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require 'test/unit'
class TestNumeric < Test::Unit::TestCase
class DummyNumeric < Numeric
end
def test_coerce
a, b = 1.coerce(2)
assert_equal(Fixnum, a.class)
assert_equal(Fixnum, b.class)
a, b = 1.coerce(2.0)
assert_equal(Float, a.class)
assert_equal(Float, b.class)
assert_raise(TypeError) { -Numeric.new }
end
def test_dummynumeric
a = DummyNumeric.new
DummyNumeric.class_eval do
def coerce(x); nil; end
end
assert_raise(TypeError) { -a }
assert_nil(1 <=> a)
assert_raise(ArgumentError) { 1 <= a }
DummyNumeric.class_eval do
def coerce(x); 1.coerce(x); end
end
assert_equal(2, 1 + a)
assert_equal(0, 1 <=> a)
assert(1 <= a)
DummyNumeric.class_eval do
def coerce(x); [x, 1]; end
end
assert_equal(-1, -a)
ensure
DummyNumeric.class_eval do
remove_method :coerce
end
end
def test_numeric
a = Numeric.new
assert_raise(TypeError) { def a.foo; end }
assert_raise(TypeError) { a.dup }
end
def test_quo
assert_raise(ArgumentError) {DummyNumeric.new.quo(1)}
end
def test_divmod
DummyNumeric.class_eval do
def /(x); 42.0; end
def %(x); :mod; end
end
assert_equal(42, DummyNumeric.new.div(1))
assert_equal(:mod, DummyNumeric.new.modulo(1))
assert_equal([42, :mod], DummyNumeric.new.divmod(1))
assert_kind_of(Integer, 11.divmod(3.5).first, '[ruby-dev:34006]')
ensure
DummyNumeric.class_eval do
remove_method :/, :%
end
end
def test_scalar_p
assert(Numeric.new.scalar?)
end
def test_integer_p
assert(!Numeric.new.integer?)
end
def test_abs
a = DummyNumeric.new
DummyNumeric.class_eval do
def -@; :ok; end
def <(x); true; end
end
assert_equal(:ok, a.abs)
DummyNumeric.class_eval do
def <(x); false; end
end
assert_equal(a, a.abs)
ensure
DummyNumeric.class_eval do
remove_method :-@, :<
end
end
def test_zero_p
DummyNumeric.class_eval do
def ==(x); true; end
end
assert(DummyNumeric.new.zero?)
ensure
DummyNumeric.class_eval do
remove_method :==
end
end
def test_to_int
DummyNumeric.class_eval do
def to_i; :ok; end
end
assert_equal(:ok, DummyNumeric.new.to_int)
ensure
DummyNumeric.class_eval do
remove_method :to_i
end
end
def test_cmp
a = Numeric.new
assert_equal(0, a <=> a)
assert_nil(a <=> :foo)
end
def test_floor_ceil_round_truncate
DummyNumeric.class_eval do
def to_f; 1.5; end
end
a = DummyNumeric.new
assert_equal(1, a.floor)
assert_equal(2, a.ceil)
assert_equal(2, a.round)
assert_equal(1, a.truncate)
DummyNumeric.class_eval do
def to_f; 1.4; end
end
a = DummyNumeric.new
assert_equal(1, a.floor)
assert_equal(2, a.ceil)
assert_equal(1, a.round)
assert_equal(1, a.truncate)
DummyNumeric.class_eval do
def to_f; -1.5; end
end
a = DummyNumeric.new
assert_equal(-2, a.floor)
assert_equal(-1, a.ceil)
assert_equal(-2, a.round)
assert_equal(-1, a.truncate)
ensure
DummyNumeric.class_eval do
remove_method :to_f
end
end
def test_step
a = []
1.step(10) {|x| a << x }
assert_equal([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], a)
a = []
1.step(10, 2) {|x| a << x }
assert_equal([1, 3, 5, 7, 9], a)
assert_raise(ArgumentError) { 1.step(10, 1, 0) { } }
assert_raise(ArgumentError) { 1.step(10, 0) { } }
a = []
10.step(1, -2) {|x| a << x }
assert_equal([10, 8, 6, 4, 2], a)
a = []
1.0.step(10.0, 2.0) {|x| a << x }
assert_equal([1.0, 3.0, 5.0, 7.0, 9.0], a)
a = []
1.step(10, 2**32) {|x| a << x }
assert_equal([1], a)
a = []
10.step(1, -(2**32)) {|x| a << x }
assert_equal([10], a)
end
def test_num2long
assert_raise(TypeError) { 1 & nil }
assert_raise(TypeError) { 1 & 1.0 }
assert_raise(TypeError) { 1 & 2147483648.0 }
assert_raise(TypeError) { 1 & 9223372036854777856.0 }
o = Object.new
def o.to_int; 1; end
assert_equal(1, 1 & o)
end
def test_eql
assert(1 == 1.0)
assert(!(1.eql?(1.0)))
assert(!(1.eql?(2)))
end
end
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