/
validation.ts
101 lines (87 loc) · 2.76 KB
/
validation.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 chalk = require('chalk');
import type {Global} from '@jest/types';
import {format as pretty} from 'pretty-format';
type TemplateData = Global.TemplateData;
const EXPECTED_COLOR = chalk.green;
const RECEIVED_COLOR = chalk.red;
export const validateArrayTable = (table: unknown): void => {
if (!Array.isArray(table)) {
throw new Error(
'`.each` must be called with an Array or Tagged Template Literal.\n\n' +
`Instead was called with: ${pretty(table, {
maxDepth: 1,
min: true,
})}\n`,
);
}
if (isTaggedTemplateLiteral(table)) {
if (isEmptyString(table[0])) {
throw new Error(
'Error: `.each` called with an empty Tagged Template Literal of table data.\n',
);
}
throw new Error(
'Error: `.each` called with a Tagged Template Literal with no data, remember to interpolate with ${expression} syntax.\n',
);
}
if (isEmptyTable(table)) {
throw new Error(
'Error: `.each` called with an empty Array of table data.\n',
);
}
};
const isTaggedTemplateLiteral = (array: any) => array.raw !== undefined;
const isEmptyTable = (table: Array<unknown>) => table.length === 0;
const isEmptyString = (str: string | unknown) =>
typeof str === 'string' && str.trim() === '';
export const validateTemplateTableArguments = (
headings: Array<string>,
data: TemplateData,
): void => {
const missingData = data.length % headings.length;
if (missingData > 0) {
throw new Error(
'Not enough arguments supplied for given headings:\n' +
EXPECTED_COLOR(headings.join(' | ')) +
'\n\n' +
'Received:\n' +
RECEIVED_COLOR(pretty(data)) +
'\n\n' +
`Missing ${RECEIVED_COLOR(missingData.toString())} ${pluralize(
'argument',
missingData,
)}`,
);
}
};
const pluralize = (word: string, count: number) =>
word + (count === 1 ? '' : 's');
const START_OF_LINE = '^';
const NEWLINE = '\\n';
const HEADING = '\\s*[^\\s]+\\s*';
const PIPE = '\\|';
const REPEATABLE_HEADING = `(${PIPE}${HEADING})*`;
const HEADINGS_FORMAT = new RegExp(
START_OF_LINE + NEWLINE + HEADING + REPEATABLE_HEADING + NEWLINE,
'g',
);
export const extractValidTemplateHeadings = (headings: string): string => {
const matches = headings.match(HEADINGS_FORMAT);
if (matches === null) {
throw new Error(
'Table headings do not conform to expected format:\n\n' +
EXPECTED_COLOR('heading1 | headingN') +
'\n\n' +
'Received:\n\n' +
RECEIVED_COLOR(pretty(headings)),
);
}
return matches[0];
};