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34 lines
972 B
Crystal
34 lines
972 B
Crystal
require "../../../spec_helper"
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module Ameba::Rule::Performance
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subject = FlattenAfterMap.new
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describe FlattenAfterMap do
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it "passes if there is no potential performance improvements" do
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expect_no_issues subject, <<-CRYSTAL
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%w[Alice Bob].flat_map(&.chars)
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CRYSTAL
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end
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it "reports if there is map followed by flatten call" do
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expect_issue subject, <<-CRYSTAL
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%w[Alice Bob].map(&.chars).flatten
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# ^^^^^^^^^^^^^^^^^^^^ error: Use `flat_map {...}` instead of `map {...}.flatten`
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CRYSTAL
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end
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it "does not report is 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(&.chars).flatten
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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(&.chars).flatten }}
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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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