forked from jestjs/jest
/
array.ts
71 lines (57 loc) · 2.43 KB
/
array.ts
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/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
*/
import * as util from 'util';
import type {Global} from '@jest/types';
import {format as pretty} from 'pretty-format';
import type {EachTests} from '../bind';
const SUPPORTED_PLACEHOLDERS = /%[sdifjoOp]/g;
const PRETTY_PLACEHOLDER = '%p';
const INDEX_PLACEHOLDER = '%#';
const PLACEHOLDER_PREFIX = '%';
const ESCAPED_PLACEHOLDER_PREFIX = /%%/g;
const JEST_EACH_PLACEHOLDER_ESCAPE = '@@__JEST_EACH_PLACEHOLDER_ESCAPE__@@';
export default (title: string, arrayTable: Global.ArrayTable): EachTests =>
normaliseTable(arrayTable).map((row, index) => ({
arguments: row,
title: formatTitle(title, row, index),
}));
const normaliseTable = (table: Global.ArrayTable): Global.Table =>
isTable(table) ? table : table.map(colToRow);
const isTable = (table: Global.ArrayTable): table is Global.Table =>
table.every(Array.isArray);
const colToRow = (col: Global.Col): Global.Row => [col];
const formatTitle = (
title: string,
row: Global.Row,
rowIndex: number,
): string =>
row
.reduce<string>((formattedTitle, value) => {
const [placeholder] = getMatchingPlaceholders(formattedTitle);
const normalisedValue = normalisePlaceholderValue(value);
if (!placeholder) return formattedTitle;
if (placeholder === PRETTY_PLACEHOLDER)
return interpolatePrettyPlaceholder(formattedTitle, normalisedValue);
return util.format(formattedTitle, normalisedValue);
}, interpolateTitleIndex(interpolateEscapedPlaceholders(title), rowIndex))
.replace(new RegExp(JEST_EACH_PLACEHOLDER_ESCAPE, 'g'), PLACEHOLDER_PREFIX);
const normalisePlaceholderValue = (value: unknown) =>
typeof value === 'string'
? value.replace(
new RegExp(PLACEHOLDER_PREFIX, 'g'),
JEST_EACH_PLACEHOLDER_ESCAPE,
)
: value;
const getMatchingPlaceholders = (title: string) =>
title.match(SUPPORTED_PLACEHOLDERS) || [];
const interpolateEscapedPlaceholders = (title: string) =>
title.replace(ESCAPED_PLACEHOLDER_PREFIX, JEST_EACH_PLACEHOLDER_ESCAPE);
const interpolateTitleIndex = (title: string, index: number) =>
title.replace(INDEX_PLACEHOLDER, index.toString());
const interpolatePrettyPlaceholder = (title: string, value: unknown) =>
title.replace(PRETTY_PLACEHOLDER, pretty(value, {maxDepth: 1, min: true}));