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Originally, this test created a 100000-row test table, which made it run rather slowly compared to other contrib tests. Investigation with gcov showed that we got no further improvement in code coverage after the first 700 or so rows, making the large table 99% a waste of time. Cut it back to 2000 rows to fix the runtime problem and still leave some headroom for testing behaviors that may appear later. A closer look at the gcov results showed that the main coverage omissions in contrib/bloom occurred because the test never filled more than one entry in the notFullPage array; which is unsurprising because it exercised index cleanup only in the scenario of complete table deletion, allowing every page in the index to become deleted rather than not-full. Add testing that allows the not-full path to be exercised as well. Also, test the amvalidate function, because blvalidate.c had zero coverage without that, and besides it's a good idea to check for mistakes in the bloom opclass definitions.
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.