The upcoming version of TeamCity 3.1 will contain a possibility to search tests with a particular name in build results.
It allows to find out if a particular test has been run in the build. If you have a project with several thousand tests, using a filter is much more convenient than loading the full test list.
Right now, you can see ordinal number of the test, its status, and duration (with possibility to view a graph of the test duration history). All this is described in the corresponding part of the TeamCity UI documentation.
In the future, we plan to add a possibility to view the output of a particular test right from this interface (watch/vote for TW-3553).