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Diffstat (limited to 'test/ruby/test_lambda.rb')
| -rw-r--r-- | test/ruby/test_lambda.rb | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/test/ruby/test_lambda.rb b/test/ruby/test_lambda.rb new file mode 100644 index 0000000000..c65169ac27 --- /dev/null +++ b/test/ruby/test_lambda.rb @@ -0,0 +1,181 @@ +# frozen_string_literal: false +require 'test/unit' + +class TestLambdaParameters < Test::Unit::TestCase + + def test_exact_parameter + assert_raise(ArgumentError){(1..3).each(&lambda{})} + end + + def test_call_simple + assert_equal(1, lambda{|a| a}.call(1)) + assert_equal([1,2], lambda{|a, b| [a,b]}.call(1,2)) + assert_raise(ArgumentError) { lambda{|a|}.call(1,2) } + assert_raise(ArgumentError) { lambda{|a|}.call() } + assert_raise(ArgumentError) { lambda{}.call(1) } + assert_raise(ArgumentError) { lambda{|a, b|}.call(1,2,3) } + + assert_equal(1, ->(a){ a }.call(1)) + assert_equal([1,2], ->(a,b){ [a,b] }.call(1,2)) + assert_raise(ArgumentError) { ->(a){ }.call(1,2) } + assert_raise(ArgumentError) { ->(a){ }.call() } + assert_raise(ArgumentError) { ->(){ }.call(1) } + assert_raise(ArgumentError) { ->(a,b){ }.call(1,2,3) } + end + + def test_lambda_as_iterator + a = 0 + 2.times(&->(_){ a += 1 }) + assert_equal(2, a) + assert_raise(ArgumentError) {1.times(&->(){ a += 1 })} + bug9605 = '[ruby-core:61468] [Bug #9605]' + assert_nothing_raised(ArgumentError, bug9605) {1.times(&->(n){ a += 1 })} + assert_equal(3, a, bug9605) + assert_nothing_raised(ArgumentError, bug9605) {a = [[1, 2]].map(&->(x, y) {x+y})} + assert_equal([3], a, bug9605) + end + + def test_call_rest_args + assert_equal([1,2], ->(*a){ a }.call(1,2)) + assert_equal([1,2,[]], ->(a,b,*c){ [a,b,c] }.call(1,2)) + assert_raise(ArgumentError){ ->(a,*b){ }.call() } + end + + def test_call_opt_args + assert_equal([1,2,3,4], ->(a,b,c=3,d=4){ [a,b,c,d] }.call(1,2)) + assert_equal([1,2,3,4], ->(a,b,c=0,d=4){ [a,b,c,d] }.call(1,2,3)) + assert_raise(ArgumentError){ ->(a,b=1){ }.call() } + assert_raise(ArgumentError){ ->(a,b=1){ }.call(1,2,3) } + end + + def test_call_rest_and_opt + assert_equal([1,2,3,[]], ->(a,b=2,c=3,*d){ [a,b,c,d] }.call(1)) + assert_equal([1,2,3,[]], ->(a,b=0,c=3,*d){ [a,b,c,d] }.call(1,2)) + 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)) + assert_raise(ArgumentError){ ->(a,b=1,*c){ }.call() } + end + + def test_call_with_block + f = ->(a,b,c=3,*d,&e){ [a,b,c,d,e.call(d + [a,b,c])] } + assert_equal([1,2,3,[],6], f.call(1,2){|z| z.inject{|s,x| s+x} } ) + assert_equal(nil, ->(&b){ b }.call) + foo { puts "bogus block " } + assert_equal(1, ->(&b){ b.call }.call { 1 }) + _b = nil + assert_equal(1, ->(&_b){ _b.call }.call { 1 }) + assert_nil(_b) + end + + def test_call_block_from_lambda + bug9605 = '[ruby-core:61470] [Bug #9605]' + plus = ->(x,y) {x+y} + assert_raise(ArgumentError, bug9605) {proc(&plus).call [1,2]} + end + + def test_instance_exec + bug12568 = '[ruby-core:76300] [Bug #12568]' + assert_nothing_raised(ArgumentError, bug12568) do + instance_exec([1,2,3], &->(a=[]){ a }) + end + end + + def yield_1(arg) + yield arg + end + + tap do |;bug9605, expected, result| + bug9605 = '[ruby-core:65887] [Bug #9605] arity check should be relaxed' + expected = [1,2,3] + + [ + ["array", expected], + ["to_ary", Struct.new(:to_ary).new(expected)], + ].product \ + [ + ["proc", proc {|a, b, c| [a, b, c]}], + ["lambda", lambda {|a, b, c| [a, b, c]}], + ] do + |(vtype, val), (btype, block)| + define_method("test_yield_relaxed(#{vtype},&#{btype})") do + result = assert_nothing_raised(ArgumentError, bug9605) { + break yield_1(val, &block) + } + assert_equal(expected, result, bug9605) + end + end + end + + def foo + assert_equal(nil, ->(&b){ b }.call) + end + + def test_in_basic_object + bug5966 = '[ruby-core:42349]' + called = false + BasicObject.new.instance_eval {->() {called = true}.()} + assert_equal(true, called, bug5966) + end + + def test_location_on_error + bug6151 = '[ruby-core:43314]' + called = 0 + line, f = __LINE__, lambda do + called += 1 + true + end + e = assert_raise(ArgumentError) do + f.call(42) + end + assert_send([e.backtrace.first, :start_with?, "#{__FILE__}:#{line}:"], bug6151) + assert_equal(0, called) + e = assert_raise(ArgumentError) do + 42.times(&f) + end + assert_send([e.backtrace.first, :start_with?, "#{__FILE__}:#{line}:"], bug6151) + assert_equal(0, called) + end + + def return_in_current(val) + 1.tap(&->(*) {return 0}) + val + end + + def yield_block + yield + end + + def return_in_callee(val) + yield_block(&->(*) {return 0}) + val + end + + def test_return + feature8693 = '[ruby-core:56193] [Feature #8693]' + assert_equal(42, return_in_current(42), feature8693) + assert_equal(42, return_in_callee(42), feature8693) + end + + def test_do_lambda_source_location + exp_lineno = __LINE__ + 3 + lmd = ->(x, + y, + z) do + # + end + file, lineno = lmd.source_location + assert_match(/^#{ Regexp.quote(__FILE__) }$/, file) + assert_equal(exp_lineno, lineno, "must be at the beginning of the block") + end + + def test_brace_lambda_source_location + exp_lineno = __LINE__ + 3 + lmd = ->(x, + y, + z) { + # + } + file, lineno = lmd.source_location + assert_match(/^#{ Regexp.quote(__FILE__) }$/, file) + assert_equal(exp_lineno, lineno, "must be at the beginning of the block") + end +end |