codeql/ql/test/library-tests/dataflow/barrier-guards/barrier-guards.rb

foo = "foo"

if foo == "foo"
    foo
else
    foo
end

if ["foo"].include?(foo)
    foo
else
    foo
end

if foo != "foo"
    foo
else
    foo
end

unless foo == "foo"
    foo
else
    foo
end

unless foo != "foo"
    foo
else
    foo
end

foo