---
permalink: /helpers/ExpectHelper
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title: ExpectHelper
---

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## ExpectHelper

This helper allows performing assertions based on Chai.

### Examples

Zero-configuration when paired with other helpers like REST, Playwright:

```js
// inside codecept.conf.js
{
  helpers: {
    Playwright: {...},
    ExpectHelper: {},
  }
}
```

## Methods

### expectAbove

#### Parameters

- `targetData` **any**&#x20;
- `aboveThan` **any**&#x20;
- `customErrorMsg` **any?**

### expectBelow

#### Parameters

- `targetData` **any**&#x20;
- `belowThan` **any**&#x20;
- `customErrorMsg` **any?**

### expectContain

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValueToContain` **any**&#x20;
- `customErrorMsg` **any?**

### expectDeepEqual

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValue` **any**&#x20;
- `customErrorMsg` **any?**

### expectDeepEqualExcluding

expects members of two JSON objects are deeply equal excluding some properties

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValue` **any**&#x20;
- `fieldsToExclude` **any**&#x20;
- `customErrorMsg` **any?**

### expectDeepIncludeMembers

expects an array to be a superset of another array

#### Parameters

- `superset` **any**&#x20;
- `set` **any**&#x20;
- `customErrorMsg` **any?**

### expectDeepMembers

expects members of two arrays are deeply equal

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValue` **any**&#x20;
- `customErrorMsg` **any?**

### expectEmpty

#### Parameters

- `targetData` **any**&#x20;
- `customErrorMsg` **any?**

### expectEndsWith

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValueToEndWith` **any**&#x20;
- `customErrorMsg` **any?**

### expectEqual

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValue` **any**&#x20;
- `customErrorMsg` **any?**

### expectEqualIgnoreCase

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValue` **any**&#x20;
- `customErrorMsg` **any?**

### expectFalse

#### Parameters

- `targetData` **any**&#x20;
- `customErrorMsg` **any?**

### expectHasAProperty

#### Parameters

- `targetData` **any**&#x20;
- `propertyName` **any**&#x20;
- `customErrorMsg` **any?**

### expectHasProperty

#### Parameters

- `targetData` **any**&#x20;
- `propertyName` **any**&#x20;
- `customErrorMsg` **any?**

### expectJsonSchema

#### Parameters

- `targetData` **any**&#x20;
- `jsonSchema` **any**&#x20;
- `customErrorMsg` **any?**

### expectJsonSchemaUsingAJV

#### Parameters

- `targetData` **any**&#x20;
- `jsonSchema` **any**&#x20;
- `customErrorMsg` **any?**
- `ajvOptions` **any?** Pass AJV options

### expectLengthAboveThan

#### Parameters

- `targetData` **any**&#x20;
- `lengthAboveThan` **any**&#x20;
- `customErrorMsg` **any?**

### expectLengthBelowThan

#### Parameters

- `targetData` **any**&#x20;
- `lengthBelowThan` **any**&#x20;
- `customErrorMsg` **any?**

### expectLengthOf

#### Parameters

- `targetData` **any**&#x20;
- `length` **any**&#x20;
- `customErrorMsg` **any?**

### expectMatchesPattern

expects a JSON object matches a provided pattern

#### Parameters

- `actualValue` **any**&#x20;
- `expectedPattern` **any**&#x20;
- `customErrorMsg` **any?**

### expectMatchRegex

#### Parameters

- `targetData` **any**&#x20;
- `regex` **any**&#x20;
- `customErrorMsg` **any?**

### expectNotContain

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValueToNotContain` **any**&#x20;
- `customErrorMsg` **any?**

### expectNotDeepEqual

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValue` **any**&#x20;
- `customErrorMsg` **any?**

### expectNotEndsWith

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValueToNotEndWith` **any**&#x20;
- `customErrorMsg` **any?**

### expectNotEqual

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValue` **any**&#x20;
- `customErrorMsg` **any?**

### expectNotStartsWith

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValueToNotStartWith` **any**&#x20;
- `customErrorMsg` **any?**

### expectStartsWith

#### Parameters

- `actualValue` **any**&#x20;
- `expectedValueToStartWith` **any**&#x20;
- `customErrorMsg` **any?**

### expectToBeA

#### Parameters

- `targetData` **any**&#x20;
- `type` **any**&#x20;
- `customErrorMsg` **any?**

### expectToBeAn

#### Parameters

- `targetData` **any**&#x20;
- `type` **any**&#x20;
- `customErrorMsg` **any?**

### expectTrue

#### Parameters

- `targetData` **any**&#x20;
- `customErrorMsg` **any?**