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<?php
// @codingStandardsIgnoreLine Squiz.Classes.ValidClassName.NotCamelCaps
abstract class Scribunto_LuaInterpreterTest extends MediaWikiTestCase {
abstract protected function newInterpreter( $opts = [] );
protected function setUp() {
parent::setUp();
try {
$this->newInterpreter();
} catch ( Scribunto_LuaInterpreterNotFoundError $e ) {
$this->markTestSkipped( "interpreter not available" );
}
}
protected function getBusyLoop( $interpreter ) {
$chunk = $interpreter->loadString( '
local args = {...}
local x, i
local s = string.rep("x", 1000000)
local n = args[1]
for i = 1, n do
x = x or string.find(s, "y", 1, true)
end',
'busy' );
return $chunk;
}
/** @dataProvider provideRoundtrip */
public function testRoundtrip( /*...*/ ) {
$args = func_get_args();
$args = $this->normalizeOrder( $args );
$interpreter = $this->newInterpreter();
$passthru = $interpreter->loadString( 'return ...', 'passthru' );
$finalArgs = $args;
array_unshift( $finalArgs, $passthru );
$ret = call_user_func_array( [ $interpreter, 'callFunction' ], $finalArgs );
$ret = $this->normalizeOrder( $ret );
$this->assertSame( $args, $ret );
}
/** @dataProvider provideRoundtrip */
public function testDoubleRoundtrip( /* ... */ ) {
$args = func_get_args();
$args = $this->normalizeOrder( $args );
$interpreter = $this->newInterpreter();
$interpreter->registerLibrary( 'test',
[ 'passthru' => [ $this, 'passthru' ] ] );
$doublePassthru = $interpreter->loadString(
'return test.passthru(...)', 'doublePassthru' );
$finalArgs = $args;
array_unshift( $finalArgs, $doublePassthru );
$ret = call_user_func_array( [ $interpreter, 'callFunction' ], $finalArgs );
$ret = $this->normalizeOrder( $ret );
$this->assertSame( $args, $ret );
}
/**
* This cannot be done in testRoundtrip and testDoubleRoundtrip, because
* assertSame( NAN, NAN ) returns false.
*/
public function testRoundtripNAN() {
$interpreter = $this->newInterpreter();
$passthru = $interpreter->loadString( 'return ...', 'passthru' );
$ret = $interpreter->callFunction( $passthru, NAN );
$this->assertTrue( is_nan( $ret[0] ), 'NaN was not passed through' );
$interpreter->registerLibrary( 'test',
[ 'passthru' => [ $this, 'passthru' ] ] );
$doublePassthru = $interpreter->loadString(
'return test.passthru(...)', 'doublePassthru' );
$ret = $interpreter->callFunction( $doublePassthru, NAN );
$this->assertTrue( is_nan( $ret[0] ), 'NaN was not double passed through' );
}
private function normalizeOrder( $a ) {
ksort( $a );
foreach ( $a as &$value ) {
if ( is_array( $value ) ) {
$value = $this->normalizeOrder( $value );
}
}
return $a;
}
public function passthru( /* ... */ ) {
$args = func_get_args();
return $args;
}
public function provideRoundtrip() {
return [
[ 1 ],
[ true ],
[ false ],
[ 'hello' ],
[ implode( '', array_map( 'chr', range( 0, 255 ) ) ) ],
[ 1, 2, 3 ],
[ [] ],
[ [ 0 => 'foo', 1 => 'bar' ] ],
[ [ 1 => 'foo', 2 => 'bar' ] ],
[ [ 'x' => 'foo', 'y' => 'bar', 'z' => [] ] ],
[ INF ],
[ -INF ],
[ 'ok', null, 'ok' ],
[ null, 'ok' ],
[ 'ok', null ],
[ null ],
];
}
public function testTimeLimit() {
if ( php_uname( 's' ) === 'Darwin' ) {
$this->markTestSkipped( "Darwin is lacking POSIX timer, skipping CPU time limiting test." );
}
$interpreter = $this->newInterpreter( [ 'cpuLimit' => 2 ] );
$chunk = $this->getBusyLoop( $interpreter );
try {
$interpreter->callFunction( $chunk, 1e9 );
$this->fail( "Expected ScribuntoException was not thrown" );
} catch ( ScribuntoException $ex ) {
$this->assertSame( 'scribunto-common-timeout', $ex->messageName );
}
}
public function testTestMemoryLimit() {
$interpreter = $this->newInterpreter( [ 'memoryLimit' => 20 * 1e6 ] );
$chunk = $interpreter->loadString( '
t = {}
for i = 1, 10 do
t[#t + 1] = string.rep("x" .. i, 1000000)
end
',
'memoryLimit' );
try {
$interpreter->callFunction( $chunk );
$this->fail( "Expected ScribuntoException was not thrown" );
} catch ( ScribuntoException $ex ) {
$this->assertSame( 'scribunto-lua-error', $ex->messageName );
$this->assertSame( 'not enough memory', $ex->messageArgs[1] );
}
}
public function testWrapPHPFunction() {
$interpreter = $this->newInterpreter();
$func = $interpreter->wrapPhpFunction( function ( $n ) {
return [ 42, $n ];
} );
$res = $interpreter->callFunction( $func, 'From PHP' );
$this->assertEquals( [ 42, 'From PHP' ], $res );
$chunk = $interpreter->loadString( '
f = ...
return f( "From Lua" )
',
'wrappedPhpFunction' );
$res = $interpreter->callFunction( $chunk, $func );
$this->assertEquals( [ 42, 'From Lua' ], $res );
}
}
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