convert pdf to png using c# : Creating password protected pdf control software platform web page windows azure web browser diveintopython3-r80224-part584

class FromRomanBadInput(unittest.TestCase):
def test_too_many_repeated_numerals(self):
'''from_roman should fail with too many repeated numerals'''
for s in ('MMMM', 'DD', 'CCCC', 'LL', 'XXXX', 'VV', 'IIII'):
self.assertRaises(roman6.InvalidRomanNumeralError, roman6.from_roman, s)
Another useful test would be to check that certain patterns aren’t repeated. For example,
IX
is
9
,but
IXIX
is never valid.
def test_repeated_pairs(self):
'''from_roman should fail with repeated pairs of numerals'''
for s in ('CMCM', 'CDCD', 'XCXC', 'XLXL', 'IXIX', 'IVIV'):
self.assertRaises(roman6.InvalidRomanNumeralError, roman6.from_roman, s)
Athird test could check that numerals appear in thecorrect order, from highest to lowest value. For
example,
CL
is
150
,but
LC
is never valid, because the numeral for
50
can never come before the numeral for
100
.This test includes a randomly chosen set of invalid antecedents:
I
before
M
,
V
before
X
,and so on.
def test_malformed_antecedents(self):
'''from_roman should fail with malformed antecedents'''
for s in ('IIMXCC', 'VX', 'DCM', 'CMM', 'IXIV',
'MCMC', 'XCX', 'IVI', 'LM', 'LD', 'LC'):
self.assertRaises(roman6.InvalidRomanNumeralError, roman6.from_roman, s)
Each of these tests relies the
from_roman()
function raising a new exception,
InvalidRomanNumeralError
,
which wehaven’t defined yet.
# roman6.py
class InvalidRomanNumeralError(ValueError): pass
All three of these tests should fail, since the
from_roman()
function doesn’t currently have any validity
checking. (If they don’t fail now, then what the heckare they testing?)
241
Creating password protected pdf - C# PDF Password Library: add, remove, edit PDF file password in C#.net, ASP.NET, MVC, WinForms, WPF
Help to Improve the Security of Your PDF Document by Setting Password
adding a password to a pdf using reader; adding password to pdf file
Creating password protected pdf - VB.NET PDF Password Library: add, remove, edit PDF file password in vb.net, ASP.NET, MVC, WinForms, WPF
Help to Improve the Security of Your PDF Document by Setting Password
creating password protected pdf; convert password protected pdf to excel
you@localhost:~/diveintopython3/examples$ python3 romantest6.py
FFF.......
======================================================================
FAIL: test_malformed_antecedents (__main__.FromRomanBadInput)
from_roman should fail with malformed antecedents
----------------------------------------------------------------------
Traceback (most recent call last):
File "romantest6.py", line 113, in test_malformed_antecedents
self.assertRaises(roman6.InvalidRomanNumeralError, roman6.from_roman, s)
AssertionError: InvalidRomanNumeralError not raised by from_roman
======================================================================
FAIL: test_repeated_pairs (__main__.FromRomanBadInput)
from_roman should fail with repeated pairs of numerals
----------------------------------------------------------------------
Traceback (most recent call last):
File "romantest6.py", line 107, in test_repeated_pairs
self.assertRaises(roman6.InvalidRomanNumeralError, roman6.from_roman, s)
AssertionError: InvalidRomanNumeralError not raised by from_roman
======================================================================
FAIL: test_too_many_repeated_numerals (__main__.FromRomanBadInput)
from_roman should fail with too many repeated numerals
----------------------------------------------------------------------
Traceback (most recent call last):
File "romantest6.py", line 102, in test_too_many_repeated_numerals
self.assertRaises(roman6.InvalidRomanNumeralError, roman6.from_roman, s)
AssertionError: InvalidRomanNumeralError not raised by from_roman
----------------------------------------------------------------------
Ran 10 tests in 0.058s
FAILED (failures=3)
242
C# PDF: C#.NET PDF Document Merging & Splitting Control SDK
Can I use RasterEdge C#.NET PDF document merging & splitting toolkit SDK to split password-protected PDF document using Visual C# code?
copy protected pdf to word converter online; copy text from protected pdf to word
Online Convert PDF to HTML5 files. Best free online PDF html
Your HTML file is converted to look just the same as it does in your office software. Creating a HTML from PDF has never been so easy! Easy converting!
pdf password; add password to pdf
Good deal. Now, all we need to do is add the
regular expression to test for valid Roman numerals into the
from_roman()
function.
roman_numeral_pattern = re.compile('''
                  # beginning of string
M{0,3}              # thousands - 0 to 3 Ms
(CM|CD|D?C{0,3})    # hundreds - 900 (CM), 400 (CD), 0-300 (0 to 3 Cs),
           or 500-800 (D, followed by 0 to 3 Cs)
(XC|XL|L?X{0,3})    # tens - 90 (XC), 40 (XL), 0-30 (0 to 3 Xs),
       or 50-80 (L, followed by 0 to 3 Xs)
(IX|IV|V?I{0,3})    # ones - 9 (IX), 4 (IV), 0-3 (0 to 3 Is),
       or 5-8 (V, followed by 0 to 3 Is)
                  # end of string
''', re.VERBOSE)
def from_roman(s):
'''convert Roman numeral to integer'''
if not roman_numeral_pattern.search(s):
raise InvalidRomanNumeralError('Invalid Roman numeral: {0}'.format(s))
result = 0
index = 0
for numeral, integer in roman_numeral_map:
while s[index : index + len(numeral)] == numeral:
result += integer
index += len(numeral)
return result
And re-run thetests…
243
Online Convert PDF file to Word. Best free online PDF Conversion
Your word file is converted to look just the same as it does in your office software. Creating a Docx/Doc from PDF has never been so easy! Easy converting!
convert password protected pdf to word; pdf password online
Online Convert PDF file to Tiff. Best free online PDF Tif
Your Tiff file is converted to look just the same as it does in your office software. Creating a PDF from Tiff has never been so easy! Easy converting!
pdf password unlock; adding a password to a pdf file
you@localhost:~/diveintopython3/examples$ python3 romantest7.py
..........
----------------------------------------------------------------------
Ran 10 tests in 0.066s
OK
And the anticlimax award of theyear goes to… the word “
OK
”, which is printed by the
unittest
module
when all the tests pass.
244
Online Convert PDF file to Word. Best free online PDF Conversion
Your PDF file is converted to look just the same as it does in your office software. Creating a PDF from Tiff/Tif has never been so easy! Easy converting!
create password protected pdf online; break pdf password
Online Convert PowerPoint to PDF file. Best free online export
Your PDF file is converted to look just the same as it does in your office software. Creating a PDF from PPTX/PPT has never been so easy! Easy converting!
pdf password remover; pdf open password
C
HAPTER
10. R
EFACTORING
After one has played a vast quantity of notesand more notes, it issimplicity that emerges as the crowning reward
of art.
Frédéric Chopin
10.1. D
IVING
I
N
D
espite your best efforts to write comprehensive unit tests, bugs happen. What do I mean by “bug”? A
bug is atest case you haven’t written yet.
>>> import roman7
>>> roman7.from_roman('')
0
1. This is a bug. An empty string should raise an
InvalidRomanNumeralError
exception, just like any other
sequence of characters that don’t represent a valid Roman numeral.
After reproducing the bug, and before fixing it, you should write a test case that fails, thus illustrating the
bug.
class FromRomanBadInput(unittest.TestCase):
.
.
.
def testBlank(self):
'''from_roman should fail with blank string'''
self.assertRaises(roman6.InvalidRomanNumeralError, roman6.from_roman, '')
245
Online Convert Word to PDF file. Best free online export docx, doc
Your word file is converted to look just the same as it does in your office software. Creating a PDF from Doc has never been so easy! Easy converting!
crystal report to pdf with password; change password on pdf document
Online Convert Excel to PDF file. Best free online export xlsx
Your Excel file is converted to look just the same as it does in your office software. Creating a PDF from xlsx/xls has never been so easy! Easy converting!
create copy protected pdf; create pdf password
1. Pretty simple stuff here. Call
from_roman()
with an empty string and makesure it raises an
InvalidRomanNumeralError
exception. The hard part was findingthebug; now that you know about it, testing
for it is the easy part.
Since your codehas abug, and you now have atest case that tests this bug, thetest case will fail:
you@localhost:~/diveintopython3/examples$ python3 romantest8.py -v
from_roman should fail with blank string ... FAIL
from_roman should fail with malformed antecedents ... ok
from_roman should fail with repeated pairs of numerals ... ok
from_roman should fail with too many repeated numerals ... ok
from_roman should give known result with known input ... ok
to_roman should give known result with known input ... ok
from_roman(to_roman(n))==n for all n ... ok
to_roman should fail with negative input ... ok
to_roman should fail with non-integer input ... ok
to_roman should fail with large input ... ok
to_roman should fail with 0 input ... ok
======================================================================
FAIL: from_roman should fail with blank string
----------------------------------------------------------------------
Traceback (most recent call last):
File "romantest8.py", line 117, in test_blank
self.assertRaises(roman8.InvalidRomanNumeralError, roman8.from_roman, '')
AssertionError: InvalidRomanNumeralError not raised by from_roman
----------------------------------------------------------------------
Ran 11 tests in 0.171s
FAILED (failures=1)
Now you can fix thebug.
246
C# PDF: C# Code to Create Mobile PDF Viewer; C#.NET Mobile PDF
DocWidth = 819; protected void Page_Load(object sender, EventArgs e) { this.FileUrl = Server.MapPath("./Demo_Docs/").Replace("\\" Sample.pdf"; this
convert protected pdf to word; change password on pdf
C# TIFF: C#.NET Code to Create Online TIFF Document Viewer
string mode; public string fid; protected void Page_Load RasterEdge Image, PDF and Word Web Viewers. Besides NET, RasterEdge also supports creating image, PDF
protected pdf; pdf print protection
def from_roman(s):
'''convert Roman numeral to integer'''
if not s:
raise InvalidRomanNumeralError('Input can not be blank')
if not re.search(romanNumeralPattern, s):
raise InvalidRomanNumeralError('Invalid Roman numeral: {}'.format(s))
result = 0
index = 0
for numeral, integer in romanNumeralMap:
while s[index:index+len(numeral)] == numeral:
result += integer
index += len(numeral)
return result
1. Only twolines of code are required: an explicit check for an empty string, and a
raise
statement.
2. I don’t thinkI’ve mentioned this yet anywherein this book, so let this serveas your final lesson in
string
formatting. Starting in Python 3.1, you can skip the numbers when using positional indexes in a format
specifier. That is, instead of using the format specifier
{0}
torefer to the first parameter to the
format()
method, you can simply use
{}
and Python will fill in theproper positional index for you. This works for any
number of arguments;thefirst
{}
is
{0}
,the second
{}
is
{1}
,and so forth.
247
you@localhost:~/diveintopython3/examples$ python3 romantest8.py -v
from_roman should fail with blank string ... ok
from_roman should fail with malformed antecedents ... ok
from_roman should fail with repeated pairs of numerals ... ok
from_roman should fail with too many repeated numerals ... ok
from_roman should give known result with known input ... ok
to_roman should give known result with known input ... ok
from_roman(to_roman(n))==n for all n ... ok
to_roman should fail with negative input ... ok
to_roman should fail with non-integer input ... ok
to_roman should fail with large input ... ok
to_roman should fail with 0 input ... ok
----------------------------------------------------------------------
Ran 11 tests in 0.156s
OK
1. Theblankstring test case now passes, so the bug is fixed.
2. All the other test cases still pass, which means that this bug fix didn’t breakanything else. Stop coding.
Coding this way does not make fixing bugs any easier. Simple bugs (like this one) requiresimple test cases;
complex bugs will require complex test cases. In a testing-centric environment, it may seem likeit takes
longer tofix a bug, since you need to articulate in code exactly what the bug is (to writethetest case),
then fix the bug itself. Then if the test casedoesn’t pass right away, you need to figure out whether the fix
was wrong, or whether thetest case itself has a bug in it. However, in thelong run, this back-and-forth
between test code and code tested pays for itself, because it makes it more likely that bugs are fixed
correctly the first time. Also, since you can easily re-run all the test cases along with your new one, you are
much less likely to break old code when fixing new code. Today’s unit test is tomorrow’s regression test.
248
10.2. H
ANDLING
C
HANGING
R
EQUIREMENTS
Despiteyour best efforts to pin your customers to the ground and extract exact requirements from them
on pain of horriblenasty things involving scissors and hot wax, requirements will change. Most customers
don’t know what they want until they seeit, and even if they do, they aren’t that good at articulatingwhat
they want precisely enough to be useful. And even if they do, they’ll want more in thenext release anyway.
So be prepared to update your test cases as requirements change.
Suppose, for instance, that you wanted to expand the rangeof theRoman numeral conversion functions.
Normally, no character in a Roman numeral can be repeated more than three times in a row. But the
Romans were willingto make an exception to that ruleby having 4
M
characters in a row to represent
4000
.
If you makethis change, you’ll beable to expand therange of convertible numbers from
1..3999
to
1..4999
.
But first, you need to makesomechanges to your test cases.
249
class KnownValues(unittest.TestCase):
known_values = ( (1, 'I'),
.
.
.
(3999, 'MMMCMXCIX'),
(4000, 'MMMM'),
(4500, 'MMMMD'),
(4888, 'MMMMDCCCLXXXVIII'),
(4999, 'MMMMCMXCIX') )
class ToRomanBadInput(unittest.TestCase):
def test_too_large(self):
'''to_roman should fail with large input'''
self.assertRaises(roman8.OutOfRangeError, roman8.to_roman, 5000)
.
.
.
class FromRomanBadInput(unittest.TestCase):
def test_too_many_repeated_numerals(self):
'''from_roman should fail with too many repeated numerals'''
for s in ('MMMMM', 'DD', 'CCCC', 'LL', 'XXXX', 'VV', 'IIII'):
self.assertRaises(roman8.InvalidRomanNumeralError, roman8.from_roman, s)
.
.
.
class RoundtripCheck(unittest.TestCase):
def test_roundtrip(self):
'''from_roman(to_roman(n))==n for all n'''
for integer in range(1, 5000):
250
Documents you may be interested
Documents you may be interested