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Unused argument name suggession
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0b54b10579
commit
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2 changed files with 20 additions and 10 deletions
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@ -27,7 +27,8 @@ module Ameba::Rule
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end
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)
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subject.catch(s).should_not be_valid
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s.errors.first.message.should eq "Unused argument `c`"
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s.errors.first.message.should eq "Unused argument `c`. If it's necessary, use `_c` " \
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"as an argument name to indicate that it won't be used."
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end
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it "reports if block argument is unused" do
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@ -37,7 +38,8 @@ module Ameba::Rule
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end
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)
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subject.catch(s).should_not be_valid
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s.errors.first.message.should eq "Unused argument `i`"
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s.errors.first.message.should eq "Unused argument `i`. If it's necessary, use `_` " \
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"as an argument name to indicate that it won't be used."
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end
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it "reports if proc argument is unused" do
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@ -47,7 +49,8 @@ module Ameba::Rule
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end
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)
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subject.catch(s).should_not be_valid
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s.errors.first.message.should eq "Unused argument `b`"
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s.errors.first.message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
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"as an argument name to indicate that it won't be used."
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end
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it "reports multiple unused args" do
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@ -57,9 +60,12 @@ module Ameba::Rule
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end
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)
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subject.catch(s).should_not be_valid
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s.errors[0].message.should eq "Unused argument `a`"
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s.errors[1].message.should eq "Unused argument `b`"
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s.errors[2].message.should eq "Unused argument `c`"
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s.errors[0].message.should eq "Unused argument `a`. If it's necessary, use `_a` " \
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"as an argument name to indicate that it won't be used."
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s.errors[1].message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
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"as an argument name to indicate that it won't be used."
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s.errors[2].message.should eq "Unused argument `c`. If it's necessary, use `_c` " \
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"as an argument name to indicate that it won't be used."
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end
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it "doesn't report if it is an instance var argument" do
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@ -158,7 +164,8 @@ module Ameba::Rule
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end
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)
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subject.catch(s).should_not be_valid
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s.errors.first.message.should eq "Unused argument `b`"
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s.errors.first.message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
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"as an argument name to indicate that it won't be used."
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end
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it "reports rule, location and message" do
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@ -169,7 +176,8 @@ module Ameba::Rule
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subject.catch(s).should_not be_valid
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error = s.errors.first
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error.rule.should_not be_nil
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error.message.should eq "Unused argument `a`"
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error.message.should eq "Unused argument `a`. If it's necessary, use `_a` " \
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"as an argument name to indicate that it won't be used."
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error.location.to_s.should eq "source.cr:2:22"
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end
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end
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@ -34,7 +34,8 @@ module Ameba::Rule
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ignore_procs false
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end
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MSG = "Unused argument `%s`"
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MSG = "Unused argument `%s`. If it's necessary, use `%s` " \
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"as an argument name to indicate that it won't be used."
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def test(source)
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AST::ScopeVisitor.new self, source
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@ -56,7 +57,8 @@ module Ameba::Rule
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scope.arguments.each do |argument|
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next if argument.ignored? || scope.references?(argument.variable)
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source.error self, argument.location, MSG % argument.name
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name_suggestion = scope.node.is_a?(Crystal::Block) ? '_' : "_#{argument.name}"
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source.error self, argument.location, MSG % [argument.name, name_suggestion]
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end
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end
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end
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