[#784] Document the existence of cider-test-infer-test-ns and make it a defcustom

Author: Bozhidar Batsov

README.md

@@ -356,6 +356,11 @@ helpful for identifying each host.
 Note that the history is written to the file when you kill the REPL
 buffer (which includes invoking `cider-quit`) or you quit Emacs.
 
+* If your tests are not following the `some.ns-test` naming convention you can
+customize the variable `cider-test-infer-test-ns`. It should be bound to a
+function that takes the current ns and returns the matching test ns (which may
+be the same as the current ns).
+
 ### Minibuffer completion
 
 Out-of-the box `CIDER` uses the standard `completing-read` Emacs mechanism. While it's not

cider-test.el

@@ -380,10 +380,13 @@ With the actual value, the outermost '(not ...)' s-expression is removed."
 ;; its corresponding test namespace. To provide this, we need to map the
 ;; relationship between those namespaces.
 
-(defvar cider-test-infer-test-ns 'cider-test-default-test-ns-fn
+(defcustom cider-test-infer-test-ns 'cider-test-default-test-ns-fn
   "Function to infer the test namespace for NS.
 The default implementation uses the simple Leiningen convention of appending
-'-test' to the namespace name.")
+'-test' to the namespace name."
+  :type 'symbol
+  :group 'cider-test
+  :package-version '(cider . "0.7.0"))
 
 (defun cider-test-default-test-ns-fn (ns)
   "For a NS, return the test namespace, which may be the argument itself.