/**
* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var resolve = require( 'path' ).resolve;
var join = require( 'path' ).join;
var exec = require( 'child_process' ).exec;
var tape = require( 'tape' );
var IS_BROWSER = require( '@stdlib/assert/is-browser' );
var IS_WINDOWS = require( '@stdlib/assert/is-windows' );
var readFileSync = require( '@stdlib/fs/read-file' ).sync;
var evil = require( '@stdlib/utils/eval' );


// VARIABLES //

var fpath = resolve( __dirname, '..', 'bin', 'cli' );
var opts = {
	'skip': IS_BROWSER || IS_WINDOWS
};


// FIXTURES //

var PKG_VERSION = require( './../package.json' ).version;


// TESTS //

tape( 'command-line interface', function test( t ) {
	t.ok( true, __filename );
	t.end();
});

tape( 'when invoked with a `--help` flag, the command-line interface prints the help text to `stderr`', opts, function test( t ) {
	var expected;
	var cmd;

	expected = readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
		'encoding': 'utf8'
	});
	cmd = [
		process.execPath,
		fpath,
		'--help'
	];

	exec( cmd.join( ' ' ), done );

	function done( error, stdout, stderr ) {
		if ( error ) {
			t.fail( error.message );
		} else {
			t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
			t.strictEqual( stderr.toString(), expected+'\n', 'expected value' );
		}
		t.end();
	}
});

tape( 'when invoked with a `-h` flag, the command-line interface prints the help text to `stderr`', opts, function test( t ) {
	var expected;
	var cmd;

	expected = readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
		'encoding': 'utf8'
	});
	cmd = [
		process.execPath,
		fpath,
		'-h'
	];

	exec( cmd.join( ' ' ), done );

	function done( error, stdout, stderr ) {
		if ( error ) {
			t.fail( error.message );
		} else {
			t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
			t.strictEqual( stderr.toString(), expected+'\n', 'expected value' );
		}
		t.end();
	}
});

tape( 'when invoked with a `--version` flag, the command-line interface prints the version to `stderr`', opts, function test( t ) {
	var cmd = [
		process.execPath,
		fpath,
		'--version'
	];

	exec( cmd.join( ' ' ), done );

	function done( error, stdout, stderr ) {
		if ( error ) {
			t.fail( error.message );
		} else {
			t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
			t.strictEqual( stderr.toString(), PKG_VERSION+'\n', 'expected value' );
		}
		t.end();
	}
});

tape( 'when invoked with a `-V` flag, the command-line interface prints the version to `stderr`', opts, function test( t ) {
	var cmd = [
		process.execPath,
		fpath,
		'-V'
	];

	exec( cmd.join( ' ' ), done );

	function done( error, stdout, stderr ) {
		if ( error ) {
			t.fail( error.message );
		} else {
			t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
			t.strictEqual( stderr.toString(), PKG_VERSION+'\n', 'expected value' );
		}
		t.end();
	}
});

tape( 'the command-line interface generates a bundle', opts, function test( t ) {
	var cmd = [
		process.execPath,
		fpath,
		join( __dirname, 'fixtures' ),
		'--pattern',
		'*.js'
	];

	exec( cmd.join( ' ' ), done );

	function done( error, stdout, stderr ) {
		if ( error ) {
			t.fail( error.message );
		} else {
			t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
			try {
				evil( stdout.toString() );
				t.fail( 'should throw an error' );
			} catch ( err ) {
				t.equal( err.message, 'BEEP', 'has expected error message' );
			}
		}
		t.end();
	}
});

@@ -3635,16 +3635,597 @@
 %09fpath,%0A
+%09%09join( __dirname, 'fixtures' )%0A%09%5D;%0A%0A%09exec( cmd.join( ' ' ), done );%0A%0A%09function done( error, stdout, stderr ) %7B%0A%09%09if ( error ) %7B%0A%09%09%09t.fail( error.message );%0A%09%09%7D else %7B%0A%09%09%09t.strictEqual( stderr.toString(), '', 'does not print to %60stderr%60' );%0A%09%09%09try %7B%0A%09%09%09%09evil( stdout.toString() );%0A%09%09%09%09t.fail( 'should throw an error' );%0A%09%09%09%7D catch ( err ) %7B%0A%09%09%09%09t.equal( err.message, 'BEEP', 'has expected error message' );%0A%09%09%09%7D%0A%09%09%7D%0A%09%09t.end();%0A%09%7D%0A%7D);%0A%0Atape( 'the command-line interface supports providing a custom glob pattern', opts, function test( t ) %7B%0A%09var cmd = %5B%0A%09%09process.execPath,%0A%09%09fpath,%0A
 %09%09join( 

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