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110 lines
2 KiB
Crystal
110 lines
2 KiB
Crystal
require "../../spec_helper"
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module Ameba
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subject = Rule::EmptyExpression.new
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def it_detects_empty_expression(code)
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it "detects empty expression" do
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s = Source.new code
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rule = Rule::EmptyExpression.new
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rule.catch(s).should_not be_valid
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end
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end
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describe Rule::EmptyExpression do
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it "passes if there is no empty expression" do
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s = Source.new %(
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def method()
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end
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method()
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method(1, 2, 3)
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method(nil)
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a = nil
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a = ""
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a = 0
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nil
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:any.nil?
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begin "" end
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[nil] << nil
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)
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subject.catch(s).should be_valid
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end
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it_detects_empty_expression %(())
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it_detects_empty_expression %(((())))
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it_detects_empty_expression %(a = ())
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it_detects_empty_expression %((();()))
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it_detects_empty_expression %(if (); end)
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it_detects_empty_expression %(
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if foo
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1
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elsif ()
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2
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end
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)
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it_detects_empty_expression %(
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case foo
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when :foo then ()
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end
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)
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it_detects_empty_expression %(
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case foo
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when :foo then 1
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else
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()
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end
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)
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it_detects_empty_expression %(
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case foo
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when () then 1
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end
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)
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it_detects_empty_expression %(
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def method
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a = 1
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()
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end
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)
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it_detects_empty_expression %(
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def method
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rescue
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()
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end
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)
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it_detects_empty_expression %(
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def method
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begin
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end
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end
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)
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it_detects_empty_expression %(
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begin; end
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)
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it_detects_empty_expression %(
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begin
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nil
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end
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)
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it_detects_empty_expression %(
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begin
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()
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end
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)
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it "reports rule, location and message" do
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s = Source.new %(
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if ()
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end
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), "source.cr"
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subject.catch(s).should_not be_valid
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error = s.errors.first
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error.rule.should_not be_nil
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error.location.to_s.should eq "source.cr:2:12"
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error.message.should eq "Avoid empty expressions"
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end
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end
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end
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