Latest #property-testing Threads 
I’m trying to test an Ecto query that joins a few tables, and that a lot of where conditions that have to satisfy before selecting rows. ...
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Suppose I have a legacy rails or node-js or java project.
I will write a separate new project for tests. I will check all the tests pass...
New
Trying to write a property based test to prove ‘js_lib.patch(json_a, elixir_lib.diff(json_a, json_b)) == json_b’
a , b are maps and I n...
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In episode 72 of Thinking Elixir, we talk with Wiebe-Marten Wijnja about his project TypeCheck that provides a new kind of runtime type c...
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I receive this error
== Compilation error in file path/campaign_test.exs ==
** (exit) exited in: GenServer.call(PropCheck.CounterStrike,...
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TypeCheck: Fast and flexible runtime type-checking for your Elixir projects.
Core ideas
Type- and function specifications are const...
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Greetings! I am relatively new to property-based testing. I am practicing writing property tests and hoping for a code review if any prac...
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If you are interested in Using Property Based Testing in Elixir I have a new training course on the subject. It will be about 10 lessons ...
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I’m trying to write property based tests for a Reverse Polish Notation calculator.
I’ve implemented the RPN such that it will return an ...
New
From the example in the documentation, I can’t figure out how it could work.
Please check the following. I get error
** (ArgumentError)...
New
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TypeCheck: Fast and flexible runtime type-checking for your Elixir projects.
Core ideas
Type- and function specifications are const...
New
I’m trying to test an Ecto query that joins a few tables, and that a lot of where conditions that have to satisfy before selecting rows. ...
New
Trending Over Three Years
Hi folks,
I'm trying to transform our tests for AuthToken (a wrapper around JOSE) to ExUnitProperties. But I'm kinda failing at the mos...
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I was trying to use StreamData with test factory functions based off of what is in “What’s new in Ecto 2.1” book (or also close to what t...
New
I’m trying to write property based tests for a Reverse Polish Notation calculator.
I’ve implemented the RPN such that it will return an ...
New
I am having a hard time coming up with negative tests. I believe it can be done with filters, but I haven’t been able to come up good wor...
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ElixirConf US 2018 – Picking Properties to Test in Property-Based Testing – Michael Stalker (@mstalker)
The developer st...
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There is long running issue on stream_data library to implement such functionality. In the meanwhile I have created this small library (s...
New
I am trying to generate strings which pass a rule, e.g.
1 < length(string) < 10
So I am using,
StreamData.string( … ) |> Stre...
New
I receive this error
== Compilation error in file path/campaign_test.exs ==
** (exit) exited in: GenServer.call(PropCheck.CounterStrike,...
New
If you are interested in Using Property Based Testing in Elixir I have a new training course on the subject. It will be about 10 lessons ...
New
Hi everyone!
I’m Nikola and I’ll be working on the following google summer of code project.
I plan on updating you folks in this thread...
New
ElixirConf US 2018 – Empirical Monkeys: A Practitioner’s Take on Breaking Distributed Elixir Systems via Property-Based Testing – Rafal S...
New
I am generating a list of atoms which looks like this,
[:c, :u, :d]
|> StreamData.one_of()
|> StreamData.list_of()
…
A little mo...
New
Greetings! I am relatively new to property-based testing. I am practicing writing property tests and hoping for a code review if any prac...
New
There’s a nice map function for StreamData,
https://hexdocs.pm/stream_data/StreamData.html#map/2
but how do people do reduction? I.e. s...
New
From the example in the documentation, I can’t figure out how it could work.
Please check the following. I get error
** (ArgumentError)...
New
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