fast-check
Version:
Property based testing framework for JavaScript (like QuickCheck)
160 lines (159 loc) • 8.41 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.stringMatching = stringMatching;
const globals_1 = require("../utils/globals");
const stringify_1 = require("../utils/stringify");
const SanitizeRegexAst_1 = require("./_internals/helpers/SanitizeRegexAst");
const TokenizeRegex_1 = require("./_internals/helpers/TokenizeRegex");
const constant_1 = require("./constant");
const constantFrom_1 = require("./constantFrom");
const integer_1 = require("./integer");
const oneof_1 = require("./oneof");
const string_1 = require("./string");
const tuple_1 = require("./tuple");
const safeStringFromCodePoint = String.fromCodePoint;
const wordChars = [...'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_'];
const digitChars = [...'0123456789'];
const spaceChars = [...' \t\r\n\v\f'];
const newLineChars = [...'\r\n'];
const terminatorChars = [...'\x1E\x15'];
const newLineAndTerminatorChars = [...newLineChars, ...terminatorChars];
const defaultChar = () => (0, string_1.string)({ unit: 'grapheme-ascii', minLength: 1, maxLength: 1 });
function raiseUnsupportedASTNode(astNode) {
return new globals_1.Error(`Unsupported AST node! Received: ${(0, stringify_1.stringify)(astNode)}`);
}
function toMatchingArbitrary(astNode, constraints, flags) {
switch (astNode.type) {
case 'Char': {
if (astNode.kind === 'meta') {
switch (astNode.value) {
case '\\w': {
return (0, constantFrom_1.constantFrom)(...wordChars);
}
case '\\W': {
return defaultChar().filter((c) => (0, globals_1.safeIndexOf)(wordChars, c) === -1);
}
case '\\d': {
return (0, constantFrom_1.constantFrom)(...digitChars);
}
case '\\D': {
return defaultChar().filter((c) => (0, globals_1.safeIndexOf)(digitChars, c) === -1);
}
case '\\s': {
return (0, constantFrom_1.constantFrom)(...spaceChars);
}
case '\\S': {
return defaultChar().filter((c) => (0, globals_1.safeIndexOf)(spaceChars, c) === -1);
}
case '\\b':
case '\\B': {
throw new globals_1.Error(`Meta character ${astNode.value} not implemented yet!`);
}
case '.': {
const forbiddenChars = flags.dotAll ? terminatorChars : newLineAndTerminatorChars;
return defaultChar().filter((c) => (0, globals_1.safeIndexOf)(forbiddenChars, c) === -1);
}
}
}
if (astNode.symbol === undefined) {
throw new globals_1.Error(`Unexpected undefined symbol received for non-meta Char! Received: ${(0, stringify_1.stringify)(astNode)}`);
}
return (0, constant_1.constant)(astNode.symbol);
}
case 'Repetition': {
const node = toMatchingArbitrary(astNode.expression, constraints, flags);
switch (astNode.quantifier.kind) {
case '*': {
return (0, string_1.string)({ ...constraints, unit: node });
}
case '+': {
return (0, string_1.string)({ ...constraints, minLength: 1, unit: node });
}
case '?': {
return (0, string_1.string)({ ...constraints, minLength: 0, maxLength: 1, unit: node });
}
case 'Range': {
return (0, string_1.string)({
...constraints,
minLength: astNode.quantifier.from,
maxLength: astNode.quantifier.to,
unit: node,
});
}
default: {
throw raiseUnsupportedASTNode(astNode.quantifier);
}
}
}
case 'Quantifier': {
throw new globals_1.Error(`Wrongly defined AST tree, Quantifier nodes not supposed to be scanned!`);
}
case 'Alternative': {
return (0, tuple_1.tuple)(...(0, globals_1.safeMap)(astNode.expressions, (n) => toMatchingArbitrary(n, constraints, flags))).map((vs) => (0, globals_1.safeJoin)(vs, ''));
}
case 'CharacterClass':
if (astNode.negative) {
const childrenArbitraries = (0, globals_1.safeMap)(astNode.expressions, (n) => toMatchingArbitrary(n, constraints, flags));
return defaultChar().filter((c) => (0, globals_1.safeEvery)(childrenArbitraries, (arb) => !arb.canShrinkWithoutContext(c)));
}
return (0, oneof_1.oneof)(...(0, globals_1.safeMap)(astNode.expressions, (n) => toMatchingArbitrary(n, constraints, flags)));
case 'ClassRange': {
const min = astNode.from.codePoint;
const max = astNode.to.codePoint;
return (0, integer_1.integer)({ min, max }).map((n) => safeStringFromCodePoint(n), (c) => {
if (typeof c !== 'string')
throw new globals_1.Error('Invalid type');
if ([...c].length !== 1)
throw new globals_1.Error('Invalid length');
return (0, globals_1.safeCharCodeAt)(c, 0);
});
}
case 'Group': {
return toMatchingArbitrary(astNode.expression, constraints, flags);
}
case 'Disjunction': {
const left = astNode.left !== null ? toMatchingArbitrary(astNode.left, constraints, flags) : (0, constant_1.constant)('');
const right = astNode.right !== null ? toMatchingArbitrary(astNode.right, constraints, flags) : (0, constant_1.constant)('');
return (0, oneof_1.oneof)(left, right);
}
case 'Assertion': {
if (astNode.kind === '^' || astNode.kind === '$') {
if (flags.multiline) {
if (astNode.kind === '^') {
return (0, oneof_1.oneof)((0, constant_1.constant)(''), (0, tuple_1.tuple)((0, string_1.string)({ unit: defaultChar() }), (0, constantFrom_1.constantFrom)(...newLineChars)).map((t) => `${t[0]}${t[1]}`, (value) => {
if (typeof value !== 'string' || value.length === 0)
throw new globals_1.Error('Invalid type');
return [(0, globals_1.safeSubstring)(value, 0, value.length - 1), value[value.length - 1]];
}));
}
else {
return (0, oneof_1.oneof)((0, constant_1.constant)(''), (0, tuple_1.tuple)((0, constantFrom_1.constantFrom)(...newLineChars), (0, string_1.string)({ unit: defaultChar() })).map((t) => `${t[0]}${t[1]}`, (value) => {
if (typeof value !== 'string' || value.length === 0)
throw new globals_1.Error('Invalid type');
return [value[0], (0, globals_1.safeSubstring)(value, 1)];
}));
}
}
return (0, constant_1.constant)('');
}
throw new globals_1.Error(`Assertions of kind ${astNode.kind} not implemented yet!`);
}
case 'Backreference': {
throw new globals_1.Error(`Backreference nodes not implemented yet!`);
}
default: {
throw raiseUnsupportedASTNode(astNode);
}
}
}
/**@__NO_SIDE_EFFECTS__*/function stringMatching(regex, constraints = {}) {
for (const flag of regex.flags) {
if (flag !== 'd' && flag !== 'g' && flag !== 'm' && flag !== 's' && flag !== 'u') {
throw new globals_1.Error(`Unable to use "stringMatching" against a regex using the flag ${flag}`);
}
}
const sanitizedConstraints = { size: constraints.size };
const flags = { multiline: regex.multiline, dotAll: regex.dotAll };
const regexRootToken = (0, SanitizeRegexAst_1.addMissingDotStar)((0, TokenizeRegex_1.tokenizeRegex)(regex));
return toMatchingArbitrary(regexRootToken, sanitizedConstraints, flags);
}