mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
1279 lines
19 KiB
Ruby
1279 lines
19 KiB
Ruby
# frozen_string_literal: true
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require 'test/unit'
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verbose, $VERBOSE = $VERBOSE, nil # suppress "warning: Pattern matching is experimental, and the behavior may change in future versions of Ruby!"
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eval "\n#{<<~'END_of_GUARD'}", binding, __FILE__, __LINE__
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class TestPatternMatching < Test::Unit::TestCase
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class C
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class << self
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attr_accessor :keys
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end
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def initialize(obj)
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@obj = obj
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end
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def deconstruct
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@obj
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end
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def deconstruct_keys(keys)
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C.keys = keys
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@obj
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end
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end
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def test_basic
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assert_block do
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case 0
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in 0
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true
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else
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false
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end
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end
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assert_block do
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case 0
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in 1
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false
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else
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true
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end
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end
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assert_raise(NoMatchingPatternError) do
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case 0
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in 1
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false
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end
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end
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begin
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o = [0]
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case o
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in 1
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false
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end
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rescue => e
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assert_match o.inspect, e.message
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end
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assert_block do
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begin
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true
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ensure
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case 0
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in 0
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false
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end
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end
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end
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assert_block do
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begin
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true
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ensure
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case 0
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in 1
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else
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false
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end
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end
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end
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assert_raise(NoMatchingPatternError) do
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begin
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ensure
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case 0
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in 1
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end
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end
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end
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assert_block do
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verbose, $VERBOSE = $VERBOSE, nil # suppress "warning: Pattern matching is experimental, and the behavior may change in future versions of Ruby!"
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eval(%q{
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case true
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in a
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a
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end
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})
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ensure
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$VERBOSE = verbose
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end
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assert_block do
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tap do |a|
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tap do
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case true
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in a
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a
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end
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end
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end
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end
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assert_raise(NoMatchingPatternError) do
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o = BasicObject.new
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def o.match
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case 0
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in 1
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end
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end
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o.match
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end
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end
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def test_modifier
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assert_block do
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case 0
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in a if a == 0
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true
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end
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end
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assert_block do
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case 0
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in a if a != 0
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else
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true
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end
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end
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assert_block do
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case 0
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in a unless a != 0
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true
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end
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end
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assert_block do
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case 0
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in a unless a == 0
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else
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true
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end
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end
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end
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def test_as_pattern
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assert_block do
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case 0
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in 0 => a
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a == 0
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end
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end
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end
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def test_alternative_pattern
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assert_block do
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[0, 1].all? do |i|
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case i
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in 0 | 1
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true
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end
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end
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end
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assert_block do
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case 0
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in _ | _a
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true
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end
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end
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assert_syntax_error(%q{
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case 0
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in a | 0
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end
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}, /illegal variable in alternative pattern/)
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end
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def test_var_pattern
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# NODE_DASGN_CURR
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assert_block do
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case 0
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in a
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a == 0
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end
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end
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# NODE_DASGN
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b = 0
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assert_block do
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case 1
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in b
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b == 1
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end
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end
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# NODE_LASGN
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case 0
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in c
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assert_equal(0, c)
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else
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flunk
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end
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assert_syntax_error(%q{
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case 0
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in ^a
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end
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}, /no such local variable/)
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assert_syntax_error(%q{
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case 0
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in a, a
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end
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}, /duplicated variable name/)
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assert_block do
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case [0, 1, 2, 3]
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in _, _, _a, _a
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true
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end
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end
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assert_syntax_error(%q{
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case 0
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in a, {a:}
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end
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}, /duplicated variable name/)
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assert_syntax_error(%q{
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case 0
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in a, {"a":}
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end
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}, /duplicated variable name/)
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assert_block do
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case [0, "1"]
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in a, "#{case 1; in a; a; end}"
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true
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end
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end
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assert_syntax_error(%q{
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case [0, "1"]
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in a, "#{case 1; in a; a; end}", a
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end
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}, /duplicated variable name/)
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assert_block do
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case 0
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in a
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true
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in a
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flunk
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end
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end
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assert_syntax_error(%q{
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0 in [a, a]
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}, /duplicated variable name/)
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end
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def test_literal_value_pattern
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assert_block do
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case [nil, self, true, false]
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in [nil, self, true, false]
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true
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end
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end
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assert_block do
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case [0d170, 0D170, 0xaa, 0xAa, 0xAA, 0Xaa, 0XAa, 0XaA, 0252, 0o252, 0O252]
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in [0d170, 0D170, 0xaa, 0xAa, 0xAA, 0Xaa, 0XAa, 0XaA, 0252, 0o252, 0O252]
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true
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end
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case [0b10101010, 0B10101010, 12r, 12.3r, 1i, 12.3ri]
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in [0b10101010, 0B10101010, 12r, 12.3r, 1i, 12.3ri]
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true
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end
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end
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assert_block do
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x = 'x'
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case ['a', 'a', x]
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in ['a', "a", "#{x}"]
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true
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end
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end
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assert_block do
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case ["a\n"]
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in [<<END]
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a
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END
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true
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end
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end
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assert_block do
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case [:a, :"a"]
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in [:a, :"a"]
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true
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end
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end
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assert_block do
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case [0, 1, 2, 3, 4, 5]
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in [0..1, 0...2, 0.., 0..., (...5), (..5)]
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true
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end
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end
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assert_syntax_error(%q{
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case 0
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in a..b
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end
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}, /unexpected/)
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assert_block do
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case 'abc'
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in /a/
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true
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end
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end
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assert_block do
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case 0
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in ->(i) { i == 0 }
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true
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end
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end
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assert_block do
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case [%(a), %q(a), %Q(a), %w(a), %W(a), %i(a), %I(a), %s(a), %x(echo a), %(), %q(), %Q(), %w(), %W(), %i(), %I(), %s(), 'a']
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in [%(a), %q(a), %Q(a), %w(a), %W(a), %i(a), %I(a), %s(a), %x(echo a), %(), %q(), %Q(), %w(), %W(), %i(), %I(), %s(), %r(a)]
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true
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end
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end
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assert_block do
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case [__FILE__, __LINE__ + 1, __ENCODING__]
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in [__FILE__, __LINE__, __ENCODING__]
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true
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end
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end
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end
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def test_constant_value_pattern
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assert_block do
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case 0
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in Integer
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true
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end
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end
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assert_block do
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case 0
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in Object::Integer
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true
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end
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end
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assert_block do
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case 0
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in ::Object::Integer
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true
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end
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end
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end
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def test_pin_operator_value_pattern
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assert_block do
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a = /a/
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case 'abc'
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in ^a
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true
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end
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end
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assert_block do
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case [0, 0]
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in a, ^a
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a == 0
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end
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end
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end
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def test_array_pattern
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assert_block do
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[[0], C.new([0])].all? do |i|
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case i
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in 0,;
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true
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end
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end
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end
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assert_block do
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[[0, 1], C.new([0, 1])].all? do |i|
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case i
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in 0,;
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true
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end
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end
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end
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assert_block do
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[[], C.new([])].all? do |i|
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case i
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in 0,;
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else
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true
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end
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end
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end
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assert_block do
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[[0, 1], C.new([0, 1])].all? do |i|
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case i
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in 0, 1
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true
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end
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end
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end
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assert_block do
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[[0], C.new([0])].all? do |i|
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case i
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in 0, 1
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else
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true
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end
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end
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end
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assert_block do
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[[], C.new([])].all? do |i|
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case i
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in *a
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a == []
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end
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end
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end
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assert_block do
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[[0], C.new([0])].all? do |i|
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case i
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in *a
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a == [0]
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end
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end
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end
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assert_block do
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[[0], C.new([0])].all? do |i|
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case i
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in *a, 0, 1
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else
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true
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end
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end
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end
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assert_block do
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[[0, 1], C.new([0, 1])].all? do |i|
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case i
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in *a, 0, 1
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a == []
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end
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end
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end
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assert_block do
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[[0, 1, 2], C.new([0, 1, 2])].all? do |i|
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case i
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in *a, 1, 2
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a == [0]
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end
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end
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end
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assert_block do
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[[], C.new([])].all? do |i|
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case i
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in *;
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true
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end
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end
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end
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assert_block do
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[[0], C.new([0])].all? do |i|
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case i
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in *, 0, 1
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else
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true
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end
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end
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end
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assert_block do
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[[0, 1], C.new([0, 1])].all? do |i|
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case i
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in *, 0, 1
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true
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end
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end
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end
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assert_block do
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[[0, 1, 2], C.new([0, 1, 2])].all? do |i|
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case i
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in *, 1, 2
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true
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end
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end
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end
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assert_block do
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case C.new([0])
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in C(0)
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true
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end
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end
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assert_block do
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case C.new([0])
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in Array(0)
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else
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true
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end
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end
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assert_block do
|
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case C.new([])
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in C()
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true
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end
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end
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assert_block do
|
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case C.new([])
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in Array()
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else
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true
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end
|
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end
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|
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assert_block do
|
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case C.new([0])
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in C[0]
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true
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end
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end
|
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|
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assert_block do
|
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case C.new([0])
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in Array[0]
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else
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true
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end
|
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end
|
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|
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assert_block do
|
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case C.new([])
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in C[]
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true
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end
|
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end
|
|
|
|
assert_block do
|
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case C.new([])
|
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in Array[]
|
|
else
|
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true
|
|
end
|
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end
|
|
|
|
assert_block do
|
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case []
|
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in []
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
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case C.new([])
|
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in []
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true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
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case [0]
|
|
in [0]
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new([0])
|
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in [0]
|
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true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0]
|
|
in [0,]
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0, 1]
|
|
in [0,]
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case []
|
|
in [0, *a]
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0]
|
|
in [0, *a]
|
|
a == []
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0]
|
|
in [0, *a, 1]
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0, 1]
|
|
in [0, *a, 1]
|
|
a == []
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0, 1, 2]
|
|
in [0, *a, 2]
|
|
a == [1]
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case []
|
|
in [0, *]
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0]
|
|
in [0, *]
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0, 1]
|
|
in [0, *]
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case []
|
|
in [0, *a]
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0]
|
|
in [0, *a]
|
|
a == []
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0, 1]
|
|
in [0, *a]
|
|
a == [1]
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0]
|
|
in [0, *, 1]
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case [0, 1]
|
|
in [0, *, 1]
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
def test_hash_pattern
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in a: 0
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in a: 0
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0, b: 1}, C.new({a: 0, b: 1})].all? do |i|
|
|
case i
|
|
in a: 0
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in a: 0, b: 1
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0, b: 1}, C.new({a: 0, b: 1})].all? do |i|
|
|
case i
|
|
in a: 0, b: 1
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0, b: 1, c: 2}, C.new({a: 0, b: 1, c: 2})].all? do |i|
|
|
case i
|
|
in a: 0, b: 1
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in a:
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in a:
|
|
a == 0
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0, b: 1}, C.new({a: 0, b: 1})].all? do |i|
|
|
case i
|
|
in a:
|
|
a == 0
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in "a": 0
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in "a":;
|
|
a == 0
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in **a
|
|
a == {}
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in **a
|
|
a == {a: 0}
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in **;
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in **;
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in a:, **b
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in a:, **b
|
|
a == 0 && b == {}
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0, b: 1}, C.new({a: 0, b: 1})].all? do |i|
|
|
case i
|
|
in a:, **b
|
|
a == 0 && b == {b: 1}
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in **nil
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in **nil
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in a:, **nil
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0, b: 1}, C.new({a: 0, b: 1})].all? do |i|
|
|
case i
|
|
in a:, **nil
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new({a: 0})
|
|
in C(a: 0)
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case {a: 0}
|
|
in C(a: 0)
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new({a: 0})
|
|
in C[a: 0]
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case {a: 0}
|
|
in C[a: 0]
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in {a: 0}
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in {a: 0}
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0, b: 1}, C.new({a: 0, b: 1})].all? do |i|
|
|
case i
|
|
in {a: 0}
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{}, C.new({})].all? do |i|
|
|
case i
|
|
in {}
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
[{a: 0}, C.new({a: 0})].all? do |i|
|
|
case i
|
|
in {}
|
|
else
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
assert_syntax_error(%q{
|
|
case _
|
|
in a:, a:
|
|
end
|
|
}, /duplicated key name/)
|
|
|
|
assert_syntax_error(%q{
|
|
case _
|
|
in a?:
|
|
end
|
|
}, /key must be valid as local variables/)
|
|
|
|
assert_block do
|
|
case {a?: true}
|
|
in a?: true
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_syntax_error(%q{
|
|
case _
|
|
in "a-b":
|
|
end
|
|
}, /key must be valid as local variables/)
|
|
|
|
assert_block do
|
|
case {"a-b": true}
|
|
in "a-b": true
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_syntax_error(%q{
|
|
case _
|
|
in "#{a}": a
|
|
end
|
|
}, /symbol literal with interpolation is not allowed/)
|
|
|
|
assert_syntax_error(%q{
|
|
case _
|
|
in "#{a}":
|
|
end
|
|
}, /symbol literal with interpolation is not allowed/)
|
|
end
|
|
|
|
def test_paren
|
|
assert_block do
|
|
case 0
|
|
in (0)
|
|
true
|
|
end
|
|
end
|
|
end
|
|
|
|
def test_invalid_syntax
|
|
assert_syntax_error(%q{
|
|
case 0
|
|
in a, b:
|
|
end
|
|
}, /unexpected/)
|
|
|
|
assert_syntax_error(%q{
|
|
case 0
|
|
in [a:]
|
|
end
|
|
}, /unexpected/)
|
|
|
|
assert_syntax_error(%q{
|
|
case 0
|
|
in {a}
|
|
end
|
|
}, /unexpected/)
|
|
|
|
assert_syntax_error(%q{
|
|
case 0
|
|
in {0 => a}
|
|
end
|
|
}, /unexpected/)
|
|
end
|
|
|
|
################################################################
|
|
|
|
class CTypeError
|
|
def deconstruct
|
|
nil
|
|
end
|
|
|
|
def deconstruct_keys(keys)
|
|
nil
|
|
end
|
|
end
|
|
|
|
def test_deconstruct
|
|
assert_raise(TypeError) do
|
|
case CTypeError.new
|
|
in []
|
|
end
|
|
end
|
|
end
|
|
|
|
def test_deconstruct_keys
|
|
assert_raise(TypeError) do
|
|
case CTypeError.new
|
|
in {}
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case {}
|
|
in {}
|
|
C.keys == nil
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new({a: 0, b: 0, c: 0})
|
|
in {a: 0, b:}
|
|
C.keys == [:a, :b]
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new({a: 0, b: 0, c: 0})
|
|
in {a: 0, b:, **}
|
|
C.keys == [:a, :b]
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new({a: 0, b: 0, c: 0})
|
|
in {a: 0, b:, **r}
|
|
C.keys == nil
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new({a: 0, b: 0, c: 0})
|
|
in {**}
|
|
C.keys == []
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C.new({a: 0, b: 0, c: 0})
|
|
in {**r}
|
|
C.keys == nil
|
|
end
|
|
end
|
|
end
|
|
|
|
################################################################
|
|
|
|
class TestPatternMatchingRefinements < Test::Unit::TestCase
|
|
class C1
|
|
def deconstruct
|
|
[:C1]
|
|
end
|
|
end
|
|
|
|
class C2
|
|
end
|
|
|
|
module M
|
|
refine Array do
|
|
def deconstruct
|
|
[0]
|
|
end
|
|
end
|
|
|
|
refine Hash do
|
|
def deconstruct_keys(_)
|
|
{a: 0}
|
|
end
|
|
end
|
|
|
|
refine C2.singleton_class do
|
|
def ===(obj)
|
|
obj.kind_of?(C1)
|
|
end
|
|
end
|
|
end
|
|
|
|
using M
|
|
|
|
def test_refinements
|
|
assert_block do
|
|
case []
|
|
in [0]
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case {}
|
|
in {a: 0}
|
|
true
|
|
end
|
|
end
|
|
|
|
assert_block do
|
|
case C1.new
|
|
in C2(:C1)
|
|
true
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
################################################################
|
|
|
|
def test_struct
|
|
assert_block do
|
|
s = Struct.new(:a, :b)
|
|
case s[0, 1]
|
|
in 0, 1
|
|
true
|
|
end
|
|
end
|
|
|
|
s = Struct.new(:a, :b, keyword_init: true)
|
|
assert_block do
|
|
case s[a: 0, b: 1]
|
|
in **r
|
|
r == {a: 0, b: 1}
|
|
end
|
|
end
|
|
assert_block do
|
|
s = Struct.new(:a, :b, keyword_init: true)
|
|
case s[a: 0, b: 1]
|
|
in a:, b:
|
|
a == 0 && b == 1
|
|
end
|
|
end
|
|
assert_block do
|
|
s = Struct.new(:a, :b, keyword_init: true)
|
|
case s[a: 0, b: 1]
|
|
in a:, c:
|
|
flunk
|
|
in a:, b:, c:
|
|
flunk
|
|
in b:
|
|
b == 1
|
|
end
|
|
end
|
|
end
|
|
|
|
################################################################
|
|
|
|
def test_modifier_in
|
|
1 in a
|
|
assert_equal 1, a
|
|
assert_raise(NoMatchingPatternError) do
|
|
{a: 1} in {a: 0}
|
|
end
|
|
assert_syntax_error("if {} in {a:}; end", /void value expression/)
|
|
assert_syntax_error(%q{
|
|
1 in a, b
|
|
}, /unexpected/, '[ruby-core:95098]')
|
|
assert_syntax_error(%q{
|
|
1 in a:
|
|
}, /unexpected/, '[ruby-core:95098]')
|
|
end
|
|
end
|
|
END_of_GUARD
|
|
$VERBOSE = verbose
|