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string_test.dart
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import 'dart:convert';
import 'package:dartx/dartx.dart';
import 'package:test/test.dart';
void main() {
group('StringX', () {
test('.chars', () {
// ignore: deprecated_member_use_from_same_package
expect('test12'.chars, ['t', 'e', 's', 't', '1', '2']);
expect('test12'.characters, ['t', 'e', 's', 't', '1', '2']);
// ignore: deprecated_member_use_from_same_package
expect('ഐ⌛酪Б👨👨👧👦'.chars, ['ഐ', '⌛', '酪', 'Б', '👨👨👧👦']);
expect('ഐ⌛酪Б👨👨👧👦'.characters, ['ഐ', '⌛', '酪', 'Б', '👨👨👧👦']);
});
test('.capitalize()', () {
expect(''.capitalize(), '');
expect('123'.capitalize(), '123');
expect('t'.capitalize(), 'T');
expect('test'.capitalize(), 'Test');
expect('Test'.capitalize(), 'Test');
});
test('.decapitalize()', () {
expect(''.decapitalize(), '');
expect('123'.decapitalize(), '123');
expect('T'.decapitalize(), 't');
expect('Test'.decapitalize(), 'test');
expect('test'.decapitalize(), 'test');
});
test('.isAscii', () {
expect('!jI7) ~'.isAscii, true);
expect('§3'.isAscii, false);
});
test('.isLatin1', () {
expect('!jI7) ~§Êü'.isLatin1, true);
expect('ő'.isLatin1, false);
});
test('.isBlank', () {
expect(' '.isBlank, true);
expect(' . '.isBlank, false);
});
test('.isNotBlank', () {
expect(' '.isNotBlank, false);
expect(' . '.isNotBlank, true);
});
test('.isUpperCase', () {
expect(''.isUpperCase, false);
expect(' '.isUpperCase, false);
expect('\n'.isUpperCase, false);
expect('0'.isUpperCase, false);
expect('!'.isUpperCase, false);
expect('ß'.isUpperCase, false);
expect('Ä'.isUpperCase, true);
expect('TESt'.isUpperCase, false);
expect('TEST'.isUpperCase, true);
expect('HEY, YOU!'.isUpperCase, true);
});
test('.isLowerCase', () {
expect(''.isLowerCase, false);
expect(' '.isLowerCase, false);
expect('\n'.isLowerCase, false);
expect('0'.isLowerCase, false);
expect('!'.isLowerCase, false);
// This function uses the language independent Unicode mapping and thus
// only works in some languages.
//
// Doesn't work:
// expect('ß'.isLowerCase, true);
//
// Reason:
// 'ß'.toUpperCase // 'ß'
expect('groß'.isLowerCase, true);
expect('ä'.isLowerCase, true);
expect('tesT'.isLowerCase, false);
expect('test'.isLowerCase, true);
expect('hey, you!'.isLowerCase, true);
});
test('.isCapitalized', () {
expect(''.isCapitalized, false);
expect('tEST'.isCapitalized, false);
expect('Test'.isCapitalized, true);
});
test('.isDecapitalized', () {
expect(''.isDecapitalized, false);
expect('Test'.isDecapitalized, false);
expect('tEST'.isDecapitalized, true);
});
test('.reversed', () {
expect(''.reversed, '');
expect('test👨👨👧👦'.reversed, '👨👨👧👦tset');
});
test('.isInt', () {
expect(''.isInt, false);
expect('a'.isInt, false);
expect('1.0'.isInt, false);
expect('1'.isInt, true);
expect('123456789'.isInt, true);
});
group('.toInt()', () {
test('with radix', () {
expect('100'.toInt(radix: 2), 4);
expect('100'.toInt(radix: 16), 256);
expect('FF'.toInt(radix: 16), 255);
});
test('without radix', () {
expect('0'.toInt(), 0);
expect('1'.toInt(), 1);
expect('123456789'.toInt(), 123456789);
});
});
test('.toIntOrNull()', () {
expect(''.toIntOrNull(), null);
expect('a'.toIntOrNull(), null);
expect('1.0'.toIntOrNull(), null);
expect('1'.toIntOrNull(), 1);
expect('123456789'.toIntOrNull(), 123456789);
});
test('.isDouble', () {
expect(''.isDouble, false);
expect('a'.isDouble, false);
expect('1'.isDouble, true);
expect('1.0'.isDouble, true);
expect('123456789.987654321'.isDouble, true);
});
test('.toDouble()', () {
expect('0'.toDouble(), 0.0);
expect('0.0'.toDouble(), 0.0);
expect('1'.toDouble(), 1.0);
expect('123456789.987654321'.toDouble(), 123456789.987654321);
});
test('.toDoubleOrNull()', () {
expect(''.toDoubleOrNull(), null);
expect('a'.toDoubleOrNull(), null);
expect('1.123'.toDoubleOrNull(), 1.123);
expect('1'.toDoubleOrNull(), 1.0);
expect('123456789.987654321'.toDoubleOrNull(), 123456789.987654321);
});
test('.isNullOrEmpty', () {
expect(null.isNullOrEmpty, true);
expect(''.isNullOrEmpty, true);
expect(' '.isNullOrEmpty, false);
expect('\n'.isNullOrEmpty, false);
});
test('.isNotNullOrEmpty', () {
expect(null.isNotNullOrEmpty, false);
expect(''.isNotNullOrEmpty, false);
expect(' '.isNotNullOrEmpty, true);
expect('\n'.isNotNullOrEmpty, true);
});
test('.orEmpty', () {
String? value;
expect(value.orEmpty(), '');
expect('hi'.orEmpty(), 'hi');
expect(''.orEmpty(), '');
});
test('.toUtf8()', () {
expect(''.toUtf8(), []);
expect('hello'.toUtf8(), [104, 101, 108, 108, 111]);
expect('ഐ⌛酪Б👨👨👧👦'.toUtf8(), utf8.encode('ഐ⌛酪Б👨👨👧👦'));
});
test('.toUtf16()', () {
expect(''.toUtf16(), []);
expect('hello'.toUtf16(), [104, 101, 108, 108, 111]);
expect('ഐ⌛酪Б👨👨👧👦'.toUtf16(), 'ഐ⌛酪Б👨👨👧👦'.codeUnits);
});
test('.md5()', () {
expect(''.md5, 'd41d8cd98f00b204e9800998ecf8427e');
expect('a'.md5, '0cc175b9c0f1b6a831c399e269772661');
expect('abc'.md5, '900150983cd24fb0d6963f7d28e17f72');
expect('message digest'.md5, 'f96b697d7cb7938d525a2f31aaf161d0');
expect('ഐ⌛酪Б👨👨👧👦'.md5, 'c7834eff7c967101cfb65b8f6d15ad46');
expect(
'abcdefghijklmnopqrstuvwxyz'.md5,
'c3fcd3d76192e4007dfb496cca67e13b',
);
expect(
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'.md5,
'd174ab98d277d9f5a5611c2c9f419d9f',
);
expect(
'12345678901234567890123456789012345678901234567890123456789012'
'345678901234567890'
.md5,
'57edf4a22be3c955ac49da2e2107b67a',
);
});
test('.removePrefix()', () {
expect('abc def ghi'.removePrefix('abc'), ' def ghi');
expect(' abc def ghi'.removePrefix('abc'), ' abc def ghi');
expect('12345'.removePrefix('123456'), '12345');
expect('text'.removePrefix(''), 'text');
expect('🎉🌟'.removePrefix('🎉'), '🌟');
const expected = 'sameInstance';
expect(expected.removePrefix(''), same(expected));
});
test('.removeSuffix()', () {
expect('abc def ghi'.removeSuffix('ghi'), 'abc def ');
expect('abc def ghi '.removeSuffix('ghi'), 'abc def ghi ');
expect('12345'.removeSuffix('012345'), '12345');
expect('text'.removeSuffix(''), 'text');
expect('🎉🌟'.removeSuffix('🌟'), '🎉');
const expected = 'sameInstance';
expect(expected.removeSuffix(''), same(expected));
});
test('.removeSurrounding()', () {
expect(
'abc def ghi'.removeSurrounding(prefix: 'abc', suffix: 'ghi'),
' def ',
);
expect(
'abc def ghi '.removeSurrounding(prefix: 'abc', suffix: 'ghi'),
'abc def ghi ',
);
expect('12345'.removeSurrounding(prefix: '12', suffix: '45'), '3');
expect(
'<p>This is HTML</p>'.removeSurrounding(prefix: '<p>', suffix: '</p>'),
'This is HTML',
);
expect('🎉😊🌟'.removeSurrounding(prefix: '🎉', suffix: '🌟'), '😊');
const expected = 'sameInstance';
expect(
expected.removeSurrounding(prefix: '', suffix: ''),
same(expected),
);
});
test('.slice()', () {
expect('awesomeString'.slice(0, 6), 'awesome');
expect('awesomeString'.slice(0, -7), 'awesome');
expect('awesomeString'.slice(7), 'String');
expect('awesomeString'.slice(-6), 'String');
// ignore: avoid_redundant_argument_values
expect('awesomeString'.slice(-6, -1), 'String');
expect('awesomeString'.slice(-6, 8), 'St');
expect('awesomeString'.slice(0), 'awesomeString');
expect(() => ''.slice(0), throwsRangeError);
expect(() => ''.slice(0, 1), throwsRangeError);
expect(() => ''.slice(-1), throwsRangeError);
// ignore: avoid_redundant_argument_values
expect(() => ''.slice(0, -1), throwsRangeError);
expect(() => 'awesomeString'.slice(1, 13), throwsRangeError);
expect(() => 'awesomeString'.slice(2, 1), throwsRangeError);
expect(() => 'awesomeString'.slice(13), throwsRangeError);
expect(() => 'awesomeString'.slice(-14), throwsRangeError);
expect(() => 'awesomeString'.slice(-1, -2), throwsRangeError);
});
test('.matches()', () {
expect('as'.matches(RegExp(r'^.s$')), true);
expect('mst'.matches(RegExp(r'^.s$')), false);
});
test('.isHttp', () {
expect('http://www.example.com'.isHttp, true);
expect('https://www.example.com'.isHttp, true);
expect('htt://www//'.isHttp, false);
});
test('url coding', () {
const originalUrl = 'Hello Ladies + Gentlemen, a signed OAuth request!';
final encodingUrl = originalUrl.urlEncode;
expect(
encodingUrl,
'Hello%20Ladies%20+%20Gentlemen,%20a%20signed%20OAuth%20request!',
);
final decodedUrl = originalUrl.urlDecode;
expect(decodedUrl, originalUrl);
});
});
group('StringBuffer', () {
test('.writeSpace()', () {
final buffer = StringBuffer();
buffer.writeSpace();
expect(buffer.isNotEmpty, true);
expect(buffer.length, 1);
expect(buffer.toString(), ' ');
});
test('buildString()', () {
expect(buildString((it) => it.write('test')), 'test');
expect(
buildString((it) {
for (var i = 0; i < 10; i++) {
it.write(i);
}
}),
'0123456789',
);
});
});
}