shard-ameba/spec/ameba/rule/metrics/cyclomatic_complexity_spec.cr

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require "../../../spec_helper"
module Ameba::Rule::Metrics
subject = CyclomaticComplexity.new
complex_method = <<-CODE
def hello(a, b, c)
if a && b && c
begin
while true
return if false && b
end
""
rescue
""
end
end
end
CODE
describe CyclomaticComplexity do
it "passes for empty methods" do
source = Source.new %(
def hello
end
)
subject.catch(source).should be_valid
end
it "reports one issue for a complex method" do
subject.max_complexity = 5
source = Source.new(complex_method, "source.cr")
subject.catch(source).should_not be_valid
issue = source.issues.first
issue.rule.should eq subject
issue.location.to_s.should eq "source.cr:1:1"
issue.end_location.to_s.should eq "source.cr:12:3"
issue.message.should eq "Cyclomatic complexity too high [8/5]"
end
it "doesn't report an issue for an increased threshold" do
subject.max_complexity = 100
source = Source.new(complex_method, "source.cr")
subject.catch(source).should be_valid
end
end
end