In unittest/unittest.h, ASSERT_TRUE has ASSERT as an alias for readability.

In a similar vein, some tests would benefit (in terms of readability) from having an ASSERT_NOT macro, which is an alias for ASSERT_FALSE.

For example, I think this:

ASSERT_NOT(::mongo::serverGlobalParams.cwd.empty());

is more readable (ie. more clearly expresses the concept that "cwd is not empty") than either of the alternatives:

// Slightly brain bending
ASSERT_FALSE(::mongo::serverGlobalParams.cwd.empty());

// The ! is easily missed (visually)
ASSERT(!::mongo::serverGlobalParams.cwd.empty());