https://github.com/jw3126/whynotequal.jl

Find out why complex structs are not equal
https://github.com/jw3126/whynotequal.jl

debug julia

Last synced: about 1 year ago
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Find out why complex structs are not equal

• Host: GitHub
• URL: https://github.com/jw3126/whynotequal.jl
• Owner: jw3126
• License: mit
• Created: 2022-12-03T21:56:08.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2024-07-23T07:39:54.000Z (almost 2 years ago)
• Last Synced: 2025-03-22T11:06:13.028Z (over 1 year ago)
• Topics: debug, julia
• Language: Julia
• Homepage:
• Size: 125 KB
• Stars: 24
• Watchers: 3
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# WhyNotEqual

[![Build Status](https://github.com/jw3126/WhyNotEqual.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/jw3126/WhyNotEqual.jl/actions/workflows/CI.yml?query=branch%3Amain)

[![Coverage](https://codecov.io/gh/jw3126/WhyNotEqual.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/jw3126/WhyNotEqual.jl)

Quickly find out why two complicated objects are not equal.

# Usage

Ever encountered a situation like this:

```julia

@test expected == result

Test Failed at /home/jan/.julia/dev/WhyNotEqual/doit.jl:21

  Expression: expected == result

   Evaluated: (v = (hello = :world, language = :julia), w = 42, x = [1, 2, 3, 4, 5], y = AB(1, 2), 

z = Dict{AB, Any}(AB(2, 3) => AB(3, ()), AB(1, 2) => 3), zz = (foo = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10

  …  91, 92, 93, 94, 95, 96, 97, 98, 99, 100], bar = :bar)) == (v = (hello = :world, language = :ju

lia), w = 42, x = [1, 2, 3, 4, 5], y = AB(1, 2), z = Dict{AB, Any}(AB(2, 3) => AB(4, ()), AB(1, 2) 

=> 3), zz = (foo = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10  …  91, 92, 93, 94, 95, 96, 97, 98, 99, 100], bar

 = :bar))

ERROR: LoadError: There was an error during testing

```

Can you spot the difference? This package can do it for you:

```julia

using WhyNotEqual

whynot(==, expected, result)

```

```

DifferentAndNoChildren: When applying `lens` to both objects, we get `obj1` and `obj2`.

obj1 and obj2 are different, but they don't have any children.

lens: (@optic _.z[AB(2, 3)].a)

obj1: 3

obj2: 4

```

Of course you also have programmatic access to this data

```julia

lens = whynot(==, expected, result).lens

@show lens

@show lens(expected)

@show lens(result)

```

```

lens = (@optic _.z[AB(2, 3)].a)

lens(expected) = 3

lens(result) = 4

4

```