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assert('Kernel.eval', '15.3.1.2.3') do
assert_equal(10) { Kernel.eval '1 * 10' }
assert_equal('aaa') { Kernel.eval "'a' * 3" }
assert_equal(10) {
a = 10
Kernel.eval "a"
}
assert_equal(20) {
a = 10
Kernel.eval "a = 20"
a
}
assert_equal(15) {
c = 5
lambda {
a = 10
Kernel.eval "c = a + c"
}.call
c
}
assert_equal(5) {
c = 5
lambda {
Kernel.eval 'lambda { c }.call'
}.call
}
assert_equal(15) {
c = 5
lambda {
a = 10
Kernel.eval 'lambda { c = a + c }.call'
}.call
c
}
assert_equal(2) {
a = 10
Kernel.eval 'def f(a); b=a.send(:+, 1); end'
f(1)
}
end
assert('Kernel#eval', '15.3.1.3.12') do
assert_equal(10) { eval '1 * 10' }
end
assert('rest arguments of eval') do
assert_raise(ArgumentError) { Kernel.eval('0', 0, 'test', 0) }
assert_equal ['test', 'test.rb', 10] do
Kernel.eval('[\'test\', __FILE__, __LINE__]', nil, 'test.rb', 10)
end
end
assert 'eval syntax error' do
assert_raise(SyntaxError) do
eval 'p "test'
end
end
assert('String instance_eval') do
obj = Object.new
obj.instance_variable_set :@test, 'test'
assert_raise(ArgumentError) { obj.instance_eval(0) { } }
assert_raise(ArgumentError) { obj.instance_eval('0', 'test', 0, 'test') }
assert_equal(['test.rb', 10]) { obj.instance_eval('[__FILE__, __LINE__]', 'test.rb', 10)}
assert_equal('test') { obj.instance_eval('@test') }
assert_equal('test') { obj.instance_eval { @test } }
o = Object.new
assert_equal ['', o, o], o.instance_eval("[''].each { |s| break [s, o, self] }")
end
assert('Kernel.#eval(string) context') do
class TestEvalConstScope
EVAL_CONST_CLASS = 'class'
def const_string
eval 'EVAL_CONST_CLASS'
end
end
obj = TestEvalConstScope.new
assert_raise(NameError) { eval 'EVAL_CONST_CLASS' }
assert_equal('class') { obj.const_string }
end
assert('Object#instance_eval with begin-rescue-ensure execution order') do
class HellRaiser
def raise_hell
order = [:enter_raise_hell]
begin
order.push :begin
self.instance_eval("raise 'error'")
rescue
order.push :rescue
ensure
order.push :ensure
end
order
end
end
hell_raiser = HellRaiser.new
assert_equal([:enter_raise_hell, :begin, :rescue, :ensure], hell_raiser.raise_hell)
end
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