adding some tests for nvm which

test/fast/Listing paths/Running "nvm which 0.0.2" should display only version 0.0.2.

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+mkdir ../../../v0.0.2
+mkdir ../../../v0.0.20
+
+. ../../../nvm.sh
+
+die () { echo $@ ; exit 1; }
+
+# The result should contain only the appropriate version numbers.
+
+nvm which 0.0.2 | grep "$NVM_DIR/v0.0.2/bin" > /dev/null
+if [ $? -ne 0 ]; then
+  die '"nvm which 0.0.2" did not contain the correct path'
+fi
+
+nvm which 0.0.20 | grep "$NVM_DIR/v0.0.20/bin" > /dev/null
+if [ $? -ne 0 ]; then
+  die '"nvm which 0.0.2" did not contain the correct path'
+fi

test/fast/Listing paths/teardown

@@ -0,0 +1,17 @@
+rmdir ../../../v0.0.1 >/dev/null 2>&1
+rmdir ../../../v0.0.2 >/dev/null 2>&1
+rmdir ../../../v0.0.3 >/dev/null 2>&1
+rmdir ../../../v0.0.9 >/dev/null 2>&1
+rmdir ../../../v0.0.20 >/dev/null 2>&1
+rmdir ../../../v0.1.2 >/dev/null 2>&1
+rmdir ../../../v0.1.3 >/dev/null 2>&1
+rmdir ../../../v0.2.3 >/dev/null 2>&1
+rmdir ../../../v0.3.1 >/dev/null 2>&1
+rmdir ../../../v0.3.3 >/dev/null 2>&1
+rmdir ../../../v0.3.9 >/dev/null 2>&1
+rmdir ../../../v0.20.3 >/dev/null 2>&1
+rmdir ../../../versions >/dev/null 2>&1
+unalias nvm_has_system_node >/dev/null 2>&1
+rm -f ../../../alias/stable >/dev/null 2>&1
+rm -f ../../../alias/unstable >/dev/null 2>&1
+