Bug #80018 [Opn]: Tests expect var_dump(FLOAT) to print an integer

[email protected]
Newsgroups php.bugs,php.qa
Message-ID <[email protected]>
Edit report at https://bugs.php.net/bug.php?id=80018&edit=1

 ID:                 80018
 Updated by:         [email protected]
 Reported by:        jamieliu at google dot com
 Summary:            Tests expect var_dump(FLOAT) to print an integer
 Status:             Open
 Type:               Bug
 Package:            Testing related
 Operating System:   All
 PHP Version:        master-Git-2020-08-25 (Git)
 Block user comment: N
 Private report:     N

 New Comment:

I agree that this should be fixed, but to my knowledge
run-tests.php does not support %E, but only %f.  Are you using
another test runner?


Previous Comments:
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[2020-08-25 20:09:25] jamieliu at google dot com

Description:
------------
Many tests parse the result of var_dump() on a float and expect the result to be an integer:

$ find . -name '*.phpt' | xargs grep 'float(%d)'
./Zend/tests/cast_to_double.phpt:float(%d)
./Zend/tests/settype_double.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk.phpt:float(%d)
./ext/standard/tests/file/disk.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_error.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_error.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_error.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_free_space_basic.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/file/disk_total_space_variation.phpt:float(%d)
./ext/standard/tests/general_functions/type.phpt:float(%d)
./ext/standard/tests/general_functions/type.phpt:float(%d)
./ext/standard/tests/general_functions/type.phpt:float(%d)
./ext/standard/tests/general_functions/gettype_settype_basic.phpt:float(%d)
./ext/standard/tests/general_functions/gettype_settype_basic.phpt:float(%d)
./ext/standard/tests/general_functions/gettype_settype_basic.phpt:float(%d)
./ext/standard/tests/general_functions/gettype_settype_basic.phpt:float(%d)

This is problematic because var_dump() will print sufficiently large numbers in exponential notation. An example in Linux:

$ mkdir tmp
$ sudo mount -t tmpfs -o size=$((1 << 62)) tmpfs tmp
$ ~/src/php-src/sapi/cli/php --version
PHP 8.0.0-dev (cli) (built: Aug 25 2020 12:55:38) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.0-dev, Copyright (c) Zend Technologies
$ ~/src/php-src/sapi/cli/php -r 'var_dump(disk_total_space("tmp"));'
float(4.611686018427388E+18)

I think every instance of "float(%d)" in such tests could simply be converted to use "float(%E)" instead.

Test script:
---------------
See description.



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Edit this bug report at https://bugs.php.net/bug.php?id=80018&edit=1
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