TypeScript pretty-format.default函數代碼示例

        it('serializes/deserializes in disk', () => {
          serializer.writeFileSync(file, obj);

          expect(prettyFormat(serializer.readFileSync(file))).toEqual(
            prettyFormat(obj),
          );
        });

      test('calls global test title with %p placeholder injected at the correct positions', () => {
        const globalTestMocks = getGlobalTestMocks();
        const eachObject = each.withGlobal(globalTestMocks)([
          ['string1', 'pretty1', 'string2', 'pretty2'],
          ['string1', 'pretty1', 'string2', 'pretty2'],
        ]);
        const testFunction = get(eachObject, keyPath);
        testFunction('expected string: %s %p %s %p', noop);

        const globalMock = get(globalTestMocks, keyPath);
        expect(globalMock).toHaveBeenCalledTimes(2);
        expect(globalMock).toHaveBeenCalledWith(
          `expected string: string1 ${pretty('pretty1')} string2 ${pretty(
            'pretty2',
          )}`,
          expectFunction,
          undefined,
        );
        expect(globalMock).toHaveBeenCalledWith(
          `expected string: string1 ${pretty('pretty1')} string2 ${pretty(
            'pretty2',
          )}`,
          expectFunction,
          undefined,
        );
      });

function comparePrimitive(
  a: number | boolean,
  b: number | boolean,
  options?: JestDiffOptions,
) {
  return diffStrings(
    prettyFormat(a, FORMAT_OPTIONS),
    prettyFormat(b, FORMAT_OPTIONS),
    options,
  );
}

  constructor(value: unknown) {
    if (isPrimitive(value)) {
      throw new TypeError(
        [
          'Primitives cannot leak memory.',
          'You passed a ' + typeof value + ': <' + prettyFormat(value) + '>',
        ].join(' '),
      );
    }

    let weak;

    try {
      // eslint-disable-next-line import/no-extraneous-dependencies
      weak = require('weak');
    } catch (err) {
      if (!err || err.code !== 'MODULE_NOT_FOUND') {
        throw err;
      }

      throw new Error(
        'The leaking detection mechanism requires the "weak" package to be installed and work. ' +
          'Please install it as a dependency on your main project',
      );
    }

    weak(value, () => (this._isReferenceBeingHeld = false));
    this._isReferenceBeingHeld = true;

    // Ensure value is not leaked by the closure created by the "weak" callback.
    value = null;
  }

export const validateArrayTable = (table: any) => {
  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',
    );
  }
};

test('min option', () => {
  const fn = jest.fn(val => val);
  fn({key: 'value'});
  const expected =
    '[MockFunction] {"calls": [[{"key": "value"}]], "results": [{"type": "return", "value": {"key": "value"}}]}';
  expect(prettyFormat(fn, {min: true, plugins: [plugin]})).toBe(expected);
});

const _formatError = (
  errors?: Circus.Exception | [Circus.Exception | undefined, Circus.Exception],
): string => {
  let error;
  let asyncError;

  if (Array.isArray(errors)) {
    error = errors[0];
    asyncError = errors[1];
  } else {
    error = errors;
    asyncError = new Error();
  }

  if (error) {
    if (error.stack) {
      return error.stack;
    }
    if (error.message) {
      return error.message;
    }
  }

  asyncError.message = `thrown: ${prettyFormat(error, {maxDepth: 3})}`;

  return asyncError.stack;
};

export const serialize = (data: string): string =>
  addExtraLineBreaks(
    normalizeNewlines(
      prettyFormat(data, {
        escapeRegex: true,
        plugins: getSerializers(),
        printFunctionName: false,
      }),
    ),
  );

test('maxDepth option', () => {
  const fn1 = jest.fn();
  fn1.mockName('atDepth1');
  fn1('primitive', {key: 'value'});
  const fn2 = jest.fn();
  fn2.mockName('atDepth2');
  fn2('primitive', {key: 'value'});
  const fn3 = jest.fn();
  fn3.mockName('atDepth3');
  fn3('primitive', {key: 'value'});
  const val = {
    fn1,
    greaterThan1: {
      fn2,
      greaterThan2: {
        fn3,
      },
    },
  };
  const expected = [
    'Object {', // ++depth === 1
    '  "fn1": [MockFunction atDepth1] {',
    '    "calls": Array [', // ++depth === 2
    '      Array [', // ++depth === 3
    '        "primitive",',
    '        [Object],', // ++depth === 4
    '      ],',
    '    ],',
    '    "results": Array [', // ++depth === 2
    '      Object {', // ++depth === 3
    '        "type": "return",',
    '        "value": undefined,',
    '      },',
    '    ],',
    '  },',
    '  "greaterThan1": Object {', // ++depth === 2
    '    "fn2": [MockFunction atDepth2] {',
    '      "calls": Array [', // ++depth === 3
    '        [Array],', // ++depth === 4
    '      ],',
    '      "results": Array [', // ++depth === 3
    '        [Object],', // ++depth === 4
    '      ],',
    '    },',
    '    "greaterThan2": Object {', // ++depth === 3
    '      "fn3": [MockFunction atDepth3] {',
    '        "calls": [Array],', // ++depth === 4
    '        "results": [Array],', // ++depth === 4
    '      },',
    '    },',
    '  },',
    '}',
  ].join('\n');
  expect(prettyFormat(val, {maxDepth: 3, plugins: [plugin]})).toBe(expected);
});