require_relative "../test_helper" require "lox/environment" require "lox/error" require "lox/token" class TestEnvironment < Lox::Test NAME_TOKEN = Lox::Token.new(:IDENTIFIER, "name", "name", 0) def setup @env = Lox::Environment.new end def test_define @env.define("name", "value") assert_equal "value", @env.get(NAME_TOKEN) end def test_get assert_raises Lox::RuntimeError, "Undefined variable name 'name'." do @env.get(NAME_TOKEN) end end def test_enclosing_define @env.define("name", "value") enclosed = Lox::Environment.new(@env) assert_equal "value", enclosed.get(NAME_TOKEN) enclosed.define("name", "foo") assert_equal "foo", enclosed.get(NAME_TOKEN) end def test_enclosing_assign @env.define("name", "foo") enclosed = Lox::Environment.new(@env) enclosed.assign(NAME_TOKEN, "bar") assert_equal "bar", enclosed.get(NAME_TOKEN) assert_equal "bar", @env.get(NAME_TOKEN) enclosed.define("name", "baz") enclosed.assign(NAME_TOKEN, "qux") assert_equal "qux", enclosed.get(NAME_TOKEN) assert_equal "bar", @env.get(NAME_TOKEN) end def test_get_at @env.define("name", "foo") enclosed = Lox::Environment.new(@env) enclosed.define("name", "bar") assert_equal "foo", enclosed.get_at(1, "name") assert_equal "bar", enclosed.get_at(0, "name") assert_equal "foo", @env.get_at(0, "name") end end