shard-ameba/spec/ameba/rule/redundant_begin_spec.cr

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require "../../spec_helper"
module Ameba::Rule
describe RedundantBegin do
subject = RedundantBegin.new
it "passes if there is no redundant begin blocks" do
s = Source.new %(
def method
do_something
rescue
do_something_else
end
def method
do_something
do_something_else
ensure
handle_something
end
def method
yield
rescue
end
def method; end
def method; a = 1; rescue; end
def method; begin; rescue; end; end
)
subject.catch(s).should be_valid
end
it "passes if there is a correct begin block in a handler" do
s = Source.new %q(
def handler_and_expression
begin
open_file
rescue
close_file
end
do_some_stuff
end
def multiple_handlers
begin
begin1
rescue
end
begin
begin2
rescue
end
rescue
do_something_else
end
def assign_and_begin
@result ||=
begin
do_something
do_something_else
returnit
end
rescue
end
def inner_handler
s = begin
rescue
end
rescue
end
def begin_and_expression
begin
a = 1
b = 2
end
expr
end
)
subject.catch(s).should be_valid
end
it "fails if there is a redundant begin block" do
s = Source.new %q(
def method(a : String) : String
begin
open_file
do_some_stuff
ensure
close_file
end
end
)
subject.catch(s).should_not be_valid
end
it "fails if there is a redundant begin block in a method without args" do
s = Source.new %q(
def method
begin
open_file
ensure
close_file
end
end
)
subject.catch(s).should_not be_valid
end
it "fails if there is a redundant block in a method with return type" do
s = Source.new %q(
def method : String
begin
open_file
ensure
close_file
end
end
)
subject.catch(s).should_not be_valid
end
it "fails if there is a redundant block in a method with multiple args" do
s = Source.new %q(
def method(a : String,
b : String)
begin
open_file
ensure
close_file
end
end
)
subject.catch(s).should_not be_valid
end
it "fails if there is a redundant block in a method with multiple args" do
s = Source.new %q(
def method(a : String,
b : String
)
begin
open_file
ensure
close_file
end
end
)
subject.catch(s).should_not be_valid
end
it "fails if there is an inner redundant block" do
s = Source.new %q(
def method
begin
open_file
ensure
close_file
end
rescue
end
)
subject.catch(s).should_not be_valid
end
it "fails if there is a redundant block with yield" do
s = Source.new %q(
def method
begin
yield
ensure
close_file
end
end
)
subject.catch(s).should_not be_valid
end
it "fails if there is top level redundant block in a method" do
s = Source.new %q(
def method
begin
a = 1
b = 2
end
end
)
subject.catch(s).should_not be_valid
end
it "reports rule, pos and message" do
s = Source.new %q(
def method
begin
open_connection
ensure
close_connection
end
end
), "source.cr"
subject.catch(s).should_not be_valid
error = s.errors.first
error.rule.should_not be_nil
error.location.to_s.should eq "source.cr:2:9"
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error.message.should eq "Redundant `begin` block detected"
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end
end
end