shard-ameba/spec/ameba/ast/flow_expression_spec.cr
2021-11-10 09:16:14 +02:00

72 lines
2.1 KiB
Crystal

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 eq 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 %(
def foobar
return
a = 1
a = 2
end
)
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 %(
def run
idx = items.size - 1
while 0 <= idx
return
end
puts "foo"
end
)
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 %(
def foobar
a = 1
return a
end
)
node = nodes.expressions_nodes.first
flow_expression = FlowExpression.new node, false
flow_expression.unreachable_nodes.empty?.should eq true
end
end
end
end
end