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Add tests for AST::Util#control_exp_code

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fn ⌃ ⌥ 2021-11-09 11:45:38 -08:00
parent c9ba487373
commit 01dfcbe76a
4 changed files with 56 additions and 33 deletions
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75
spec/ameba/ast/util_spec.cr
View file

@ -39,20 +39,20 @@ module Ameba::AST
describe "#node_source" do
it "returns original source of the node" do
s = %(
s = <<-CRYSTAL
a = 1
)
CRYSTAL
node = Crystal::Parser.new(s).parse
source = subject.node_source node, s.split("\n")
source.should eq "a = 1"
end
it "returns original source of multiline node" do
s = %(
s = <<-CRYSTAL
if ()
:ok
end
)
CRYSTAL
node = Crystal::Parser.new(s).parse
source = subject.node_source node, s.split("\n")
source.should eq <<-CRYSTAL
@ -63,7 +63,7 @@ module Ameba::AST
end
it "does not report source of node which has incorrect location" do
s = %q(
s = <<-'CRYSTAL'
module MyModule
macro conditional_error_for_inline_callbacks
\{%
@ -74,7 +74,7 @@ module Ameba::AST
macro before_save(x = nil)
end
end
)
CRYSTAL
node = as_nodes(s).nil_literal_nodes.first
source = subject.node_source node, s.split("\n")
@ -140,29 +140,29 @@ module Ameba::AST
end
it "returns true if this is if-else consumed by flow expressions" do
node = as_node %(
node = as_node <<-CRYSTAL
if foo
return :foo
else
return :bar
end
)
CRYSTAL
subject.flow_expression?(node, false).should eq true
end
it "returns true if this is unless-else consumed by flow expressions" do
node = as_node %(
node = as_node <<-CRYSTAL
unless foo
return :foo
else
return :bar
end
)
CRYSTAL
subject.flow_expression?(node).should eq true
end
it "returns true if this is case consumed by flow expressions" do
node = as_node %(
node = as_node <<-CRYSTAL
case
when 1
return 1
@ -171,71 +171,71 @@ module Ameba::AST
else
return 3
end
)
CRYSTAL
subject.flow_expression?(node).should eq true
end
it "returns true if this is exception handler consumed by flow expressions" do
node = as_node %(
node = as_node <<-CRYSTAL
begin
raise "exp"
rescue e
return e
end
)
CRYSTAL
subject.flow_expression?(node).should eq true
end
it "returns true if this while consumed by flow expressions" do
node = as_node %(
node = as_node <<-CRYSTAL
while true
return
end
)
CRYSTAL
subject.flow_expression?(node).should eq true
end
it "returns false if this while with break" do
node = as_node %(
node = as_node <<-CRYSTAL
while true
break
end
)
CRYSTAL
subject.flow_expression?(node).should eq false
end
it "returns true if this until consumed by flow expressions" do
node = as_node %(
node = as_node <<-CRYSTAL
until false
return
end
)
CRYSTAL
subject.flow_expression?(node).should eq true
end
it "returns false if this until with break" do
node = as_node %(
node = as_node <<-CRYSTAL
until false
break
end
)
CRYSTAL
subject.flow_expression?(node).should eq false
end
it "returns true if this expressions consumed by flow expressions" do
node = as_node %(
node = as_node <<-CRYSTAL
exp1
exp2
return
)
CRYSTAL
subject.flow_expression?(node).should eq true
end
it "returns false otherwise" do
node = as_node %(
node = as_node <<-CRYSTAL
exp1
exp2
)
CRYSTAL
subject.flow_expression?(node).should eq false
end
end
@ -322,5 +322,28 @@ module Ameba::AST
subject.loop?(node).should eq false
end
end
describe "#control_exp_code" do
it "returns the exp code of a control expression" do
s = "return 1"
node = as_node(s).as Crystal::ControlExpression
exp_code = subject.control_exp_code node, [s]
exp_code.should eq "1"
end
it "wraps implicit tuple literal with curly brackets" do
s = "return 1, 2"
node = as_node(s).as Crystal::ControlExpression
exp_code = subject.control_exp_code node, [s]
exp_code.should eq "{1, 2}"
end
it "accepts explicit tuple literal" do
s = "return {1, 2}"
node = as_node(s).as Crystal::ControlExpression
exp_code = subject.control_exp_code node, [s]
exp_code.should eq "{1, 2}"
end
end
end
end

6
src/ameba/ast/util.cr
View file

@ -161,13 +161,13 @@ module Ameba::AST::Util
# Returns the exp code of a control expression.
# Wraps implicit tuple literal with curly brackets (e.g. multi-return).
def control_exp_code(source, node : Crystal::ControlExpression)
def control_exp_code(node : Crystal::ControlExpression, code_lines)
return unless (exp = node.exp)
return unless (exp_code = node_source(exp, source.lines))
return unless (exp_code = node_source(exp, code_lines))
return exp_code unless exp.is_a?(Crystal::TupleLiteral) && exp_code[0] != '{'
return unless (exp_start = exp.elements.first.location)
return unless (exp_end = exp.end_location)
"{#{source_between(exp_start, exp_end, source.lines)}}"
"{#{source_between(exp_start, exp_end, code_lines)}}"
end
end

2
src/ameba/rule/style/redundant_next.cr
View file

@ -116,7 +116,7 @@ module Ameba::Rule::Style
return if allow_multi_next && node.exp.is_a?(Crystal::TupleLiteral)
return if allow_empty_next && (node.exp.nil? || node.exp.not_nil!.nop?)
if (exp_code = control_exp_code(source, node))
if (exp_code = control_exp_code(node, source.lines))
issue_for node, MSG do |corrector|
corrector.replace(node, exp_code)
end

2
src/ameba/rule/style/redundant_return.cr
View file

@ -113,7 +113,7 @@ module Ameba::Rule::Style
return if allow_multi_return && node.exp.is_a?(Crystal::TupleLiteral)
return if allow_empty_return && (node.exp.nil? || node.exp.not_nil!.nop?)
if (exp_code = control_exp_code(source, node))
if (exp_code = control_exp_code(node, source.lines))
issue_for node, MSG do |corrector|
corrector.replace(node, exp_code)
end