const ensureMock = (mockOrSpy: any, matcherName: any) => {
  if (
    !mockOrSpy ||
    ((mockOrSpy.calls === undefined || mockOrSpy.calls.all === undefined) &&
      mockOrSpy._isMockFunction !== true)
  ) {
    throw new Error(
      matcherErrorMessage(
        matcherHint('[.not]' + matcherName, 'jest.fn()', ''),
        `${RECEIVED_COLOR('received')} value must be a mock or spy function`,
        printWithType('Received', mockOrSpy, printReceived),
      ),
    );
  }
};

 report = () =>
   `New snapshot was ${RECEIVED_COLOR('not written')}. The update flag ` +
   `must be explicitly passed to write a new snapshot.\n\n` +
   `This is likely because this test is run in a continuous integration ` +
   `(CI) environment in which snapshots are not written by default.\n\n` +
   `${RECEIVED_COLOR('Received value')} ` +
   `${actual}`;

 report = () =>
   `${RECEIVED_COLOR('Received value')} does not match ` +
   `${EXPECTED_COLOR(`stored snapshot "${result.key}"`)}.\n\n` +
   (diffMessage ||
     EXPECTED_COLOR('- ' + (expected || '')) +
       '\n' +
       RECEIVED_COLOR('+ ' + actual));

const extractExpectedAssertionsErrors = () => {
  const result = [];
  const {
    assertionCalls,
    expectedAssertionsNumber,
    expectedAssertionsNumberError,
    isExpectingAssertions,
    isExpectingAssertionsError,
  } = getState();

  resetAssertionsLocalState();

  if (
    typeof expectedAssertionsNumber === 'number' &&
    assertionCalls !== expectedAssertionsNumber
  ) {
    const numOfAssertionsExpected = EXPECTED_COLOR(
      pluralize('assertion', expectedAssertionsNumber),
    );

    expectedAssertionsNumberError.message =
      matcherHint('.assertions', '', String(expectedAssertionsNumber), {
        isDirectExpectCall: true,
      }) +
      '\n\n' +
      `Expected ${numOfAssertionsExpected} to be called but received ` +
      RECEIVED_COLOR(pluralize('assertion call', assertionCalls || 0)) +
      '.';

    result.push({
      actual: assertionCalls,
      error: expectedAssertionsNumberError,
      expected: expectedAssertionsNumber,
    });
  }
  if (isExpectingAssertions && assertionCalls === 0) {
    const expected = EXPECTED_COLOR('at least one assertion');
    const received = RECEIVED_COLOR('received none');

    isExpectingAssertionsError.message =
      matcherHint('.hasAssertions', '', '', {
        isDirectExpectCall: true,
      }) +
      '\n\n' +
      `Expected ${expected} to be called but ${received}.`;

    result.push({
      actual: 'none',
      error: isExpectingAssertionsError,
      expected: 'at least one',
    });
  }

  return result;
};

 : () =>
     matcherHint(matcherName, receivedName) +
     '\n\n' +
     `Expected ${identifier} to have last returned:\n` +
     `  ${printExpected(expected)}\n` +
     (!lastResult
       ? `But it was ${RECEIVED_COLOR('not called')}`
       : lastResult.type === 'incomplete'
       ? `But the last call ${RECEIVED_COLOR('has not returned yet')}`
       : lastResult.type === 'throw'
       ? `But the last call ${RECEIVED_COLOR('threw an error')}`
       : `But the last call returned:\n  ${printReceived(
           lastResult.value,
         )}`);

 : () => {
     const diffString =
       valuePassed && hasEndProp
         ? diff(value, result.value, {expand: this.expand})
         : '';
     return (
       matcherHint('.toHaveProperty', 'object', 'path', {
         secondArgument,
       } as MatcherHintOptions) +
       '\n\n' +
       `Expected the object:\n` +
       `  ${printReceived(object)}\n` +
       `To have a nested property:\n` +
       `  ${printExpected(keyPath)}\n` +
       (valuePassed
         ? `With a value of:\n  ${printExpected(value)}\n`
         : '') +
       (hasEndProp
         ? `Received:\n` +
           `  ${printReceived(result.value)}` +
           (diffString ? `\n\nDifference:\n\n${diffString}` : '')
         : traversedPath
         ? `Received:\n  ${RECEIVED_COLOR(
             'object',
           )}.${traversedPath}: ${printReceived(lastTraversedObject)}`
         : '')
     );
   };

  function(this: MatcherState, received: Function, expected: any) {
    const options = {
      isNot: this.isNot,
      promise: this.promise,
    };

    let thrown = null;

    if (fromPromise && isError(received)) {
      thrown = getThrown(received);
    } else {
      if (typeof received !== 'function') {
        if (!fromPromise) {
          const placeholder = expected === undefined ? '' : 'expected';
          throw new Error(
            matcherErrorMessage(
              matcherHint(matcherName, undefined, placeholder, options),
              `${RECEIVED_COLOR('received')} value must be a function`,
              printWithType('Received', received, printReceived),
            ),
          );
        }
      } else {
        try {
          received();
        } catch (e) {
          thrown = getThrown(e);
        }
      }
    }

    if (expected === undefined) {
      return toThrow(matcherName, options, thrown);
    } else if (typeof expected === 'function') {
      return toThrowExpectedClass(matcherName, options, thrown, expected);
    } else if (typeof expected === 'string') {
      return toThrowExpectedString(matcherName, options, thrown, expected);
    } else if (expected !== null && typeof expected.test === 'function') {
      return toThrowExpectedRegExp(matcherName, options, thrown, expected);
    } else if (
      expected !== null &&
      typeof expected.asymmetricMatch === 'function'
    ) {
      return toThrowExpectedAsymmetric(matcherName, options, thrown, expected);
    } else if (expected !== null && typeof expected === 'object') {
      return toThrowExpectedObject(matcherName, options, thrown, expected);
    } else {
      throw new Error(
        matcherErrorMessage(
          matcherHint(matcherName, undefined, undefined, options),
          `${EXPECTED_COLOR(
            'expected',
          )} value must be a string or regular expression or class or error`,
          printWithType('Expected', expected, printExpected),
        ),
      );
    }
  };

export const printReceivedStringContainExpectedSubstring = (
  received: string,
  start: number,
  length: number, // not end
): string =>
  RECEIVED_COLOR(
    '"' +
      printSubstring(received.slice(0, start)) +
      INVERTED_COLOR(printSubstring(received.slice(start, start + length))) +
      printSubstring(received.slice(start + length)) +
      '"',
  );