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[Solved] Jest.js error: “Received: serializes to the same string”

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error Jest.js error: “Received: serializes to the same string” in jestjs. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How To Solve Jest.js error: “Received: serializes to the same string” Error ?

  1. How To Solve Jest.js error: “Received: serializes to the same string” Error?

    To Solve Jest.js error: “Received: serializes to the same string” Error Just replaced the toBe method expect(function(array1)).toBe('one result') with toStrictEqual to make a deep equality comparison expect(function(array2)).toStrictEqual(['more than one', 'more than one']);

  2. Jest.js error: “Received: serializes to the same string”

    To Solve Jest.js error: “Received: serializes to the same string” Error Just replaced the toBe method expect(function(array1)).toBe('one result') with toStrictEqual to make a deep equality comparison expect(function(array2)).toStrictEqual(['more than one', 'more than one']);

  3. Received: serializes to the same string

    To solve Received: serializes to the same string Just replaced the toBe method expect(function(array1)).toBe('one result') with toStrictEqual to make a deep equality comparison expect(function(array2)).toStrictEqual(['more than one', 'more than one']);

Solution 1

I Just replaced the toBe method

expect(function(array1)).toBe('one result')

with toStrictEqual to make a deep equality comparison

expect(function(array2)).toStrictEqual(['more than one', 'more than one']);

Solution 2

Just had this problem when tried to compare arrays wherein one array there was an element with -1 index set (imagine any other key to be set except numbers from 0 to N). So you may have this error in the following scenario:

const arr = [1, 2]
arr[-1] = 'foo'
expect(arr).toEqual([1, 2])

Solution 3

I had a similar case where the object had a base64 encoded string, I managed the test to compare the serialization of the object using JSON.stringify:

expect(JSON.stringify(newDeal)).toMatchObject(JSON.stringify(expected));

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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