69 lines
2.1 KiB
Ruby
69 lines
2.1 KiB
Ruby
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_raises(ArgumentError) { lambda{|a|}.call(1,2) }
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assert_raises(ArgumentError) { lambda{|a|}.call() }
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assert_raises(ArgumentError) { lambda{}.call(1) }
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assert_raises(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_raises(ArgumentError) { ->(a){ }.call(1,2) }
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assert_raises(ArgumentError) { ->(a){ }.call() }
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assert_raises(ArgumentError) { ->(){ }.call(1) }
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assert_raises(ArgumentError) { ->(a,b){ }.call(1,2,3) }
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end
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end
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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(a, 2)
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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_raises(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_raises(ArgumentError){ ->(a,b=1){ }.call() }
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assert_raises(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_raises(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 foo
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assert_equal(nil, ->(&b){ b }.call)
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end
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end
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