calculateMaximumColumnWidthIndex.js
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import {
expect
} from 'chai';
import chalk from 'chalk';
import calculateMaximumColumnWidthIndex from './../src/calculateMaximumColumnWidthIndex';
describe('calculateMaximumColumnWidthIndex', () => {
it('throws an error when attempting to calculate maximum column value index for an empty data set', () => {
expect(() => {
calculateMaximumColumnWidthIndex([]);
}).to.throw(Error, 'Dataset must have at least one row.');
});
it('calculates the maximum column value index', () => {
const maximumColumnValueIndex = calculateMaximumColumnWidthIndex([
[
'',
'a',
'b',
'c'
],
[
'',
'a',
'bbbbbbbbbb',
'c'
],
[
'',
'',
'b',
'ccccc'
]
]);
expect(maximumColumnValueIndex).to.deep.equal([0, 1, 10, 5]);
});
context('cell values contain ANSI codes', () => {
it('uses visual width of the string', () => {
const maximumColumnValueIndex = calculateMaximumColumnWidthIndex([
[
chalk.red('aaaaa')
]
]);
expect(maximumColumnValueIndex[0]).to.equal(5);
});
});
context('cell values contain fullwidth characters', () => {
it('uses visual width of the string', () => {
const maximumColumnValueIndex = calculateMaximumColumnWidthIndex([
[
chalk.red('古')
]
]);
expect(maximumColumnValueIndex[0]).to.equal(2);
});
});
});