Adding nvm_print_implicit_alias error tests.

test/fast/Unit tests/nvm_print_implicit_alias errors

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+die () { echo $@ ; exit 1; }
+
+. ../../../nvm.sh
+
+EXPECTED_FIRST_MSG="nvm_print_implicit_alias must be specified with local or remote as the first argument."
+[ "_$(nvm_print_implicit_alias 2>&1)" = "_$EXPECTED_FIRST_MSG" ] \
+  || die "nvm_print_implicit_alias did not require local|remote as first argument"
+[ "_$(nvm_print_implicit_alias foo 2>&1)" = "_$EXPECTED_FIRST_MSG" ] \
+  || die "nvm_print_implicit_alias did not require local|remote as first argument"
+
+FIRST_EXIT_CODE="$(nvm_print_implicit_alias > /dev/null 2>&1 ; echo $?)"
+[ "_$FIRST_EXIT_CODE" = "_1" ] \
+  || die "nvm_print_implicit_alias without local|remote had wrong exit code: expected 1, got $FIRST_EXIT_CODE"
+
+EXPECTED_SECOND_MSG="Only implicit aliases 'stable' and 'unstable' are supported."
+[ "_$(nvm_print_implicit_alias local 2>&1)" = "_$EXPECTED_SECOND_MSG" ] \
+  || die "nvm_print_implicit_alias did not require stable|unstable as second argument"
+[ "_$(nvm_print_implicit_alias local foo 2>&1)" = "_$EXPECTED_SECOND_MSG" ] \
+  || die "nvm_print_implicit_alias did not require stable|unstable as second argument"
+
+SECOND_EXIT_CODE="$(nvm_print_implicit_alias local > /dev/null 2>&1 ; echo $?)"
+[ "_$SECOND_EXIT_CODE" = "_2" ] \
+  || die "nvm_print_implicit_alias without stable|unstable had wrong exit code: expected 2, got $SECOND_EXIT_CODE"
+