---
title: "Testing"
description: "Mimics Methods From The Testing Standard Library"
weight: 15
domains:
  - "testing"
keywords:
  - "Fail"
  - "Failf"
  - "FailNow"
  - "FailNowf"
---

Mimics Methods From The Testing Standard Library

## Assertions

[![GoDoc][godoc-badge]][godoc-url]
{class="inline-badge"}

_All links point to <https://pkg.go.dev/github.com/go-openapi/testify/v2>_

This domain exposes 2 functionalities.

```tree
- [Fail](#fail) | angles-right
- [FailNow](#failnow) | angles-right
```

### Fail{#fail}
Fail reports a failure through.

{{% expand title="Examples" %}}
{{< tabs >}}
{{% tab title="Usage" %}}
```go
	assertions.Fail(t, "failed")
```
{{< /tab >}}
{{% tab title="Examples" %}}
```go
	failure: "failed"
```
{{< /tab >}}
{{< /tabs >}}
{{% /expand %}}

{{< tabs >}}
  
{{% tab title="assert" style="secondary" %}}
| Signature | Usage |
|--|--|
| [`assert.Fail(t T, failureMessage string, msgAndArgs ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#Fail) | package-level function |
| [`assert.Failf(t T, failureMessage string, msg string, args ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#Failf) | formatted variant |
| [`assert.(*Assertions).Fail(failureMessage string) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#Assertions.Fail) | method variant |
| [`assert.(*Assertions).Failf(failureMessage string, msg string, args ..any)`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#Assertions.Failf) | method formatted variant |
{{% /tab %}}
{{% tab title="require" style="secondary" %}}
| Signature | Usage |
|--|--|
| [`require.Fail(t T, failureMessage string, msgAndArgs ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#Fail) | package-level function |
| [`require.Failf(t T, failureMessage string, msg string, args ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#Failf) | formatted variant |
| [`require.(*Assertions).Fail(failureMessage string) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#Assertions.Fail) | method variant |
| [`require.(*Assertions).Failf(failureMessage string, msg string, args ..any)`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#Assertions.Failf) | method formatted variant |
{{% /tab %}}

{{% tab title="internal" style="accent" icon="wrench" %}}
| Signature | Usage |
|--|--|
| [`assertions.Fail(t T, failureMessage string, msgAndArgs ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/internal/assertions#Fail) | internal implementation |

**Source:** [github.com/go-openapi/testify/v2/internal/assertions#Fail](https://github.com/go-openapi/testify/blob/master/internal/assertions/testing.go#L23)
{{% /tab %}}
{{< /tabs >}}

### FailNow{#failnow}
FailNow fails test.

{{% expand title="Examples" %}}
{{< tabs >}}
{{% tab title="Usage" %}}
```go
	assertions.FailNow(t, "failed")
```
{{< /tab >}}
{{% tab title="Examples" %}}
```go
	failure: "failed"
```
{{< /tab >}}
{{< /tabs >}}
{{% /expand %}}

{{< tabs >}}
  
{{% tab title="assert" style="secondary" %}}
| Signature | Usage |
|--|--|
| [`assert.FailNow(t T, failureMessage string, msgAndArgs ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#FailNow) | package-level function |
| [`assert.FailNowf(t T, failureMessage string, msg string, args ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#FailNowf) | formatted variant |
| [`assert.(*Assertions).FailNow(failureMessage string) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#Assertions.FailNow) | method variant |
| [`assert.(*Assertions).FailNowf(failureMessage string, msg string, args ..any)`](https://pkg.go.dev/github.com/go-openapi/testify/v2/assert#Assertions.FailNowf) | method formatted variant |
{{% /tab %}}
{{% tab title="require" style="secondary" %}}
| Signature | Usage |
|--|--|
| [`require.FailNow(t T, failureMessage string, msgAndArgs ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#FailNow) | package-level function |
| [`require.FailNowf(t T, failureMessage string, msg string, args ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#FailNowf) | formatted variant |
| [`require.(*Assertions).FailNow(failureMessage string) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#Assertions.FailNow) | method variant |
| [`require.(*Assertions).FailNowf(failureMessage string, msg string, args ..any)`](https://pkg.go.dev/github.com/go-openapi/testify/v2/require#Assertions.FailNowf) | method formatted variant |
{{% /tab %}}

{{% tab title="internal" style="accent" icon="wrench" %}}
| Signature | Usage |
|--|--|
| [`assertions.FailNow(t T, failureMessage string, msgAndArgs ...any) bool`](https://pkg.go.dev/github.com/go-openapi/testify/v2/internal/assertions#FailNow) | internal implementation |

**Source:** [github.com/go-openapi/testify/v2/internal/assertions#FailNow](https://github.com/go-openapi/testify/blob/master/internal/assertions/testing.go#L45)
{{% /tab %}}
{{< /tabs >}}

---

---

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[godoc-badge]: https://pkg.go.dev/badge/github.com/go-openapi/testify/v2
[godoc-url]: https://pkg.go.dev/github.com/go-openapi/testify/v2

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