41 lines
990 B
Crystal
41 lines
990 B
Crystal
require "../../../spec_helper"
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module Ameba::Rule::Lint
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describe RandZero do
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subject = RandZero.new
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it "passes if it is not rand(1) or rand(0)" do
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expect_no_issues subject, <<-CRYSTAL
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rand(1.0)
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rand(0.11)
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rand(2)
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CRYSTAL
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end
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it "fails if it is rand(0)" do
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expect_issue subject, <<-CRYSTAL
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rand(0)
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# ^^^^^ error: rand(0) always returns 0
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CRYSTAL
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end
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it "fails if it is rand(1)" do
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expect_issue subject, <<-CRYSTAL
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rand(1)
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# ^^^^^ error: rand(1) always returns 0
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CRYSTAL
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end
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it "reports rule, location and a message" do
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s = Source.new "rand(1)", "source.cr"
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subject.catch(s).should_not be_valid
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issue = s.issues.first
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issue.rule.should_not be_nil
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issue.location.to_s.should eq "source.cr:1:1"
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issue.end_location.to_s.should eq "source.cr:1:7"
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issue.message.should eq "rand(1) always returns 0"
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end
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end
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end
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