[Tests] add some basic nvm use --lts tests

nvm.sh

@@ -610,7 +610,7 @@ nvm_resolve_alias() {
   local SEEN_ALIASES
   SEEN_ALIASES="$ALIAS"
   while true; do
-    ALIAS_TEMP="$(nvm_alias "$ALIAS" 2> /dev/null)"
+    ALIAS_TEMP="$(nvm_alias "$ALIAS" 2> /dev/null || echo)"
 
     if [ -z "$ALIAS_TEMP" ]; then
       break

test/slow/nvm use/Running "nvm use --lts" uses latest LTS version

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -ex
+
+die () { echo $@ ; exit 1; }
+
+. ../../../nvm.sh
+
+nvm deactivate >/dev/null 2>&1 || die 'deactivate failed'
+
+nvm use --lts || die 'nvm use --lts failed'
+OUTPUT="$(nvm current)"
+EXPECTED_OUTPUT="$(nvm_resolve_alias 'lts/*')"
+
+[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
+  || die "'nvm use --lts' + 'nvm current' did not output '$EXPECTED_OUTPUT'; got '$OUTPUT'"
+
+OUTPUT="$(nvm use --silent --lts)"
+EXPECTED_OUTPUT=""
+
+[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
+  || die "'nvm use --silent --lts' output was not silenced '$EXPECTED_OUTPUT'; got '$OUTPUT'"

test/slow/nvm use/Running "nvm use --lts=foo" uses latest "foo" LTS version

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -ex
+
+die () { echo $@ ; exit 1; }
+
+. ../../../nvm.sh
+
+nvm deactivate 2>&1 >/dev/null || die 'deactivate failed'
+
+nvm use --lts=testing || die 'nvm use --lts=testing failed'
+OUTPUT="$(nvm current)"
+EXPECTED_OUTPUT="$(nvm_resolve_alias 'lts/testing')"
+
+[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
+  || die "'nvm use --lts=testing' + 'nvm current' did not output '$EXPECTED_OUTPUT'; got '$OUTPUT'"
+
+OUTPUT="$(nvm use --silent --lts=testing)"
+EXPECTED_OUTPUT=""
+
+[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
+  || die "'nvm use --silent --lts=testing' output was not silenced '$EXPECTED_OUTPUT'; got '$OUTPUT'"

test/slow/nvm use/setup_dir

@@ -6,6 +6,10 @@ mkdir -p "${NVM_DIR}/.nvm_use_bak"
 if [ -d "${NVM_DIR}/v*" ]; then
   mv "${NVM_DIR}/v*" "${NVM_DIR}/.nvm_use_bak/"
 fi
+mkdir -p "${NVM_DIR}/.nvm_use_lts_alias_bak"
+if [ -d "${NVM_DIR}/alias/lts" ]; then
+  mv "${NVM_DIR}/alias/lts/*" "${NVM_DIR}/.nvm_use_lts_alias_bak/"
+fi
 
 for VERSION in "0.8.7" "0.9.1" "0.10.1" "0.11.1"; do
   nvm install "v$VERSION"
@@ -14,3 +18,6 @@ done
 for VERSION in "1.0.0" "1.0.1"; do
   nvm install "iojs-v$VERSION"
 done
+
+nvm_make_alias lts/testing 0.10.1
+nvm_make_alias 'lts/*' lts/testing

test/slow/nvm use/teardown_dir

@@ -10,7 +10,13 @@ for VERSION in "1.0.0" "1.0.1"; do
   nvm uninstall "iojs-v$VERSION"
 done
 
-if [ -d ../../../.nvm_use_bak/* ]; then
+if [ -d "${NVM_DIR}/.nvm_use_bak/*" ]; then
-  mv ../../../.nvm_use_bak/* ../../../
+  mv "${NVM_DIR}/.nvm_use_bak/*" "${NVM_DIR}"
+  rmdir "${NVM_DIR}/.nvm_use_bak"
+fi
+
+if [ -d "${NVM_DIR}/.nvm_use_lts_alias_bak" ]; then
+  rm -rf "${NVM_DIR}/alias/lts/*"
+  mv "${NVM_DIR}/.nvm_use_lts_alias_bak/*" "${NVM_DIR}/alias/lts/"
+  rmdir "${NVM_DIR}/.nvm_use_lts_alias_bak"
 fi
-rmdir ../../../.nvm_use_bak