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|
# frozen_string_literal: true
require "prism"
require "ripper"
require "pp"
require "test/unit"
require "tempfile"
puts "Using prism backend: #{Prism::BACKEND}" if ENV["PRISM_FFI_BACKEND"]
# It is useful to have a diff even if the strings to compare are big
# However, ruby/ruby does not have a version of Test::Unit with access to
# max_diff_target_string_size
if defined?(Test::Unit::Assertions::AssertionMessage)
Test::Unit::Assertions::AssertionMessage.max_diff_target_string_size = 5000
end
module Prism
class TestCase < ::Test::Unit::TestCase
private
if RUBY_ENGINE == "ruby"
# Check that the given source is valid syntax by compiling it with RubyVM.
def check_syntax(source)
$VERBOSE, previous = nil, $VERBOSE
begin
RubyVM::InstructionSequence.compile(source)
ensure
$VERBOSE = previous
end
end
# Assert that the given source is valid Ruby syntax by attempting to
# compile it, and then implicitly checking that it does not raise an
# syntax errors.
def assert_valid_syntax(source)
check_syntax(source)
end
# Refute that the given source is invalid Ruby syntax by attempting to
# compile it and asserting that it raises a SyntaxError.
def refute_valid_syntax(source)
assert_raise(SyntaxError) { check_syntax(source) }
end
else
def assert_valid_syntax(source)
end
def refute_valid_syntax(source)
end
end
def assert_raises(*args, &block)
raise "Use assert_raise instead"
end
def assert_equal_nodes(expected, actual, compare_location: true, parent: nil)
assert_equal expected.class, actual.class
case expected
when Array
assert_equal(
expected.size,
actual.size,
-> { "Arrays were different sizes. Parent: #{parent.pretty_inspect}" }
)
expected.zip(actual).each do |(expected_element, actual_element)|
assert_equal_nodes(
expected_element,
actual_element,
compare_location: compare_location,
parent: actual
)
end
when SourceFileNode
expected_deconstruct = expected.deconstruct_keys(nil)
actual_deconstruct = actual.deconstruct_keys(nil)
assert_equal expected_deconstruct.keys, actual_deconstruct.keys
# Filepaths can be different if test suites were run on different
# machines. We accommodate for this by comparing the basenames, and not
# the absolute filepaths.
expected_filepath = expected_deconstruct.delete(:filepath)
actual_filepath = actual_deconstruct.delete(:filepath)
assert_equal expected_deconstruct, actual_deconstruct
assert_equal File.basename(expected_filepath), File.basename(actual_filepath)
when Node
deconstructed_expected = expected.deconstruct_keys(nil)
deconstructed_actual = actual.deconstruct_keys(nil)
assert_equal deconstructed_expected.keys, deconstructed_actual.keys
deconstructed_expected.each_key do |key|
assert_equal_nodes(
deconstructed_expected[key],
deconstructed_actual[key],
compare_location: compare_location,
parent: actual
)
end
when Location
assert_operator actual.start_offset, :<=, actual.end_offset, -> {
"start_offset > end_offset for #{actual.inspect}, parent is #{parent.pretty_inspect}"
}
if compare_location
assert_equal(
expected.start_offset,
actual.start_offset,
-> { "Start locations were different. Parent: #{parent.pretty_inspect}" }
)
assert_equal(
expected.end_offset,
actual.end_offset,
-> { "End locations were different. Parent: #{parent.pretty_inspect}" }
)
end
else
assert_equal expected, actual
end
end
end
end
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