mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
245 lines
7 KiB
Ruby
245 lines
7 KiB
Ruby
# frozen_string_literal: false
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require 'test/unit'
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class TestLambdaParameters < Test::Unit::TestCase
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def test_exact_parameter
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assert_raise(ArgumentError){(1..3).each(&lambda{})}
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end
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def test_call_simple
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assert_equal(1, lambda{|a| a}.call(1))
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assert_equal([1,2], lambda{|a, b| [a,b]}.call(1,2))
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assert_raise(ArgumentError) { lambda{|a|}.call(1,2) }
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assert_raise(ArgumentError) { lambda{|a|}.call() }
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assert_raise(ArgumentError) { lambda{}.call(1) }
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assert_raise(ArgumentError) { lambda{|a, b|}.call(1,2,3) }
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assert_equal(1, ->(a){ a }.call(1))
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assert_equal([1,2], ->(a,b){ [a,b] }.call(1,2))
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assert_raise(ArgumentError) { ->(a){ }.call(1,2) }
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assert_raise(ArgumentError) { ->(a){ }.call() }
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assert_raise(ArgumentError) { ->(){ }.call(1) }
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assert_raise(ArgumentError) { ->(a,b){ }.call(1,2,3) }
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end
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def test_lambda_as_iterator
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a = 0
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2.times(&->(_){ a += 1 })
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assert_equal(2, a)
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assert_raise(ArgumentError) {1.times(&->(){ a += 1 })}
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bug9605 = '[ruby-core:61468] [Bug #9605]'
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assert_nothing_raised(ArgumentError, bug9605) {1.times(&->(n){ a += 1 })}
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assert_equal(3, a, bug9605)
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assert_nothing_raised(ArgumentError, bug9605) {
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a = %w(Hi there how are you).each_with_index.detect(&->(w, i) {w.length == 3})
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}
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assert_equal(["how", 2], a, bug9605)
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end
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def test_call_rest_args
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assert_equal([1,2], ->(*a){ a }.call(1,2))
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assert_equal([1,2,[]], ->(a,b,*c){ [a,b,c] }.call(1,2))
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assert_raise(ArgumentError){ ->(a,*b){ }.call() }
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end
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def test_call_opt_args
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assert_equal([1,2,3,4], ->(a,b,c=3,d=4){ [a,b,c,d] }.call(1,2))
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assert_equal([1,2,3,4], ->(a,b,c=0,d=4){ [a,b,c,d] }.call(1,2,3))
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assert_raise(ArgumentError){ ->(a,b=1){ }.call() }
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assert_raise(ArgumentError){ ->(a,b=1){ }.call(1,2,3) }
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end
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def test_call_rest_and_opt
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assert_equal([1,2,3,[]], ->(a,b=2,c=3,*d){ [a,b,c,d] }.call(1))
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assert_equal([1,2,3,[]], ->(a,b=0,c=3,*d){ [a,b,c,d] }.call(1,2))
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assert_equal([1,2,3,[4,5,6]], ->(a,b=0,c=0,*d){ [a,b,c,d] }.call(1,2,3,4,5,6))
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assert_raise(ArgumentError){ ->(a,b=1,*c){ }.call() }
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end
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def test_call_with_block
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f = ->(a,b,c=3,*d,&e){ [a,b,c,d,e.call(d + [a,b,c])] }
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assert_equal([1,2,3,[],6], f.call(1,2){|z| z.inject{|s,x| s+x} } )
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assert_equal(nil, ->(&b){ b }.call)
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foo { puts "bogus block " }
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assert_equal(1, ->(&b){ b.call }.call { 1 })
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_b = nil
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assert_equal(1, ->(&_b){ _b.call }.call { 1 })
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assert_nil(_b)
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end
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def test_call_block_from_lambda
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bug9605 = '[ruby-core:61470] [Bug #9605]'
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plus = ->(x,y) {x+y}
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assert_raise(ArgumentError, bug9605) {proc(&plus).call [1,2]}
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end
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def pass_along(&block)
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lambda(&block)
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end
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def pass_along2(&block)
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pass_along(&block)
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end
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def test_create_non_lambda_for_proc_one_level
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f = pass_along {}
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refute_predicate(f, :lambda?, '[Bug #15620]')
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assert_nothing_raised(ArgumentError) { f.call(:extra_arg) }
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end
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def test_create_non_lambda_for_proc_two_levels
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f = pass_along2 {}
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refute_predicate(f, :lambda?, '[Bug #15620]')
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assert_nothing_raised(ArgumentError) { f.call(:extra_arg) }
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end
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def test_instance_exec
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bug12568 = '[ruby-core:76300] [Bug #12568]'
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assert_nothing_raised(ArgumentError, bug12568) do
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instance_exec([1,2,3], &->(a=[]){ a })
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end
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end
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def test_instance_eval_return
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bug13090 = '[ruby-core:78917] [Bug #13090] cannot return in lambdas'
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x = :ng
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assert_nothing_raised(LocalJumpError) do
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x = instance_eval(&->(_){return :ok})
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end
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ensure
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assert_equal(:ok, x, bug13090)
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end
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def test_instance_exec_return
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bug13090 = '[ruby-core:78917] [Bug #13090] cannot return in lambdas'
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x = :ng
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assert_nothing_raised(LocalJumpError) do
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x = instance_exec(&->(){return :ok})
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end
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ensure
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assert_equal(:ok, x, bug13090)
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end
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def test_arity_error
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assert_raise(ArgumentError, '[Bug #12705]') do
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[1, 2].tap(&lambda {|a, b|})
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end
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end
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def foo
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assert_equal(nil, ->(&b){ b }.call)
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end
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def test_in_basic_object
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bug5966 = '[ruby-core:42349]'
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called = false
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BasicObject.new.instance_eval {->() {called = true}.()}
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assert_equal(true, called, bug5966)
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end
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def test_location_on_error
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bug6151 = '[ruby-core:43314]'
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called = 0
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line, f = __LINE__, lambda do
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called += 1
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true
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end
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e = assert_raise(ArgumentError) do
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f.call(42)
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end
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assert_send([e.backtrace.first, :start_with?, "#{__FILE__}:#{line}:"], bug6151)
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assert_equal(0, called)
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e = assert_raise(ArgumentError) do
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42.times(&f)
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end
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assert_send([e.backtrace.first, :start_with?, "#{__FILE__}:#{line}:"], bug6151)
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assert_equal(0, called)
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end
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def return_in_current(val)
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1.tap(&->(*) {return 0})
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val
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end
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def yield_block
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yield
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end
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def return_in_callee(val)
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yield_block(&->(*) {return 0})
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val
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end
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def test_return
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feature8693 = '[ruby-core:56193] [Feature #8693]'
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assert_equal(42, return_in_current(42), feature8693)
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assert_equal(42, return_in_callee(42), feature8693)
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end
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def break_in_current(val)
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1.tap(&->(*) {break 0})
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val
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end
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def break_in_callee(val)
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yield_block(&->(*) {break 0})
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val
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end
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def test_break
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assert_equal(42, break_in_current(42))
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assert_equal(42, break_in_callee(42))
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end
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def test_do_lambda_source_location
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exp_lineno = __LINE__ + 3
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lmd = ->(x,
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y,
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z) do
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#
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end
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file, lineno = lmd.source_location
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assert_match(/^#{ Regexp.quote(__FILE__) }$/, file)
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assert_equal(exp_lineno, lineno, "must be at the beginning of the block")
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end
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def test_brace_lambda_source_location
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exp_lineno = __LINE__ + 3
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lmd = ->(x,
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y,
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z) {
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#
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}
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file, lineno = lmd.source_location
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assert_match(/^#{ Regexp.quote(__FILE__) }$/, file)
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assert_equal(exp_lineno, lineno, "must be at the beginning of the block")
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end
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def test_not_orphan_return
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assert_equal(42, Module.new { extend self
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def m1(&b) b.call end; def m2(); m1(&-> { return 42 }) end }.m2)
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assert_equal(42, Module.new { extend self
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def m1(&b) b end; def m2(); m1(&-> { return 42 }).call end }.m2)
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assert_equal(42, Module.new { extend self
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def m1(&b) b end; def m2(); m1(&-> { return 42 }) end }.m2.call)
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end
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def test_not_orphan_break
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assert_equal(42, Module.new { extend self
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def m1(&b) b.call end; def m2(); m1(&-> { break 42 }) end }.m2)
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assert_equal(42, Module.new { extend self
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def m1(&b) b end; def m2(); m1(&-> { break 42 }).call end }.m2)
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assert_equal(42, Module.new { extend self
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def m1(&b) b end; def m2(); m1(&-> { break 42 }) end }.m2.call)
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end
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def test_not_orphan_next
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assert_equal(42, Module.new { extend self
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def m1(&b) b.call end; def m2(); m1(&-> { next 42 }) end }.m2)
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assert_equal(42, Module.new { extend self
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def m1(&b) b end; def m2(); m1(&-> { next 42 }).call end }.m2)
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assert_equal(42, Module.new { extend self
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def m1(&b) b end; def m2(); m1(&-> { next 42 }) end }.m2.call)
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end
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end
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