index.test-d.ts

import { expectType, expectError } from "tsd";
import jsTokens, { Token } from ".";
import { JSXToken } from "./build";

// Requires one string:
expectError(jsTokens());
expectError(jsTokens(123));
expectError(jsTokens("", ""));

// Does not return an array:
expectError(jsTokens("").slice());

expectType<Array<Token>>([...jsTokens("")]);
expectType<Array<Token>>([...jsTokens("", {})]);
expectType<Array<Token>>([...jsTokens("", { jsx: false })]);
expectType<Array<Token | JSXToken>>([...jsTokens("", { jsx: true })]);

for (const token of jsTokens("")) {
  expectType<Token>(token);
}

for (const token of jsTokens("", { jsx: true })) {
  expectType<Token | JSXToken>(token);
}

const tokens: Array<string> = Array.from(jsTokens(""), (token) => {
  switch (token.type) {
    case "StringLiteral":
      expectType<boolean>(token.closed);
      return token.value;

    case "NoSubstitutionTemplate":
      expectType<boolean>(token.closed);
      return token.value;

    case "TemplateHead":
      expectError(token.closed);
      return token.value;

    case "TemplateMiddle":
      expectError(token.closed);
      return token.value;

    case "TemplateTail":
      expectType<boolean>(token.closed);
      return token.value;

    case "RegularExpressionLiteral":
      expectType<boolean>(token.closed);
      return token.value;

    case "MultiLineComment":
      expectType<boolean>(token.closed);
      return token.value;

    case "SingleLineComment":
      expectError(token.closed);
      return token.value;

    case "HashbangComment":
      expectError(token.closed);
      return token.value;

    case "IdentifierName":
      expectError(token.closed);
      return token.value;

    case "PrivateIdentifier":
      expectError(token.closed);
      return token.value;

    case "NumericLiteral":
      expectError(token.closed);
      return token.value;

    case "Punctuator":
      expectError(token.closed);
      return token.value;

    case "WhiteSpace":
      expectError(token.closed);
      return token.value;

    case "LineTerminatorSequence":
      expectError(token.closed);
      return token.value;

    case "Invalid":
      expectError(token.closed);
      return token.value;
  }
});

expectType<Array<string>>(tokens);

const jsxTokens: Array<string> = Array.from(
  jsTokens("", { jsx: true }),
  (token) => {
    switch (token.type) {
      case "StringLiteral":
        expectType<boolean>(token.closed);
        return token.value;

      case "NoSubstitutionTemplate":
        expectType<boolean>(token.closed);
        return token.value;

      case "TemplateHead":
        expectError(token.closed);
        return token.value;

      case "TemplateMiddle":
        expectError(token.closed);
        return token.value;

      case "TemplateTail":
        expectType<boolean>(token.closed);
        return token.value;

      case "RegularExpressionLiteral":
        expectType<boolean>(token.closed);
        return token.value;

      case "MultiLineComment":
        expectType<boolean>(token.closed);
        return token.value;

      case "SingleLineComment":
        expectError(token.closed);
        return token.value;

      case "HashbangComment":
        expectError(token.closed);
        return token.value;

      case "IdentifierName":
        expectError(token.closed);
        return token.value;

      case "PrivateIdentifier":
        expectError(token.closed);
        return token.value;

      case "NumericLiteral":
        expectError(token.closed);
        return token.value;

      case "Punctuator":
        expectError(token.closed);
        return token.value;

      case "WhiteSpace":
        expectError(token.closed);
        return token.value;

      case "LineTerminatorSequence":
        expectError(token.closed);
        return token.value;

      case "Invalid":
        expectError(token.closed);
        return token.value;

      case "JSXString":
        expectType<boolean>(token.closed);
        return token.value;

      case "JSXText":
        expectError(token.closed);
        return token.value;

      case "JSXIdentifier":
        expectError(token.closed);
        return token.value;

      case "JSXPunctuator":
        expectError(token.closed);
        return token.value;

      case "JSXInvalid":
        expectError(token.closed);
        return token.value;
    }
  },
);

expectType<Array<string>>(jsxTokens);