feat: add test

Signed-off-by: francesco <[email protected]>

Author: cesco69

test/json-add-comma.test.js

@@ -0,0 +1,57 @@
+'use strict'
+
+const { test } = require('node:test')
+const build = require('..')
+
+test('additionalProperties: false', (t) => {
+  t.plan(1)
+  const stringify = build({
+    title: 'additionalProperties',
+    type: 'object',
+    properties: {
+      foo: {
+        type: 'string'
+      }
+    },
+    additionalProperties: false
+  })
+
+  const obj = { foo: 'a', bar: 'b', baz: 'c' }
+  t.assert.equal(stringify(obj), '{"foo":"a"}')
+})
+
+test('additionalProperties: {}', (t) => {
+  t.plan(1)
+  const stringify = build({
+    title: 'additionalProperties',
+    type: 'object',
+    properties: {
+      foo: {
+        type: 'string'
+      }
+    },
+    additionalProperties: {}
+  })
+
+  const obj = { foo: 'a', bar: 'b', baz: 'c' }
+  t.assert.equal(stringify(obj), '{"foo":"a","bar":"b","baz":"c"}')
+})
+
+test('additionalProperties: {type: string}', (t) => {
+  t.plan(1)
+  const stringify = build({
+    title: 'additionalProperties',
+    type: 'object',
+    properties: {
+      foo: {
+        type: 'string'
+      }
+    },
+    additionalProperties: {
+      type: 'string'
+    }
+  })
+
+  const obj = { foo: 'a', bar: 'b', baz: 'c' }
+  t.assert.equal(stringify(obj), '{"foo":"a","bar":"b","baz":"c"}')
+})