Fix.

node_modules/@jest/test-result/build/formatTestResults.js

@@ -0,0 +1,104 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = formatTestResults;
+
+function _objectSpread(target) {
+  for (var i = 1; i < arguments.length; i++) {
+    var source = arguments[i] != null ? arguments[i] : {};
+    var ownKeys = Object.keys(source);
+    if (typeof Object.getOwnPropertySymbols === 'function') {
+      ownKeys = ownKeys.concat(
+        Object.getOwnPropertySymbols(source).filter(function(sym) {
+          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
+        })
+      );
+    }
+    ownKeys.forEach(function(key) {
+      _defineProperty(target, key, source[key]);
+    });
+  }
+  return target;
+}
+
+function _defineProperty(obj, key, value) {
+  if (key in obj) {
+    Object.defineProperty(obj, key, {
+      value: value,
+      enumerable: true,
+      configurable: true,
+      writable: true
+    });
+  } else {
+    obj[key] = value;
+  }
+  return obj;
+}
+
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+const formatTestResult = (testResult, codeCoverageFormatter, reporter) => {
+  const assertionResults = testResult.testResults.map(formatTestAssertion);
+
+  if (testResult.testExecError) {
+    const now = Date.now();
+    return {
+      assertionResults,
+      coverage: {},
+      endTime: now,
+      message: testResult.failureMessage
+        ? testResult.failureMessage
+        : testResult.testExecError.message,
+      name: testResult.testFilePath,
+      startTime: now,
+      status: 'failed',
+      summary: ''
+    };
+  } else {
+    const allTestsPassed = testResult.numFailingTests === 0;
+    return {
+      assertionResults,
+      coverage: codeCoverageFormatter
+        ? codeCoverageFormatter(testResult.coverage, reporter)
+        : testResult.coverage,
+      endTime: testResult.perfStats.end,
+      message: testResult.failureMessage || '',
+      name: testResult.testFilePath,
+      startTime: testResult.perfStats.start,
+      status: allTestsPassed ? 'passed' : 'failed',
+      summary: ''
+    };
+  }
+};
+
+function formatTestAssertion(assertion) {
+  const result = {
+    ancestorTitles: assertion.ancestorTitles,
+    failureMessages: null,
+    fullName: assertion.fullName,
+    location: assertion.location,
+    status: assertion.status,
+    title: assertion.title
+  };
+
+  if (assertion.failureMessages) {
+    result.failureMessages = assertion.failureMessages;
+  }
+
+  return result;
+}
+
+function formatTestResults(results, codeCoverageFormatter, reporter) {
+  const testResults = results.testResults.map(testResult =>
+    formatTestResult(testResult, codeCoverageFormatter, reporter)
+  );
+  return _objectSpread({}, results, {
+    testResults
+  });
+}