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