private function assertTokens($grammar, array $expectations, $msg = "")
{
$scanner = new Scanner(trim($grammar));
$count = 0;
while ($scanner->hasNextToken()) {
$scanner->nextToken();
$token = $scanner->currentToken();
$this->assertNotNull($token, $msg);
$expectation = $expectations[$count];
$this->assertInstanceOf("de\\weltraumschafbnf\\Token", $token, "{$msg} {$count}: {$token->getValue()}");
$this->assertEquals($expectation["type"], $token->getType(), "{$msg} {$count} type: {$token->getValue()}");
$this->assertEquals($expectation["value"], $token->getValue(), "{$msg} {$count} value: {$token->getValue()}");
$position = $token->getPosition();
$this->assertInstanceOf("de\\weltraumschafbnf\\Position", $position, "{$msg} {$count}: {$token->getValue()}");
$this->assertNull($position->getFile(), $count);
$this->assertEquals($expectation["line"], $position->getLine(), "{$msg} {$count} line: {$token->getValue()}");
$this->assertEquals($expectation["col"], $position->getColumn(), "{$msg} {$count} col: {$token->getValue()}");
$count++;
}
$this->assertEquals(count($expectations), $count, "{$msg}: Not enough tokens!");
foreach (array(1, 3, 5, 20, 200000) as $backTracks) {
$index = $count - ($backTracks + 1);
if ($index < 0) {
try {
$token = $scanner->backtrackToken($backTracks);
$this->fail("Expected excpetion not thrown!");
} catch (\InvalidArgumentException $e) {
}
continue;
} else {
$token = $scanner->backtrackToken($backTracks);
}
$expectation = $expectations[$index];
$this->assertInstanceOf("de\\weltraumschafbnf\\Token", $token);
$this->assertEquals($expectation["type"], $token->getType());
$this->assertEquals($expectation["value"], $token->getValue());
$position = $token->getPosition();
$this->assertInstanceOf("de\\weltraumschafbnf\\Position", $position);
$this->assertNull($position->getFile(), $count);
$this->assertEquals($expectation["line"], $position->getLine());
$this->assertEquals($expectation["col"], $position->getColumn());
}
}
