Add test for environment variable expansion

test/tests/clean-environment-variable-expansion.bash

@@ -0,0 +1,16 @@
+test_description='clean expands environment variables'
+. '../test-lib.bash'
+
+test_expect_success 'setup' '
+ln -s ${DOTFILES}/f ~/.f
+'
+
+test_expect_success 'run' '
+run_dotbot <<EOF
+- clean: ["\$HOME"]
+EOF
+'
+
+test_expect_success 'test' '
+! test -h ~/.f
+'