StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics https://doi.org/10.1109/TVCG.2020.3030352
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StackGenVis/frontend/node_modules/trim-leading-lines/test.js

104 lines
2.7 KiB

'use strict';
require('mocha');
var assert = require('assert');
var trimLeadingLines = require('./');
describe('trim-leading-lines', function() {
it('should export a function', function() {
assert.equal(typeof trimLeadingLines, 'function');
});
it('should throw an error when invalid args are passed', function(cb) {
try {
trimLeadingLines();
cb(new Error('expected an error'));
} catch (err) {
assert(err);
assert.equal(err.message, 'expected a string');
cb();
}
});
it('should return empty strings', function() {
assert.equal(trimLeadingLines(''), '');
});
it('should return original string if no newlines', function() {
assert.equal(trimLeadingLines('foo'), 'foo');
});
it('should trim leading whitespace lines', function() {
var fixture = [
' ',
' ',
' ',
' ',
' GNU AFFERO GENERAL PUBLIC LICENSE',
' Version 3, 19 November 2007',
'',
].join('\n');
var expected = [
' GNU AFFERO GENERAL PUBLIC LICENSE',
' Version 3, 19 November 2007',
'',
].join('\n');
assert.equal(trimLeadingLines(fixture), expected);
});
it('should trim leading empty lines', function() {
var fixture = [
'',
'',
'',
'',
' GNU AFFERO GENERAL PUBLIC LICENSE',
' Version 3, 19 November 2007',
'',
].join('\n');
var expected = [
' GNU AFFERO GENERAL PUBLIC LICENSE',
' Version 3, 19 November 2007',
'',
].join('\n');
assert.equal(trimLeadingLines(fixture), expected);
});
it('should trim a mixture of leading empty and whitepace lines', function() {
var fixture = [
' ',
'',
' ',
'',
' GNU AFFERO GENERAL PUBLIC LICENSE',
' Version 3, 19 November 2007',
'',
].join('\n');
var expected = [
' GNU AFFERO GENERAL PUBLIC LICENSE',
' Version 3, 19 November 2007',
'',
].join('\n');
assert.equal(trimLeadingLines(fixture), expected);
});
it('should not trim intermediate whitespace lines', function() {
var fixture = [
' GNU AFFERO GENERAL PUBLIC LICENSE',
' ',
' ',
' ',
' ',
' Version 3, 19 November 2007',
'',
].join('\n');
assert.equal(trimLeadingLines(fixture), fixture);
});
});