require "../../spec_helper" module Ameba::AST describe FlowExpression do describe "#initialize" do it "creates a new flow expression" do node = as_node("return 22") flow_expression = FlowExpression.new node, false flow_expression.node.should_not be_nil flow_expression.in_loop?.should be_false end describe "#delegation" do it "delegates to_s to @node" do node = as_node("return 22") flow_expression = FlowExpression.new node, false flow_expression.to_s.should eq node.to_s end it "delegates locations to @node" do node = as_node("break if true") flow_expression = FlowExpression.new node, false flow_expression.location.should eq node.location flow_expression.end_location.should eq node.end_location end end describe "#unreachable_nodes" do it "returns unreachable nodes" do nodes = as_nodes <<-CRYSTAL def foobar return a = 1 a = 2 end CRYSTAL node = nodes.expressions_nodes.first flow_expression = FlowExpression.new node, false flow_expression.unreachable_nodes.should eq nodes.assign_nodes end it "returns nil if there is no unreachable node after loop" do nodes = as_nodes <<-CRYSTAL def run idx = items.size - 1 while 0 <= idx return end puts "foo" end CRYSTAL node = nodes.expressions_nodes.first flow_expression = FlowExpression.new node, false flow_expression.unreachable_nodes.empty?.should eq true end it "returns nil if there is no unreachable node" do nodes = as_nodes <<-CRYSTAL def foobar a = 1 return a end CRYSTAL node = nodes.expressions_nodes.first flow_expression = FlowExpression.new node, false flow_expression.unreachable_nodes.empty?.should eq true end end end end end