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##
# Float ISO Test
assert('Float', '15.2.9') do
assert_equal Class, Float.class
end
assert('Float#+', '15.2.9.3.1') do
a = 3.123456788 + 0.000000001
b = 3.123456789 + 1
assert_float(3.123456789, a)
assert_float(4.123456789, b)
assert_raise(TypeError){ 0.0+nil }
assert_raise(TypeError){ 1.0+nil }
end
assert('Float#-', '15.2.9.3.2') do
a = 3.123456790 - 0.000000001
b = 5.123456789 - 1
assert_float(3.123456789, a)
assert_float(4.123456789, b)
end
assert('Float#*', '15.2.9.3.3') do
a = 3.125 * 3.125
b = 3.125 * 1
assert_float(9.765625, a)
assert_float(3.125 , b)
end
assert('Float#/', '15.2.9.3.4') do
a = 3.123456789 / 3.123456789
b = 3.123456789 / 1
assert_float(1.0 , a)
assert_float(3.123456789, b)
end
assert('Float#%', '15.2.9.3.5') do
a = 3.125 % 3.125
b = 3.125 % 1
assert_float(0.0 , a)
assert_float(0.125, b)
end
assert('Float#<=>', '15.2.9.3.6') do
a = 3.125 <=> 3.123
b = 3.125 <=> 3.125
c = 3.125 <=> 3.126
a2 = 3.125 <=> 3
c2 = 3.125 <=> 4
assert_equal( 1, a)
assert_equal( 0, b)
assert_equal(-1, c)
assert_equal( 1, a2)
assert_equal(-1, c2)
end
assert('Float#==', '15.2.9.3.7') do
assert_true 3.1 == 3.1
assert_false 3.1 == 3.2
end
assert('Float#ceil', '15.2.9.3.8') do
a = 3.123456789.ceil
b = 3.0.ceil
c = -3.123456789.ceil
d = -3.0.ceil
assert_equal( 4, a)
assert_equal( 3, b)
assert_equal(-3, c)
assert_equal(-3, d)
end
assert('Float#finite?', '15.2.9.3.9') do
assert_true 3.123456789.finite?
assert_false (1.0 / 0.0).finite?
end
assert('Float#floor', '15.2.9.3.10') do
a = 3.123456789.floor
b = 3.0.floor
c = -3.123456789.floor
d = -3.0.floor
assert_equal( 3, a)
assert_equal( 3, b)
assert_equal(-4, c)
assert_equal(-3, d)
end
assert('Float#infinite?', '15.2.9.3.11') do
a = 3.123456789.infinite?
b = (1.0 / 0.0).infinite?
c = (-1.0 / 0.0).infinite?
assert_nil a
assert_equal( 1, b)
assert_equal(-1, c)
end
assert('Float#round', '15.2.9.3.12') do
a = 3.123456789.round
b = 3.5.round
c = 3.4999.round
d = (-3.123456789).round
e = (-3.5).round
f = 12345.67.round(-1)
g = 3.423456789.round(0)
h = 3.423456789.round(1)
i = 3.423456789.round(3)
assert_equal( 3, a)
assert_equal( 4, b)
assert_equal( 3, c)
assert_equal( -3, d)
assert_equal( -4, e)
assert_equal(12350, f)
assert_equal( 3, g)
assert_float( 3.4, h)
assert_float(3.423, i)
assert_equal(42.0, 42.0.round(307))
assert_equal(1.0e307, 1.0e307.round(2))
inf = 1.0/0.0
assert_raise(FloatDomainError){ inf.round }
assert_raise(FloatDomainError){ inf.round(-1) }
assert_equal(inf, inf.round(1))
nan = 0.0/0.0
assert_raise(FloatDomainError){ nan.round }
assert_raise(FloatDomainError){ nan.round(-1) }
assert_true(nan.round(1).nan?)
end
assert('Float#to_f', '15.2.9.3.13') do
a = 3.123456789
assert_float(a, a.to_f)
end
assert('Float#to_i', '15.2.9.3.14') do
assert_equal(3, 3.123456789.to_i)
assert_raise(FloatDomainError) { Float::INFINITY.to_i }
assert_raise(FloatDomainError) { (-Float::INFINITY).to_i }
assert_raise(FloatDomainError) { Float::NAN.to_i }
end
assert('Float#truncate', '15.2.9.3.15') do
assert_equal( 3, 3.123456789.truncate)
assert_equal(-3, -3.1.truncate)
end
assert('Float#divmod') do
def check_floats exp, act
assert_float exp[0], act[0]
assert_float exp[1], act[1]
end
# Note: quotients are Float because mruby does not have Bignum.
check_floats [ 0, 0.0], 0.0.divmod(1)
check_floats [ 0, 1.1], 1.1.divmod(3)
check_floats [ 3, 0.2], 3.2.divmod(1)
check_floats [ 2, 6.3], 20.3.divmod(7)
check_floats [-1, 1.6], -3.4.divmod(5)
check_floats [-2, -0.5], 25.5.divmod(-13)
check_floats [ 1, -6.6], -13.6.divmod(-7)
check_floats [ 3, 0.2], 9.8.divmod(3.2)
end
assert('Float#nan?') do
assert_true (0.0/0.0).nan?
assert_false 0.0.nan?
assert_false (1.0/0.0).nan?
assert_false (-1.0/0.0).nan?
end
assert('Float#<<') do
# Left Shift by one
assert_equal 46, 23.0 << 1
# Left Shift by a negative is Right Shift
assert_equal 23, 46.0 << -1
end
assert('Float#>>') do
# Right Shift by one
assert_equal 23, 46.0 >> 1
# Right Shift by a negative is Left Shift
assert_equal 46, 23.0 >> -1
# Don't raise on large Right Shift
assert_equal 0, 23.0 >> 128
# Don't raise on large Right Shift
assert_equal(-1, -23.0 >> 128)
end