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45 lines
1.5 KiB
Crystal
45 lines
1.5 KiB
Crystal
require "../../../spec_helper"
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module Ameba::Rule::Performance
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subject = MinMaxAfterMap.new
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describe MinMaxAfterMap do
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it "passes if there are no potential performance improvements" do
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expect_no_issues subject, <<-CRYSTAL
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%w[Alice Bob].map { |name| name.size }.min(2)
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%w[Alice Bob].map { |name| name.size }.max(2)
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CRYSTAL
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end
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it "reports if there is a `min/max/minmax` call followed by `map`" do
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source = expect_issue subject, <<-CRYSTAL
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%w[Alice Bob].map { |name| name.size }.min
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# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: Use `min_of {...}` instead of `map {...}.min`.
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%w[Alice Bob].map(&.size).max.zero?
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# ^^^^^^^^^^^^^^^ error: Use `max_of {...}` instead of `map {...}.max`.
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%w[Alice Bob].map(&.size).minmax?
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# ^^^^^^^^^^^^^^^^^^^ error: Use `minmax_of? {...}` instead of `map {...}.minmax?`.
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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%w[Alice Bob].min_of { |name| name.size }
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%w[Alice Bob].max_of(&.size).zero?
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%w[Alice Bob].minmax_of?(&.size)
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CRYSTAL
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end
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it "does not report if source is a spec" do
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expect_no_issues subject, path: "source_spec.cr", code: <<-CRYSTAL
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%w[Alice Bob].map(&.size).min
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CRYSTAL
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end
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context "macro" do
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it "doesn't report in macro scope" do
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expect_no_issues subject, <<-CRYSTAL
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{{ %w[Alice Bob].map(&.size).min }}
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CRYSTAL
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end
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end
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end
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end
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