Use issue expectation helpers in Performance::FirstLastAfterFilter rule spec

This commit is contained in:
Sijawusz Pur Rahnama 2022-04-04 22:17:13 +02:00
parent 119e20d5e5
commit 306bc34019

View file

@ -5,74 +5,70 @@ module Ameba::Rule::Performance
describe FirstLastAfterFilter do
it "passes if there is no potential performance improvements" do
source = Source.new %(
expect_no_issues subject, <<-CRYSTAL
[1, 2, 3].select { |e| e > 1 }
[1, 2, 3].reverse.select { |e| e > 1 }
[1, 2, 3].reverse.last
[1, 2, 3].reverse.first
[1, 2, 3].reverse.first
)
subject.catch(source).should be_valid
CRYSTAL
end
it "reports if there is select followed by last" do
source = Source.new %(
expect_issue subject, <<-CRYSTAL
[1, 2, 3].select { |e| e > 2 }.last
)
subject.catch(source).should_not be_valid
# ^^^^^^^^^^^^^^^^^^^^^^^^^^ error: Use `reverse_each.find {...}` instead of `select {...}.last`
CRYSTAL
end
it "does not report if source is a spec" do
source = Source.new %(
expect_no_issues subject, path: "source_spec.cr", code: <<-CRYSTAL
[1, 2, 3].select { |e| e > 2 }.last
), "source_spec.cr"
subject.catch(source).should be_valid
CRYSTAL
end
it "reports if there is select followed by last?" do
source = Source.new %(
expect_issue subject, <<-CRYSTAL
[1, 2, 3].select { |e| e > 2 }.last?
)
subject.catch(source).should_not be_valid
# ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: Use `reverse_each.find {...}` instead of `select {...}.last?`
CRYSTAL
end
it "reports if there is select followed by first" do
source = Source.new %(
expect_issue subject, <<-CRYSTAL
[1, 2, 3].select { |e| e > 2 }.first
)
subject.catch(source).should_not be_valid
# ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: Use `find {...}` instead of `select {...}.first`
CRYSTAL
end
it "does not report if there is selected followed by first with arguments" do
source = Source.new %(
expect_no_issues subject, <<-CRYSTAL
[1, 2, 3].select { |n| n % 2 == 0 }.first(2)
)
subject.catch(source).should be_valid
CRYSTAL
end
it "reports if there is select followed by first?" do
source = Source.new %(
expect_issue subject, <<-CRYSTAL
[1, 2, 3].select { |e| e > 2 }.first?
)
subject.catch(source).should_not be_valid
# ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: Use `find {...}` instead of `select {...}.first?`
CRYSTAL
end
it "does not report if there is select followed by any other call" do
source = Source.new %(
expect_no_issues subject, <<-CRYSTAL
[1, 2, 3].select { |e| e > 2 }.size
[1, 2, 3].select { |e| e > 2 }.any?
)
subject.catch(source).should be_valid
CRYSTAL
end
context "properties" do
it "allows to configure object_call_names" do
source = Source.new %(
[1, 2, 3].select { |e| e > 2 }.first
)
rule = Rule::Performance::FirstLastAfterFilter.new
rule.filter_names = %w(reject)
rule.catch(source).should be_valid
expect_no_issues rule, <<-CRYSTAL
[1, 2, 3].select { |e| e > 2 }.first
CRYSTAL
end
end
@ -91,58 +87,12 @@ module Ameba::Rule::Performance
issue.message.should eq "Use `find {...}` instead of `select {...}.first`"
end
it "reports a correct message for first?" do
s = Source.new %(
[1, 2, 3].select { |e| e > 2 }.first?
), "source.cr"
subject.catch(s).should_not be_valid
s.issues.size.should eq 1
issue = s.issues.first
issue.rule.should_not be_nil
issue.location.to_s.should eq "source.cr:1:11"
issue.end_location.to_s.should eq "source.cr:1:38"
issue.message.should eq "Use `find {...}` instead of `select {...}.first?`"
end
it "reports rule, pos and reverse message" do
s = Source.new %(
[1, 2, 3].select { |e| e > 2 }.last
), "source.cr"
subject.catch(s).should_not be_valid
s.issues.size.should eq 1
issue = s.issues.first
issue.rule.should_not be_nil
issue.location.to_s.should eq "source.cr:1:11"
issue.end_location.to_s.should eq "source.cr:1:36"
issue.message.should eq "Use `reverse_each.find {...}` instead of `select {...}.last`"
end
context "macro" do
it "doesn't report in macro scope" do
source = Source.new %(
{{[1, 2, 3].select { |e| e > 2 }.last }}
)
subject.catch(source).should be_valid
expect_no_issues subject, <<-CRYSTAL
{{ [1, 2, 3].select { |e| e > 2 }.last }}
CRYSTAL
end
end
it "reports a correct message for last?" do
s = Source.new %(
[1, 2, 3].select { |e| e > 2 }.last?
), "source.cr"
subject.catch(s).should_not be_valid
s.issues.size.should eq 1
issue = s.issues.first
issue.rule.should_not be_nil
issue.location.to_s.should eq "source.cr:1:11"
issue.end_location.to_s.should eq "source.cr:1:37"
issue.message.should eq "Use `reverse_each.find {...}` instead of `select {...}.last?`"
end
end
end