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256 lines
6.3 KiB
Crystal
256 lines
6.3 KiB
Crystal
require "../../../spec_helper"
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module Ameba::Rule::Style
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subject = RedundantNext.new
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describe RedundantNext do
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it "does not report if there is no redundant next" do
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expect_no_issues subject, <<-CRYSTAL
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array.map { |x| x + 1 }
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CRYSTAL
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end
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it "reports if there is redundant next with argument in the block" do
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source = expect_issue subject, <<-CRYSTAL
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block do |v|
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next v + 1
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# ^^^^^^^^^^ error: Redundant `next` detected
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end
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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block do |v|
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v + 1
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end
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CRYSTAL
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end
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context "if" do
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it "doesn't report if there is not redundant next in if branch" do
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expect_no_issues subject, <<-CRYSTAL
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block do |v|
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next if v > 10
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end
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CRYSTAL
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end
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it "reports if there is redundant next in if/else branch" do
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source = expect_issue subject, <<-CRYSTAL
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block do |a|
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if a > 0
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next a + 1
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# ^^^^^^^^^^ error: Redundant `next` detected
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else
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next a + 2
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# ^^^^^^^^^^ error: Redundant `next` detected
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end
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end
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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block do |a|
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if a > 0
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a + 1
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else
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a + 2
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end
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end
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CRYSTAL
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end
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end
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context "unless" do
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it "doesn't report if there is no redundant next in unless branch" do
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expect_no_issues subject, <<-CRYSTAL
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block do |v|
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next unless v > 10
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end
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CRYSTAL
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end
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it "reports if there is redundant next in unless/else branch" do
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source = expect_issue subject, <<-CRYSTAL
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block do |a|
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unless a > 0
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next a + 1
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# ^^^^^^^^^^ error: Redundant `next` detected
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else
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next a + 2
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# ^^^^^^^^^^ error: Redundant `next` detected
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end
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end
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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block do |a|
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unless a > 0
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a + 1
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else
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a + 2
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end
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end
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CRYSTAL
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end
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end
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context "expressions" do
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it "doesn't report if there is no redundant next in expressions" do
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expect_no_issues subject, <<-CRYSTAL
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block do |v|
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a = 1
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a + v
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end
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CRYSTAL
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end
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it "reports if there is redundant next in expressions" do
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source = expect_issue subject, <<-CRYSTAL
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block do |a|
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a = 1
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next a
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# ^^^^^^ error: Redundant `next` detected
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end
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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block do |a|
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a = 1
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a
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end
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CRYSTAL
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end
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end
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context "binary-op" do
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it "doesn't report if there is no redundant next in binary op" do
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expect_no_issues subject, <<-CRYSTAL
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block do |v|
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a && v
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end
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CRYSTAL
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end
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it "reports if there is redundant next in binary op" do
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source = expect_issue subject, <<-CRYSTAL
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block do |a|
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a && next a
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# ^^^^^^ error: Redundant `next` detected
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end
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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block do |a|
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a && a
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end
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CRYSTAL
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end
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end
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context "exception handler" do
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it "doesn't report if there is no redundant next in exception handler" do
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expect_no_issues subject, <<-CRYSTAL
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block do |v|
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v + 1
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rescue e
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next v if v > 0
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end
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CRYSTAL
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end
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it "reports if there is redundant next in exception handler" do
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source = expect_issue subject, <<-CRYSTAL
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block do |a|
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next a + 1
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# ^^^^^^^^^^ error: Redundant `next` detected
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rescue ArgumentError
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next a + 2
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# ^^^^^^^^^^ error: Redundant `next` detected
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rescue Exception
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a + 2
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next a
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# ^^^^^^ error: Redundant `next` detected
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end
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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block do |a|
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a + 1
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rescue ArgumentError
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a + 2
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rescue Exception
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a + 2
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a
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end
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CRYSTAL
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end
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end
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it "reports correct rule, error message and position" do
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s = Source.new %(
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block do |v|
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next v + 1
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end
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), "source.cr"
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subject.catch(s).should_not be_valid
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s.issues.size.should eq 1
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issue = s.issues.first
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issue.rule.should_not be_nil
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issue.location.to_s.should eq "source.cr:2:3"
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issue.end_location.to_s.should eq "source.cr:2:12"
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issue.message.should eq "Redundant `next` detected"
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end
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context "properties" do
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context "#allow_multi_next" do
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it "allows multi next statements by default" do
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expect_no_issues subject, <<-CRYSTAL
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block do |a, b|
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next a, b
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end
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CRYSTAL
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end
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it "allows to configure multi next statements" do
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rule = RedundantNext.new
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rule.allow_multi_next = false
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source = expect_issue rule, <<-CRYSTAL
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block do |a, b|
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next a, b
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# ^^^^^^^^^ error: Redundant `next` detected
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end
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CRYSTAL
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expect_correction source, <<-CRYSTAL
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block do |a, b|
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{a, b}
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end
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CRYSTAL
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end
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end
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context "#allow_empty_next" do
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it "allows empty next statements by default" do
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expect_no_issues subject, <<-CRYSTAL
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block do
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next
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end
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CRYSTAL
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end
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it "allows to configure empty next statements" do
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rule = RedundantNext.new
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rule.allow_empty_next = false
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source = expect_issue rule, <<-CRYSTAL
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block do
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next
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# ^^^^ error: Redundant `next` detected
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end
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CRYSTAL
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expect_no_corrections source
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end
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end
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end
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end
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end
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