +7,9 @@
     "json2ts": "dist/src/cli.js"
   },
   "typings": "dist/src/index.d.ts",
+  "engines": {
+    "node": ">=4.5.0"
+  },
   "scripts": {
     "build": "npm run clean && mkdir dist && npm run build:browser && npm run build:server",
     "build:browser": "browserify src/index.ts -s jstt -p tsify > dist/bundle.js",

src/parser.ts

@@ -1,6 +1,6 @@
 import { whiteBright } from 'cli-color'
 import { JSONSchema4Type, JSONSchema4TypeName } from 'json-schema'
-import { findKey, isPlainObject, map } from 'lodash'
+import { findKey, includes, isPlainObject, map } from 'lodash'
 import { typeOfSchema } from './typeOfSchema'
 import { AST, T_ANY, T_ANY_ADDITIONAL_PROPERTIES, TInterfaceParam } from './types/AST'
 import { JSONSchema, JSONSchemaWithDefinitions, SchemaSchema } from './types/JSONSchema'
@@ -218,7 +218,7 @@ function parseSchema(
 
   const asts = map(schema.properties, (value, key: string) => ({
     ast: parse(value, rootSchema, key, processed),
-    isRequired: (schema.required || []).includes(key),
+    isRequired: includes(schema.required || [], key),
     keyName: key
   }))