Be able to parse CSV from STDIN

[miya0001]

Related:
wp-cli/entity-command#96

[miya0001]

@wp-cli/committers
Do you know how test STDIN with phpunit?

[gitlost]

For just unit testing Iterators\CSV, exec is your man:

<?php

class IteratorsTest extends PHPUnit_Framework_TestCase {
	
	function testIteratorsCSVStdin() {

		$php = "require '" . dirname( __DIR__ ) . "/php/WP_CLI/Iterators/CSV.php';\n";
		$php .= <<<'EOD'
$iterator = new WP_CLI\Iterators\CSV( '-' );
foreach( $iterator as $i => $line ) {
	echo "$i";
	foreach ( $line as $j => $field ) echo ":$field";
	echo "\n";
}
EOD;

		$stdin = <<<'EOD'
user_login,user_email,display_name,role
stdinuser1,bobjones@example.com,Bob Jones,contributor
stdinuser2,newuser1@example.com,New User,author
existinguser,existinguser@example.com,Existing User,administrator
EOD;

		$stdin = escapeshellarg( $stdin );
		$php = escapeshellarg( $php );

		$output = array();
		exec( "echo $stdin | php -r $php", $output );

		$this->assertSame( 3, count( $output ) );
		$this->assertSame( '0:stdinuser1:bobjones@example.com:Bob Jones:contributor', $output[0] );
	}
}

[danielbachhuber]

I think it's too magical (also known as unexpected) to interpret - as STDIN.

For the purposes of wp-cli/entity-command#96, we should simply read STDIN to memory, and then parse as CSV.

[miya0001]

@gitlost Thanks, you always help me a lot. 😊
@danielbachhuber OK, I opened new PR. wp-cli/entity-command#100

Thanks again!