Add tests for rbenv PATH and RBENV_HOOK_PATH handling

test/libexec/rbenv-echo

@@ -1,2 +1,9 @@
 #!/usr/bin/env bash
-eval "echo \$$1"
+# Usage: rbenv echo [-F<char>] VAR
+
+if [[ $1 == -F* ]]; then
+  sep="${1:2}"
+  echo "${!2}" | tr "${sep:-:}" $'\n'
+else
+  echo "${!1}"
+fi

test/rbenv.bats

@@ -45,3 +45,26 @@ load test_helper
   assert_failure
   assert_output "rbenv: cannot change working directory to \`$dir'"
 }
+
+@test "adds its own libexec to PATH" {
+  run rbenv echo "PATH"
+  assert_success "${BATS_TEST_DIRNAME%/*}/libexec:$PATH"
+}
+
+@test "adds plugin bin dirs to PATH" {
+  mkdir -p "$RBENV_ROOT"/plugins/ruby-build/bin
+  mkdir -p "$RBENV_ROOT"/plugins/rbenv-each/bin
+  run rbenv echo -F: "PATH"
+  assert_success
+  assert_line 0 "${BATS_TEST_DIRNAME%/*}/libexec"
+  assert_line 1 "${RBENV_ROOT}/plugins/ruby-build/bin"
+  assert_line 2 "${RBENV_ROOT}/plugins/rbenv-each/bin"
+}
+
+@test "RBENV_HOOK_PATH preserves value from environment" {
+  RBENV_HOOK_PATH=/my/hook/path:/other/hooks run rbenv echo -F: "RBENV_HOOK_PATH"
+  assert_success
+  assert_line 0 "/my/hook/path"
+  assert_line 1 "/other/hooks"
+  assert_line 2 "${RBENV_ROOT}/rbenv.d"
+}