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# frozen_string_literal: true
require "irb"
require_relative "helper"
module TestIRB
class EvalHistoryTest < TestCase
def setup
save_encodings
IRB.instance_variable_get(:@CONF).clear
end
def teardown
restore_encodings
end
def execute_lines(*lines, conf: {}, main: self, irb_path: nil)
IRB.init_config(nil)
IRB.conf[:VERBOSE] = false
IRB.conf[:PROMPT_MODE] = :SIMPLE
IRB.conf[:USE_PAGER] = false
IRB.conf.merge!(conf)
input = TestInputMethod.new(lines)
irb = IRB::Irb.new(IRB::WorkSpace.new(main), input)
irb.context.return_format = "=> %s\n"
irb.context.irb_path = irb_path if irb_path
IRB.conf[:MAIN_CONTEXT] = irb.context
capture_output do
irb.eval_input
end
end
def test_eval_history_is_disabled_by_default
out, err = execute_lines(
"a = 1",
"__"
)
assert_empty(err)
assert_match(/undefined local variable or method (`|')__'/, out)
end
def test_eval_history_can_be_retrieved_with_double_underscore
out, err = execute_lines(
"a = 1",
"__",
conf: { EVAL_HISTORY: 5 }
)
assert_empty(err)
assert_match("=> 1\n" + "=> 1 1\n", out)
end
def test_eval_history_respects_given_limit
out, err = execute_lines(
"'foo'\n",
"'bar'\n",
"'baz'\n",
"'xyz'\n",
"__",
conf: { EVAL_HISTORY: 4 }
)
assert_empty(err)
# Because eval_history injects `__` into the history AND decide to ignore it, we only get <limit> - 1 results
assert_match("2 \"bar\"\n" + "3 \"baz\"\n" + "4 \"xyz\"\n", out)
end
end
end
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