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# Test.fnl
**Table of contents**
- [`deftest`](#deftest)
- [`testing`](#testing)
- [`assert-eq`](#assert-eq)
- [`assert-ne`](#assert-ne)
- [`assert-is`](#assert-is)
- [`assert-not`](#assert-not)
## `deftest`
Function signature:
```
(deftest name ...)
```
Simple way of grouping tests.
## `testing`
Function signature:
```
(testing description ...)
```
Print test description and run it.
## `assert-eq`
Function signature:
```
(assert-eq expr1 expr2 msg)
```
Like `assert`, except compares results of two expressions on equality.
Generates formatted message if `msg` is not set to other message.
### Example
Compare two expressions:
``` fennel
>> (assert-eq 1 (+1 1))
runtime error: equality assertion failed
Left: 1
Right: 3
```
Deep compare values:
``` fennel
>> (assert-eq [1 {[2 3] [4 5 6]}] [1 {[2 3] [4 5]}])
runtime error: equality assertion failed
Left: [1 {
[2 3] [4 5 6]
}]
Right: [1 {
[2 3] [4 5]
}]
```
## `assert-ne`
Function signature:
```
(assert-ne expr1 expr2 msg)
```
Assert for unequality. Same as [`assert-eq`](#assert-eq).
## `assert-is`
Function signature:
```
(assert-is expr msg)
```
Assert for truth. Same as inbuilt `assert`, except generates more
verbose message if `msg` is not set.
``` fennel
>> (assert-is (= 1 2 3))
runtime error: assertion failed for (= 1 2 3)
```
## `assert-not`
Function signature:
```
(assert-not expr msg)
```
Assert for not truth. Works the same as [`assert-is`](#assert-is).
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