How to unit test writing a file to AWS Lambda output stream?

» java » How to unit test writing a file to AWS Lambda output stream?

By : philuX

Date : January 11 2021, 03:34 PM

With these it helps Instead of mocking the OutputStream, you can create a ByteArrayOutputStream. It's basically just an array of bytes that implements OutputStream. And then you can verify the correct content was written with ByteArrayOutputSteam#toBytes(), or ByteArrayOutputStream#toString()

code :

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Writing a single unit test composed of multiple test cases violates unit testing principles?

By : Jeya Kumar

Date : March 29 2020, 07:55 AM

I wish this help you One test case = one condition to be tested, some people translates condition to assert, that's wrong, a condition can be composed of one or more asserts
Example: Imagine that you are developing a chess game, and you have just implemented the movement functionality and you want to test it, check the following test case.

code :

public void testPawnCanMoveTwoSquaresAheadFromInitialRow (){
    [...]
    //Test moving first a white pawn
    assertPawnCanMoveTwoSquaersAheadFromInitialRow ("a2", "a4");
    //Test moving fater a black pawn
    assertPawnCanMoveTwoSquaersAheadFromInitialRow ("h7", "h5");
}

private void assertPawnCanMoveTwoSquaersAheadFromInitialRow (String from, String to){
    [...]
    Piece movingPiece = board.getSquareContent(from);
    assertTrue (movingPiece.isPawn ());
    assertTrue (board.move (from, to));
    assertTrue (board.getSquareContent(from).isEmpty());
    assertTrue (board.getSquareContent(to).isPawn());
    [...]
}

c# Unit Test: Writing to Settings in unit test does not save values in user.config

By : Kim Dave Martinito

Date : March 29 2020, 07:55 AM

This might help you I tried it with Visual Studio 2010 on Windows 7 and the Visual Studio Unit Test framework is actually creating a temporary folder for test applications in which I found my user.config file with correct settings. I think it might be the same thing on VS 2008. The path scheme to these folder is of the kind:
Windows 10 path:

Writing a unit test for Python logger formatted output

By : Александр Зиновьев

Date : March 29 2020, 07:55 AM

I wish this help you From the documentation (http://packages.python.org/testfixtures/logging.html):

code :

>>> import logging
>>> from testfixtures import LogCapture
>>> with LogCapture() as l:
...     logger = logging.getLogger()
...     logger.info('a message')
...     logger.error('an error')

>>> l.check(
...     ('root', 'INFO', 'a message'),
...     ('root', 'ERROR', 'another error'),
...     )
Traceback (most recent call last):
 ...
AssertionError: Sequence not as expected:

same:
(('root', 'INFO', 'a message'),)

first:
(('root', 'ERROR', 'another error'),)

second:
(('root', 'ERROR', 'an error'),)

from testfixtures import log_capture

@log_capture()
def test_function(l):
    logger = logging.getLogger()
    logger.info('a message')
    logger.error('an error')

    l.check(
        ('root', 'INFO', 'a message'),
        ('root', 'ERROR', 'an error'),
        )

>>> from testfixtures import LogCapture
>>> l = LogCapture()

>>> l.check(('root', 'INFO', 'a message'))
<...>

Test in Prolog. How to run a unit test that checks if my output file matches the my text file?

By : Saumyata Singh

Date : March 29 2020, 07:55 AM

will be helpful for those in need read/1 might be what you are looking for:
Suppose I define a fact p/1:

code :

p([a,b,c]).

?- read(X), p(X).
|: [a,b,c].

X = [a, b, c].

?- read(X), p(X).
|: [].

false.

Need help on writing a junit test for a function which is returning Flux stream as output

By : user2965679

Date : March 29 2020, 07:55 AM

Does that help Stream.generate(Supplier) generates an infinite Stream, so completeScans is infinite too.
Since interval is also infinite, with the mock service the zipping of the two results in a Flux that emits ["Scan1:Success"] every 5 second.