--- /dev/null
+<?php declare(strict_types=1);
+
+namespace PhpParser;
+
+use PHPUnit\Framework\TestCase;
+
+class JsonDecoderTest extends TestCase
+{
+ public function testRoundTrip() {
+ $code = <<<'PHP'
+<?php
+// comment
+/** doc comment */
+function functionName(&$a = 0, $b = 1.0) {
+ echo 'Foo';
+}
+PHP;
+
+ $parser = new Parser\Php7(new Lexer());
+ $stmts = $parser->parse($code);
+ $json = json_encode($stmts);
+
+ $jsonDecoder = new JsonDecoder();
+ $decodedStmts = $jsonDecoder->decode($json);
+ $this->assertEquals($stmts, $decodedStmts);
+ }
+
+ /** @dataProvider provideTestDecodingError */
+ public function testDecodingError($json, $expectedMessage) {
+ $jsonDecoder = new JsonDecoder();
+ $this->expectException(\RuntimeException::class);
+ $this->expectExceptionMessage($expectedMessage);
+ $jsonDecoder->decode($json);
+ }
+
+ public function provideTestDecodingError() {
+ return [
+ ['???', 'JSON decoding error: Syntax error'],
+ ['{"nodeType":123}', 'Node type must be a string'],
+ ['{"nodeType":"Name","attributes":123}', 'Attributes must be an array'],
+ ['{"nodeType":"Comment"}', 'Comment must have text'],
+ ['{"nodeType":"xxx"}', 'Unknown node type "xxx"'],
+ ];
+ }
+}