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<< Click to Display Table of Contents >> RayQC > 7.3 u2 > User Guide > Plug-ins > Internal Plug-ins > Logic Plug-in Regular Expressions |
Regular expressions (abbreviated to RexEx or RegExp) are sequences of characters forming a search pattern that can be used to identify a textual material of a given pattern. The syntax of regular expression is standardized and used along many different products and operating systems, particularly for find and replace functionalities.
RayQC uses regular expressions to provide a flexible way of defining compact text matching conditions, which can used to determine whether or not a specific test result is tolerable.
The following cheat sheet presents some commonly used regular expression patterns and example patterns with explanation.
Phrase |
Description |
Examples |
|---|---|---|
Letters or digits |
Literal meaning, case sensitive |
Abc matching Abc but not abc |
Pipe (|) |
Alternative |
A|b matching A, b, Ab but not BC |
Asterisk (*) |
Zero or more instances of the previous set |
A*b matching Aaaaab, Ab, bcd but not Ac A|b* matching a, b, bb, bbb but not CDE |
Plus (+) |
One or more instances of the previous set |
A+b matching Ab, AAAb but not b (a|b)+cd matching acd, bcd, aaacd, abcd, bacd but not cd Folder[0-9]+ matching Folder1, Folder2, Folder21 but not Folder or FolderA |
Question mark (?) |
Zero or one instance of the previous set |
Ab?(c|d) matching Ac, Ade, Abcd but not Abb |
Round brackets ( and ) |
Grouping of sets |
(abc|def)ghi matching abcghi, defghi, abcdefghi but not abcdef (a|b|c)?def matching adef, cdefghi, def but not abc |
Caret (^) |
On the beginning of the string marks that no characters are allowed before |
^abc matching abc, abcdef but not defabc ^(folder1|folder2|folder3)\\test matching folder1\test, folder2\test\test2 but not C:\folder1\test |
Dollar ($) |
At the end of the string marks that no characters are allowed after |
:\\test\\folder$ matching C:\test\folder, D:\test\folder but not C:\test\folder1 |
Square brackets [ and ] |
Allowed set of characters |
[a-z] matching abc, def but not 123 ^[A-D]:\\Test\\ matching C:\Test\ and D:\Test\ but not E:\Test\ folder[a-zA-Z0-9] matching folderA, folder1 but not folder\test |
Caret in square brackets [^] |
In square brackets – negation of character set |
C:\\folder[^\\]*\\test will match C:\folder\test but not C:\folder\subfolder\test |
Dot (.) |
Any character |
Folder.\\test will match FolderA\, Folder4\, Folder$\ but not Folder\ |
Backslash (\) |
Escape character |
C:\\test\\test2 matches C:\test\test2 but not C:\\test\\test2 Test\* matches Test* Test\(a\) matches Test(a) but not Testa |
(?i) |
Used at the beginning on the expression – do not match case |
(?i)abc will match abc, Abc, ABC123 but not 123 |
^(?i)(%windir%)\\Installer$
Matches |
Does not match |
|---|---|
%windir%\Installer %windir%\INSTALLER |
%windir%\Installer\123-123.msi |
^(?i)%ProgramFiles\(x86\)%\\Common Files\\(InstallShield|Wise Installation)$
Matches |
Does not match |
|---|---|
%ProgramFiles(x86)%\Common Files %ProgramFiles(x86)%\COMMON FILES |
%ProgramFiles(x86)%\Common Files\Microsoft %ProgramFiles%\Common Files\InstallShield %ProgramFiles(x86)%\Common Files\ %ProgramFiles(x86)%\Common Files\ |
^unins(|t|tall).*\.(cif|cfg|dat|dll|ini|exe|xml|lnk)$
Matches |
Does not match |
|---|---|
uninst.exe uninst_myApp.lnk uninstallapp.cfg uninst.ini |
MyProgram_uninstall.cfg uninstall.txt unins.txt |
^_isreg32\.dll$
Matches |
Does not match |
|---|---|
_isreg32.dll |
_ISREG32.dll isreg32.dll _isreg.dll _isreg32.dll.backup |
^(?i)(HKEY_LOCAL_MACHINE|HKEY_CURRENT_USER)\\(Software\\Wow6432Node|Software)
\\InstallShield
Matches |
Does not match |
|---|---|
HKEY_LOCAL_MACHINE\Software\InstallShield HKEY_LOCAL_MACHINE\Software\Wow6432Node HKEY_CURRENT_USER\SOFTWARE\Wow6432Node HKEY_CURRENT_USER\Software\INSTALLSHIELD |
HKEY_CLASSES_ROOT\Software\InstallShield HKEY_CURRENT_USER\Software |
^%USERPROFILE%\\(.+\\)?Temp$
Matches |
Does not match |
|---|---|
%USERPROFILE%\Temp %USERPROFILE%\test\Temp %USERPROFILE%\test\test2\Temp |
%USERPROFILE%\Temp2 “%USERPROFILE%\Temp” %userprofile%\Temp |