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LinesOfALargeFileTestCase.php
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Mon, Mar 3, 22:21

LinesOfALargeFileTestCase.php
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<?php
/**
* @group testcase
*/
final class LinesOfALargeFileTestCase extends PhutilTestCase {
public function testBasics() {
$this->writeAndRead(
'abcd',
array(
'abcd',
));
}
public function testTerminalDelimiterPresent() {
$this->writeAndRead(
"bat\ncat\ndog\n",
array(
'bat',
'cat',
'dog',
));
}
public function testTerminalDelimiterAbsent() {
$this->writeAndRead(
"bat\ncat\ndog",
array(
'bat',
'cat',
'dog',
));
}
public function testChangeDelimiter() {
$this->writeAndRead(
"bat\1cat\1dog\1",
array(
'bat',
'cat',
'dog',
),
"\1");
}
public function testEmptyLines() {
$this->writeAndRead(
"\n\nbat\n",
array(
'',
'',
'bat',
));
}
public function testLargeFile() {
$line = 'The quick brown fox jumps over the lazy dog.';
$n = 100;
$this->writeAndRead(
str_repeat($line."\n", $n),
array_fill(0, $n, $line));
}
public function testLongLine() {
$line = str_repeat('x', 64 * 1024);
$this->writeAndRead($line, array($line));
}
public function testReadFailure() {
$caught = null;
try {
$f = new LinesOfALargeFile('/does/not/exist.void');
$f->rewind();
} catch (FilesystemException $ex) {
$caught = $ex;
}
$this->assertTrue($caught instanceof $ex);
}
public function testLineFilter() {
$write = "bat\ncat\ndog\nBat\nCat\nDog\n";
$read = array(
1 => 'cat',
4 => 'Cat',
);
$tmp = new TempFile();
Filesystem::writeFile($tmp, $write);
$lines = array();
$iterator = new PhutilCallbackFilterIterator(
new LinesOfALargeFile($tmp),
array($this, 'allowCatsOnly'));
foreach ($iterator as $n => $line) {
$lines[$n - 1] = $line;
}
$this->assertEqual(
$read,
$lines,
'Write: '.phutil_utf8_shorten($write, 32));
}
public function allowCatsOnly($line) {
$line = strtoupper($line);
if ($line != 'CAT') {
return null;
}
return $line;
}
private function writeAndRead($write, $read, $delimiter = "\n") {
$tmp = new TempFile();
Filesystem::writeFile($tmp, $write);
$lines = array();
$iterator = id(new LinesOfALargeFile($tmp))->setDelimiter($delimiter);
foreach ($iterator as $n => $line) {
$lines[$n - 1] = $line;
}
$this->assertEqual(
$read,
$lines,
'Write: '.phutil_utf8_shorten($write, 32));
}
}

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