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->assertEqual(true, $caught instanceof $ex);
	}

	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 $line) {
	$lines[] = $line;
	}

	$this->assertEqual(
	$read,
	$lines,
	"Write: ".phutil_utf8_shorten($write, 32));
	}

	}