shard-ameba/spec/ameba/rule/lint/rand_zero_spec.cr
2022-04-04 21:14:45 +02:00

40 lines
990 B
Crystal

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