<s>
Factory	B-Language
Bot	I-Language
,	O
originally	O
known	O
as	O
Factory	B-Language
Girl	I-Language
,	O
is	O
a	O
software	O
library	O
for	O
the	O
Ruby	B-Language
programming	I-Language
language	I-Language
that	O
provides	O
factory	B-Language
methods	I-Language
to	O
create	O
test	O
fixtures	O
for	O
automated	O
software	O
testing	O
.	O
</s>
<s>
The	O
fixture	O
objects	O
can	O
be	O
created	O
on	O
the	O
fly	O
;	O
they	O
may	O
be	O
plain	O
Ruby	B-Language
objects	O
with	O
a	O
predefined	O
state	O
,	O
ORM	B-General_Concept
objects	O
with	O
existing	O
database	O
records	O
or	O
mock	O
objects	O
.	O
</s>
<s>
Factory	B-Language
Bot	I-Language
is	O
often	O
used	O
in	O
testing	O
Ruby	B-Application
on	I-Application
Rails	I-Application
applications	O
;	O
where	O
it	O
replaces	O
Rails	O
 '	O
built-in	O
fixture	O
mechanism	O
.	O
</s>
<s>
Factory	B-Language
Bot	I-Language
,	O
on	O
the	O
other	O
hand	O
,	O
allows	O
developers	O
to	O
define	O
a	O
different	O
setup	O
for	O
each	O
test	O
and	O
thus	O
helps	O
to	O
avoid	O
dependencies	O
within	O
the	O
test	O
suite	O
.	O
</s>
<s>
Factory	B-Language
Bot	I-Language
allows	O
creating	O
aliases	O
for	O
existing	O
factories	O
so	O
that	O
the	O
factories	O
can	O
be	O
reused	O
.	O
</s>
<s>
Factory	B-Language
Bot	I-Language
allows	O
creating	O
unique	O
values	O
for	O
a	O
test	O
attribute	O
in	O
a	O
given	O
format	O
.	O
</s>
<s>
Factory	B-Language
Bot	I-Language
allows	O
custom	O
code	O
to	O
be	O
injected	O
at	O
four	O
different	O
stages	O
:	O
</s>
