From 01486c93e7209ff69dfc91573f72c94a44a7fbef Mon Sep 17 00:00:00 2001
From: Nitin Kumar <snitin315@gmail.com>
Date: Sun, 25 Oct 2020 11:06:17 +0530
Subject: [PATCH] fix(jest-jasmine2): handle case when stack is not string

---
 .../expectationResultFactory.test.ts.snap            |  6 ++++++
 .../src/__tests__/expectationResultFactory.test.ts   | 12 ++++++++++++
 packages/jest-jasmine2/src/reporter.ts               | 12 ++++++++----
 3 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/packages/jest-jasmine2/src/__tests__/__snapshots__/expectationResultFactory.test.ts.snap b/packages/jest-jasmine2/src/__tests__/__snapshots__/expectationResultFactory.test.ts.snap
index 73fd8445e1d2..f094459f5f43 100644
--- a/packages/jest-jasmine2/src/__tests__/__snapshots__/expectationResultFactory.test.ts.snap
+++ b/packages/jest-jasmine2/src/__tests__/__snapshots__/expectationResultFactory.test.ts.snap
@@ -1,5 +1,11 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`expectationResultFactory returns the result if failed (with \`error.stack\` not as a string). 1`] = `
+"thrown: Object {
+  \\"stack\\": Array [],
+}"
+`;
+
 exports[`expectationResultFactory returns the result if passed. 1`] = `
 Object {
   "error": undefined,
diff --git a/packages/jest-jasmine2/src/__tests__/expectationResultFactory.test.ts b/packages/jest-jasmine2/src/__tests__/expectationResultFactory.test.ts
index 59cebccb4cd9..7b00492e5edb 100644
--- a/packages/jest-jasmine2/src/__tests__/expectationResultFactory.test.ts
+++ b/packages/jest-jasmine2/src/__tests__/expectationResultFactory.test.ts
@@ -78,4 +78,16 @@ describe('expectationResultFactory', () => {
     const result = expectationResultFactory(options);
     expect(result.message).toEqual('Expected `Pass`, received `Fail`.');
   });
+
+  it('returns the result if failed (with `error.stack` not as a string).', () => {
+    const options = {
+      actual: 'Fail',
+      error: {stack: []},
+      expected: 'Pass',
+      matcherName: 'testMatcher',
+      passed: false,
+    };
+    const result = expectationResultFactory(options);
+    expect(result.message).toMatchSnapshot();
+  });
 });
diff --git a/packages/jest-jasmine2/src/reporter.ts b/packages/jest-jasmine2/src/reporter.ts
index 2bcb0ad79c35..9829f1db7805 100644
--- a/packages/jest-jasmine2/src/reporter.ts
+++ b/packages/jest-jasmine2/src/reporter.ts
@@ -113,15 +113,19 @@ export default class Jasmine2Reporter implements Reporter {
     return this._resultsPromise;
   }
 
-  private _addMissingMessageToStack(stack: string, message?: string) {
+  private _addMissingMessageToStack(stack: unknown, message?: string) {
     // Some errors (e.g. Angular injection error) don't prepend error.message
     // to stack, instead the first line of the stack is just plain 'Error'
     const ERROR_REGEX = /^Error:?\s*\n/;
 
-    if (stack && message && !stack.includes(message)) {
-      return message + stack.replace(ERROR_REGEX, '\n');
+    if (typeof stack === 'string') {
+      if (stack && message && !stack.includes(message)) {
+        return message + stack.replace(ERROR_REGEX, '\n');
+      }
+      return stack;
+    } else {
+      return `${stack}`;
     }
-    return stack;
   }
 
   private _extractSpecResults(