graphql-query-test-mock/lib/handleErrors.js

Mock queries to your GraphQL backend in your Jest tests.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.printNoMockFoundError = printNoMockFoundError;
exports.printVariablesDoesNotMatchError = printVariablesDoesNotMatchError;

var _jestDiff = _interopRequireDefault(require("jest-diff"));

var _index = require("./index");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function printNoMockFoundError(queryMock, operationName, variables) {
  const errorMessageArray = getNoMockFoundErrorMessageArray(queryMock, operationName, variables);
  throw new Error(errorMessageArray.join(''));
}

function getNoMockFoundErrorMessageArray(queryMock, operationName, variables) {
  const mockedQueriesMessageArray = [`Could not find matching mock for operation "${operationName}" ` + `with variables: ${JSON.stringify(variables)}\n` + `Make sure you have mocked the query you are making.\n\n`];

  if (!Object.entries(queryMock._queries).length) {
    mockedQueriesMessageArray.push(`=== No query was mocked ===\n\n`);
    return mockedQueriesMessageArray;
  }

  if (queryMock._queries[operationName]) {
    mockedQueriesMessageArray.push(`=== Currently mocked "${operationName}" queries ===\n`);

    queryMock._queries[operationName].forEach(({
      queryMockConfig
    }) => {
      mockedQueriesMessageArray.push(`Query "variables": ${JSON.stringify(queryMockConfig.variables) || '-'}\n` + `Diff of "variables":\n` + `${(0, _jestDiff.default)(queryMockConfig.variables, variables)}\n\n`);
    });
  }

  const otherMockedQueryNames = Object.keys(queryMock._queries).filter(queryMockName => operationName !== queryMockName);

  if (!otherMockedQueryNames.length) {
    return mockedQueriesMessageArray;
  }

  mockedQueriesMessageArray.push(`=== ${queryMock._queries[operationName] ? 'Other' : 'All'} mocked queries ===\n`);
  otherMockedQueryNames.forEach(queryName => {
    mockedQueriesMessageArray.push(`- "${queryName || 'unknown'}"\n`);
  });
  mockedQueriesMessageArray.push(`\n`);
  return mockedQueriesMessageArray;
}

function printVariablesDoesNotMatchError(queryMockConfig, shouldMatchOnVariables, operationName, variables) {
  if (shouldMatchOnVariables) {
    let errorStr = `Variables do not match for operation "${operationName || 'unknown'}"`;

    if (queryMockConfig.matchVariables) {
      throw new Error(`${errorStr} due to custom "matchOnVariables" function`);
    } else {
      throw new Error(`${errorStr}.\n\nVariables in request VS mocked variables: \n${(0, _jestDiff.default)(variables, queryMockConfig.variables)}`);
    }
  }
}