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How to properly assert that an exception gets raised in pytest?
How to make pytest print traceback, so I would see where in the whatever function an exception was raised?
11 Answers
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Define a lambda expression that raises an Exception
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It is quite hacky but for writing tests where you want to mock functions this works neat !!!
– Kannan Ekanath
May 3 '13 at 10:14
9
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Preferred method to store PHP arrays (json_encode vs serialize)
...ance is your absolute driving characteristic, then by all means use the fastest one. Just make sure you have a full understanding of the differences before you make a choice
Unlike serialize() you need to add extra parameter to keep UTF-8 characters untouched: json_encode($array, JSON_UNESCAPED_U...
Is there a short contains function for lists?
...le list comprehension.
list_does_contain = next((True for item in list_to_test if item == test_item), False)
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How does Facebook disable the browser's integrated Developer Tools?
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I'm a security engineer at Facebook and this is my fault. We're testing this for some users to see if it can slow down some attacks where users are tricked into pasting (malicious) JavaScript code into the browser console.
Just to be clear: trying to block hackers client-side is a bad id...
How do I partially update an object in MongoDB so the new object will overlay / merge with the exist
...operties of those objects.
Given the object you specified above:
> db.test.insert({"id": "test_object", "some_key": {"param1": "val1", "param2": "val2", "param3": "val3"}})
WriteResult({ "nInserted" : 1 })
We can update just some_key.param2 and some_key.param3:
> db.test.findAndModify({
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How do I analyze a program's core dump file with GDB when it has command-line parameters?
... -s core can be used to dump memory in bulk
Now for the full educational test setup:
main.c
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int myfunc(int i) {
*(int*)(NULL) = i; /* line 7 */
return i - 1;
}
int main(int argc, char...
Debugging Package Manager Console Update-Database Seed Method
... the Seed method.
You may take this one step further and construct a unit test (or, more precisely, an integration test) that creates an empty test database, applies all EF migrations, runs the Seed method, and drops the test database again:
var configuration = new DbMigrationsConfiguration<TCo...
Determine project root from a running node.js application
... That means that you can determine whether a file has been run directly by testing require.main === module
Because module provides a filename property (normally equivalent to __filename), the entry point of the current application can be obtained by checking require.main.filename.
So if you w...
What is __pycache__?
... hidden bytecode files.
On Windows the equivalent command might be (not tested, batch script welcome):
dir * /s/b | findstr __pycache__ | attrib +h +s +r
Which is same as going through the project hiding folders using right-click > hide...
Running unit tests is one scenario (more in comm...