Some tests are not semantic, and differ from the conventions set by the others

The tests for binary, trinary, wordy, accumulate, and bst differ from the rest a few ways.
  
-what is in "expect" and "toBe" is backwards from the test title. This makes it hard to debug. 
-the require at the top of the test was asking for "example" while the others had a semantic file name.  

It is not clear if I should make these changes in x-api as well, please let me know and I will be happy to.

thank you, 

Joe Shidel