revert a2271529a8

revert revert c74f28caa7

revert one

node_modules/@fastify/merge-json-schemas/test/nullable.test.js

@@ -0,0 +1,30 @@
+'use strict'
+
+const assert = require('node:assert/strict')
+const { test } = require('node:test')
+const { mergeSchemas } = require('../index')
+const { defaultResolver } = require('./utils')
+
+test('should merge empty schema and nullable = true keyword', () => {
+  const schema1 = { type: 'string' }
+  const schema2 = { type: 'string', nullable: true }
+
+  const mergedSchema = mergeSchemas([schema1, schema2], { defaultResolver })
+  assert.deepStrictEqual(mergedSchema, { type: 'string', nullable: true })
+})
+
+test('should merge empty schema and nullable = false keyword', () => {
+  const schema1 = { type: 'string' }
+  const schema2 = { type: 'string', nullable: false }
+
+  const mergedSchema = mergeSchemas([schema1, schema2], { defaultResolver })
+  assert.deepStrictEqual(mergedSchema, { type: 'string', nullable: false })
+})
+
+test('should merge schemas with nullable true and false values', () => {
+  const schema1 = { type: 'string', nullable: false }
+  const schema2 = { type: 'string', nullable: true }
+
+  const mergedSchema = mergeSchemas([schema1, schema2], { defaultResolver })
+  assert.deepStrictEqual(mergedSchema, { type: 'string', nullable: false })
+})