/**

* @license Apache-2.0

*

* Copyright (c) 2021 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 tape = require( 'tape' );

var substringBefore = require( './../lib' );

// TESTS //

tape( 'main export is a function', function test( t ) {

t.ok( true, __filename );

t.strictEqual( typeof substringBefore, 'function', 'main export is a function' );

t.end();

});

tape( 'the function throws an error if not provided a string primitive as its first argument', function test( t ) {

var values;

var i;

values = [

5,

NaN,

null,

void 0,

true,

[],

{},

function noop() {}

];

for ( i = 0; i < values.length; i++ ) {

t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );

}

t.end();

function badValue( value ) {

return function badValue() {

substringBefore( value, 'beep' );

};

}

});

tape( 'the function throws an error if not provided a string primitive as its second argument', function test( t ) {

var values;

var i;

values = [

5,

NaN,

null,

void 0,

true,

[],

{},

function noop() {}

];

for ( i = 0; i < values.length; i++ ) {

t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );

}

t.end();

function badValue( value ) {

return function badValue() {

substringBefore( 'beep boop', value );

};

}

});

tape( 'the function returns the substring before a provided search string', function test( t ) {

var expected;

var actual;

var str;

str = 'beep boop';

actual = substringBefore( str, ' ' );

expected = 'beep';

t.strictEqual( actual, expected, 'returns expected value' );

str = 'beep boop';

actual = substringBefore( str, 'p' );

expected = 'bee';

t.strictEqual( actual, expected, 'returns expected value' );

str = 'Hello, World!';

actual = substringBefore( str, 'o' );

expected = 'Hell';

t.strictEqual( actual, expected, 'returns expected value' );

t.end();

});

tape( 'the function returns the substring before a provided search string (Unicode characters)', function test( t ) {

var expected;

var actual;

var str;

str = 'beep 😀 boop 😀 baz';

actual = substringBefore( str, '😀' );

expected = 'beep ';

t.strictEqual( actual, expected, 'returns expected value' );

str = '🤖 Robot army 🤖!';

actual = substringBefore( str, '🤖' );

expected = '';

str = '🐺 Wolf brothers 🐺';

actual = substringBefore( str, 'o' );

expected = '🐺 W';

t.end();

});

tape( 'the function returns the entire string if the search string is not found', function test( t ) {

var expected;

var actual;

var str;

str = 'beep boop';

actual = substringBefore( str, 'z' );

expected = 'beep boop';

t.strictEqual( actual, expected, 'returns expected value' );

str = 'beep boop';

actual = substringBefore( str, 'baz' );

expected = 'beep boop';

t.strictEqual( actual, expected, 'returns expected value' );

t.end();

});

tape( 'the function returns the empty string if the search string is the empty string', function test( t ) {

var expected;

var actual;

var str;

str = 'beep boop';

actual = substringBefore( str, '' );

expected = '';

t.strictEqual( actual, expected, 'returns expected value' );

t.end();

});