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##
# Float ISO Test
assert('Float', '15.2.9') do
assert_equal Float.class, Class
end
assert('Float superclass', '15.2.9.2') do
assert_equal Float.superclass, Numeric
end
assert('Float#+', '15.2.9.3.1') do
a = 3.123456788 + 0.000000001
b = 3.123456789 + 1
assert_float(a, 3.123456789)
assert_float(b, 4.123456789)
end
assert('Float#-', '15.2.9.3.2') do
a = 3.123456790 - 0.000000001
b = 5.123456789 - 1
assert_float(a, 3.123456789)
assert_float(b, 4.123456789)
end
assert('Float#*', '15.2.9.3.3') do
a = 3.125 * 3.125
b = 3.125 * 1
assert_float(a, 9.765625)
assert_float(b, 3.125)
end
assert('Float#/', '15.2.9.3.4') do
a = 3.123456789 / 3.123456789
b = 3.123456789 / 1
assert_float(a, 1.0)
assert_float(b, 3.123456789)
end
assert('Float#%', '15.2.9.3.5') do
a = 3.125 % 3.125
b = 3.125 % 1
assert_float(a, 0.0)
assert_float(b, 0.125)
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 a, 1
assert_equal b, 0
assert_equal c, -1
assert_equal a2, 1
assert_equal c2, -1
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 a, 4
assert_equal b, 3
assert_equal c, -3
assert_equal d, -3
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 a, 3
assert_equal b, 3
assert_equal c, -4
assert_equal d, -3
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 b, 1
assert_equal c, -1
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 a, 3
assert_equal b, 4
assert_equal c, 3
assert_equal d, -3
assert_equal e, -4
assert_equal f, 12350
assert_equal g, 3
assert_float(h, 3.4)
assert_float(i, 3.423)
end
assert('Float#to_f', '15.2.9.3.13') do
a = 3.123456789
assert_float(a.to_f, a)
end
assert('Float#to_i', '15.2.9.3.14') do
assert_equal 3.123456789.to_i, 3
end
assert('Float#truncate', '15.2.9.3.15') do
assert_equal 3.123456789.truncate, 3
assert_equal(-3.1.truncate, -3)
end
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