Build: Add /shared path to unit test runner

Tests in /shared were not being run by the test runner. Some makefiles
also needed tweaking.

The /shared folder will be removed soon but the tests should be run
in the meantime.

bin/run-all-tests

@@ -84,4 +84,4 @@ __cleanup() {
 trap __cleanup SIGINT SIGTERM
 
 # Run all tests
-find {$BASEDIR/../client,$BASEDIR/../server} -name Makefile | run_test_fast
+find {$BASEDIR/../client,$BASEDIR/../server,$BASEDIR/../shared} -name Makefile | run_test_fast

shared/lib/formatting/Makefile

@@ -1,8 +1,11 @@
 REPORTER ?= spec
-MOCHA ?= ../../../node_modules/.bin/mocha
+NODE_BIN := $(shell npm bin)
+MOCHA ?= $(NODE_BIN)/mocha
+BASE_DIR := $(NODE_BIN)/../..
+NODE_PATH := test:$(BASE_DIR)/client:$(BASE_DIR)/shared
 
 # In order to simply stub modules, add test to the NODE_PATH
 test:
-	@NODE_ENV=test NODE_PATH=test:../../../client $(MOCHA) --compilers js:babel/register --reporter $(REPORTER)
+	@NODE_ENV=test NODE_PATH=$(NODE_PATH) $(MOCHA) --compilers js:babel/register --reporter $(REPORTER)
 
 .PHONY: test