Add test nvm_install_with_node_version under test/install_script
diff --git a/test/install_script/nvm_install_with_node_version b/test/install_script/nvm_install_with_node_version
new file mode 100755
index 0000000..e88ab2b
--- /dev/null
+++ b/test/install_script/nvm_install_with_node_version
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+die () { echo "$@" ; exit 1; }
+
+NODE_VERSION=8 \. ../../install.sh
+
+# nvm installed node 8
+(nvm ls | grep 8) > /dev/null 2>&1 || die "nvm didn't install node 8"