Function printExpectedReceivedCallsPositive

packages/expect/src/spyMatchers.ts:139–217

(
  expected: Array<unknown>,
  indexedCalls: Array<IndexedCall>,
  expand: boolean,
  isOnlyCall: boolean,
  iExpectedCall?: number,
)

};

const printExpectedReceivedCallsPositive = (
  expected: Array<unknown>,
  indexedCalls: Array<IndexedCall>,
  expand: boolean,
  isOnlyCall: boolean,
  iExpectedCall?: number,
) => {
  const expectedLine = `Expected: ${printExpectedArgs(expected)}\n`;
  if (indexedCalls.length === 0) {
    return expectedLine;
  }

  const label = 'Received: ';
  if (isOnlyCall && (iExpectedCall === 0 || iExpectedCall === undefined)) {
    const received = indexedCalls[0][1];

    if (isLineDiffableCall(expected, received)) {
      // Display diff without indentation.
      const lines = [
        EXPECTED_COLOR('- Expected'),
        RECEIVED_COLOR('+ Received'),
        '',
      ];

      const length = Math.max(expected.length, received.length);
      for (let i = 0; i < length; i += 1) {
        if (i < expected.length && i < received.length) {
          if (isEqualValue(expected[i], received[i])) {
            lines.push(`  ${printCommon(received[i])},`);
            continue;
          }

          if (isLineDiffableArg(expected[i], received[i])) {
            const difference = diff(expected[i], received[i], {expand});
            if (
              typeof difference === 'string' &&
              difference.includes('- Expected') &&
              difference.includes('+ Received')
            ) {
              // Omit annotation in case multiple args have diff.
              lines.push(`${difference.split('\n').slice(3).join('\n')},`);
              continue;
            }
          }
        }

        if (i < expected.length) {
          lines.push(`${EXPECTED_COLOR(`- ${stringify(expected[i])}`)},`);
        }
        if (i < received.length) {
          lines.push(`${RECEIVED_COLOR(`+ ${stringify(received[i])}`)},`);
        }
      }

      return `${lines.join('\n')}\n`;
    }

    return `${expectedLine + label + printReceivedArgs(received, expected)}\n`;