ruby-changes:7880
From: mame <ko1@a...>
Date: Thu, 18 Sep 2008 02:22:32 +0900 (JST)
Subject: [ruby-changes:7880] Ruby:r19401 (trunk): * test/bigdecimal/test_bigdecimal.rb: add tests to achieve over 90%
mame 2008-09-18 02:22:15 +0900 (Thu, 18 Sep 2008) New Revision: 19401 http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=19401 Log: * test/bigdecimal/test_bigdecimal.rb: add tests to achieve over 90% test coverage of bigdecimal. Added directories: trunk/test/bigdecimal/ Added files: trunk/test/bigdecimal/test_bigdecimal.rb Modified files: trunk/ChangeLog Index: ChangeLog =================================================================== --- ChangeLog (revision 19400) +++ ChangeLog (revision 19401) @@ -1,3 +1,8 @@ +Sun Jun 8 21:50:27 2008 Yusuke Endoh <mame@t...> + + * test/bigdecimal/test_bigdecimal.rb: add tests to achieve over 90% + test coverage of bigdecimal. + Wed Sep 17 21:50:14 2008 Tanaka Akira <akr@f...> * string.c (rb_str_casecmp): don't use rb_enc_codepoint. Index: test/bigdecimal/test_bigdecimal.rb =================================================================== --- test/bigdecimal/test_bigdecimal.rb (revision 0) +++ test/bigdecimal/test_bigdecimal.rb (revision 19401) @@ -0,0 +1,681 @@ +require "test/unit" +require "bigdecimal" + +class TestBigDecimal < Test::Unit::TestCase + def setup + BigDecimal.mode(BigDecimal::EXCEPTION_ALL, true) + BigDecimal.mode(BigDecimal::EXCEPTION_UNDERFLOW, true) + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, true) + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_UP) + BigDecimal.limit(0) + end + + def test_version + assert_equal("1.0.1", BigDecimal.ver) + end + + def test_global_new + assert_equal(1, BigDecimal("1")) + assert_equal(1, BigDecimal("1", 1)) + assert_raise(ArgumentError) { BigDecimal("1", -1) } + end + + def test_new + assert_equal(1, BigDecimal.new("1")) + assert_equal(1, BigDecimal.new("1", 1)) + assert_equal(1, BigDecimal.new(" 1 ")) + assert_equal(111, BigDecimal.new("1_1_1_")) + assert_equal(0, BigDecimal.new("_1_1_1")) + + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + assert_equal( 1, BigDecimal.new("Infinity").infinite?) + assert_equal(-1, BigDecimal.new("-Infinity").infinite?) + assert_equal(true, BigDecimal.new("NaN").nan?) + end + + def _test_mode(type) + BigDecimal.mode(type, true) + assert_raise(FloatDomainError) { yield } + + BigDecimal.mode(type, false) + assert_nothing_raised { yield } + end + + def test_mode + assert_raise(TypeError) { BigDecimal.mode(BigDecimal::EXCEPTION_ALL, 1) } + assert_raise(TypeError) { BigDecimal.mode(BigDecimal::ROUND_MODE, 256) } + assert_raise(TypeError) { BigDecimal.mode(0xf000, true) } + end + + def test_exception_nan + _test_mode(BigDecimal::EXCEPTION_NaN) { BigDecimal.new("NaN") } + end + + def test_exception_infinity + _test_mode(BigDecimal::EXCEPTION_INFINITY) { BigDecimal.new("Infinity") } + end + + def test_exception_underflow + _test_mode(BigDecimal::EXCEPTION_UNDERFLOW) do + x = BigDecimal.new("0.1") + 100.times do + x *= x + break if x == false + end + end + end + + def test_exception_overflow + _test_mode(BigDecimal::EXCEPTION_OVERFLOW) do + x = BigDecimal.new("10") + 100.times do + x *= x + break if x == false + end + end + end + + def test_exception_zerodivide + _test_mode(BigDecimal::EXCEPTION_ZERODIVIDE) { 1 / BigDecimal.new("0") } + _test_mode(BigDecimal::EXCEPTION_ZERODIVIDE) { -1 / BigDecimal.new("0") } + end + + def test_round_up + n4 = BigDecimal.new("4") # n4 / 9 = 0.44444... + n5 = BigDecimal.new("5") # n5 / 9 = 0.55555... + n6 = BigDecimal.new("6") # n6 / 9 = 0.66666... + m4, m5, m6 = -n4, -n5, -n6 + n2h = BigDecimal.new("2.5") + n3h = BigDecimal.new("3.5") + m2h, m3h = -n2h, -n3h + + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_UP) + assert_operator(n4, :<, n4 / 9 * 9) + assert_operator(n5, :<, n5 / 9 * 9) + assert_operator(n6, :<, n6 / 9 * 9) + assert_operator(m4, :>, m4 / 9 * 9) + assert_operator(m5, :>, m5 / 9 * 9) + assert_operator(m6, :>, m6 / 9 * 9) + assert_equal(3, n2h.round) + assert_equal(4, n3h.round) + assert_equal(-3, m2h.round) + assert_equal(-4, m3h.round) + + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_DOWN) + assert_operator(n4, :>, n4 / 9 * 9) + assert_operator(n5, :>, n5 / 9 * 9) + assert_operator(n6, :>, n6 / 9 * 9) + assert_operator(m4, :<, m4 / 9 * 9) + assert_operator(m5, :<, m5 / 9 * 9) + assert_operator(m6, :<, m6 / 9 * 9) + assert_equal(2, n2h.round) + assert_equal(3, n3h.round) + assert_equal(-2, m2h.round) + assert_equal(-3, m3h.round) + + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_UP) + assert_operator(n4, :>, n4 / 9 * 9) + assert_operator(n5, :<, n5 / 9 * 9) + assert_operator(n6, :<, n6 / 9 * 9) + assert_operator(m4, :<, m4 / 9 * 9) + assert_operator(m5, :>, m5 / 9 * 9) + assert_operator(m6, :>, m6 / 9 * 9) + assert_equal(3, n2h.round) + assert_equal(4, n3h.round) + assert_equal(-3, m2h.round) + assert_equal(-4, m3h.round) + + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_DOWN) + assert_operator(n4, :>, n4 / 9 * 9) + assert_operator(n5, :>, n5 / 9 * 9) + assert_operator(n6, :<, n6 / 9 * 9) + assert_operator(m4, :<, m4 / 9 * 9) + assert_operator(m5, :<, m5 / 9 * 9) + assert_operator(m6, :>, m6 / 9 * 9) + assert_equal(2, n2h.round) + assert_equal(3, n3h.round) + assert_equal(-2, m2h.round) + assert_equal(-3, m3h.round) + + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_HALF_EVEN) + assert_operator(n4, :>, n4 / 9 * 9) + assert_operator(n5, :<, n5 / 9 * 9) + assert_operator(n6, :<, n6 / 9 * 9) + assert_operator(m4, :<, m4 / 9 * 9) + assert_operator(m5, :>, m5 / 9 * 9) + assert_operator(m6, :>, m6 / 9 * 9) + assert_equal(2, n2h.round) + assert_equal(4, n3h.round) + assert_equal(-2, m2h.round) + assert_equal(-4, m3h.round) + + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_CEILING) + assert_operator(n4, :<, n4 / 9 * 9) + assert_operator(n5, :<, n5 / 9 * 9) + assert_operator(n6, :<, n6 / 9 * 9) + assert_operator(m4, :<, m4 / 9 * 9) + assert_operator(m5, :<, m5 / 9 * 9) + assert_operator(m6, :<, m6 / 9 * 9) + assert_equal(3, n2h.round) + assert_equal(4, n3h.round) + assert_equal(-2, m2h.round) + assert_equal(-3, m3h.round) + + BigDecimal.mode(BigDecimal::ROUND_MODE, BigDecimal::ROUND_FLOOR) + assert_operator(n4, :>, n4 / 9 * 9) + assert_operator(n5, :>, n5 / 9 * 9) + assert_operator(n6, :>, n6 / 9 * 9) + assert_operator(m4, :>, m4 / 9 * 9) + assert_operator(m5, :>, m5 / 9 * 9) + assert_operator(m6, :>, m6 / 9 * 9) + assert_equal(2, n2h.round) + assert_equal(3, n3h.round) + assert_equal(-3, m2h.round) + assert_equal(-4, m3h.round) + end + + def test_zero_p + assert_equal(true, BigDecimal.new("0").zero?) + assert_equal(false, BigDecimal.new("1").zero?) + end + + def test_nonzero_p + assert_equal(nil, BigDecimal.new("0").nonzero?) + assert_equal(BigDecimal.new("1"), BigDecimal.new("1").nonzero?) + end + + def test_double_fig + assert_kind_of(Integer, BigDecimal.double_fig) + end + + def test_cmp + n1 = BigDecimal.new("1") + n2 = BigDecimal.new("2") + assert_equal( 0, n1 <=> n1) + assert_equal( 1, n2 <=> n1) + assert_equal(-1, n1 <=> n2) + assert_operator(n1, :==, n1) + assert_operator(n1, :!=, n2) + assert_operator(n1, :<, n2) + assert_operator(n1, :<=, n1) + assert_operator(n1, :<=, n2) + assert_operator(n2, :>, n1) + assert_operator(n2, :>=, n1) + assert_operator(n1, :>=, n1) + + assert_operator(BigDecimal.new("-0"), :==, BigDecimal.new("0")) + assert_operator(BigDecimal.new("0"), :<, BigDecimal.new("1")) + assert_operator(BigDecimal.new("1"), :>, BigDecimal.new("0")) + assert_operator(BigDecimal.new("1"), :>, BigDecimal.new("-1")) + assert_operator(BigDecimal.new("-1"), :<, BigDecimal.new("1")) + assert_operator(BigDecimal.new((2**100).to_s), :>, BigDecimal.new("1")) + assert_operator(BigDecimal.new("1"), :<, BigDecimal.new((2**100).to_s)) + + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + inf = BigDecimal.new("Infinity") + assert_operator(inf, :>, 1) + assert_operator(1, :<, inf) + end + + def test_cmp_corece + n1 = BigDecimal.new("1") + n2 = BigDecimal.new("2") + o1 = Object.new; def o1.coerce(x); [x, BigDecimal.new("1")]; end + o2 = Object.new; def o2.coerce(x); [x, BigDecimal.new("2")]; end + assert_equal( 0, n1 <=> o1) + assert_equal( 1, n2 <=> o1) + assert_equal(-1, n1 <=> o2) + assert_operator(n1, :==, o1) + assert_operator(n1, :!=, o2) + assert_operator(n1, :<, o2) + assert_operator(n1, :<=, o1) + assert_operator(n1, :<=, o2) + assert_operator(n2, :>, o1) + assert_operator(n2, :>=, o1) + assert_operator(n1, :>=, 1) + end + + def test_cmp_bignum + assert_operator(BigDecimal.new((2**100).to_s), :==, 2**100) + end + + def test_cmp_data + d = Time.now; def d.coerce(x); [x, x]; end + assert_operator(BigDecimal.new((2**100).to_s), :==, d) + end + + def test_induced_from + assert_instance_of(BigDecimal, BigDecimal.induced_from(1)) + assert_raise(TypeError) do + BigDecimal.induced_from(Time.now) + end + end + + def test_precs + a = BigDecimal.new("1").precs + assert_instance_of(Array, a) + assert_equal(2, a.size) + assert_kind_of(Integer, a[0]) + assert_kind_of(Integer, a[1]) + end + + def test_hash + a = [] + x = BigDecimal.new("1") + 10.times { a << x *= 10 } + h = {} + a.each_with_index {|x, i| h[x] = i } + a.each_with_index do |x, i| + assert_equal(i, h[x]) + end + end + + def test_marshal + s = Marshal.dump(BigDecimal("1", 1)) + assert_equal(BigDecimal("1", 1), Marshal.load(s)) + + # corrupt data + s = s.gsub(/BigDecimal.*\z/m) {|x| x.gsub(/\d/m, "-") } + assert_raise(TypeError) { Marshal.load(s) } + end + + def test_finite_infinite_nan + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + + x = BigDecimal.new("0") + assert_equal(true, x.finite?) + assert_equal(nil, x.infinite?) + assert_equal(false, x.nan?) + y = 1 / x + assert_equal(false, y.finite?) + assert_equal(1, y.infinite?) + assert_equal(false, y.nan?) + y = -1 / x + assert_equal(false, y.finite?) + assert_equal(-1, y.infinite?) + assert_equal(false, y.nan?) + + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + y = 0 / x + assert_equal(false, y.finite?) + assert_equal(nil, y.infinite?) + assert_equal(true, y.nan?) + end + + def test_to_i + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + + x = BigDecimal.new("0") + assert_kind_of(Integer, x.to_i) + assert_equal(0, x.to_i) + assert_nil(( 1 / x).to_i) + assert_nil((-1 / x).to_i) + assert_nil(( 0 / x).to_i) + x = BigDecimal.new("1") + assert_equal(1, x.to_i) + x = BigDecimal.new((2**100).to_s) + assert_equal(2**100, x.to_i) + end + + def test_to_f + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + + x = BigDecimal.new("0") + assert_instance_of(Float, x.to_f) + assert_equal(0.0, x.to_f) + assert_equal( 1.0 / 0.0, ( 1 / x).to_f) + assert_equal(-1.0 / 0.0, (-1 / x).to_f) + assert_equal(true, ( 0 / x).to_f.nan?) + x = BigDecimal.new("1") + assert_equal(1.0, x.to_f) + x = BigDecimal.new((2**100).to_s) + assert_equal((2**100).to_f, x.to_f) + x = BigDecimal.new("1" + "0" * 10000) + assert_equal(0, BigDecimal.new("-0").to_f) + + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, true) + assert_raise(FloatDomainError) { x.to_f } + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + assert_kind_of(Float, x .to_f) + assert_kind_of(Float, (-x).to_f) + end + + def test_coerce + a, b = BigDecimal.new("1").coerce(1.0) + assert_instance_of(Float, a) + assert_instance_of(Float, b) + end + + def test_uplus + x = BigDecimal.new("1") + assert_equal(x, x.send(:+@)) + end + + def test_add + x = BigDecimal.new("1") + assert_equal(BigDecimal.new("2"), x + x) + assert_equal(1, BigDecimal.new("0") + 1) + assert_equal(1, x + 0) + + assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("0") + 0).sign) + assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("-0") + 0).sign) + assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (BigDecimal.new("-0") + BigDecimal.new("-0")).sign) + + x = BigDecimal.new((2**100).to_s) + assert_equal(BigDecimal.new((2**100+1).to_s), x + 1) + end + + def test_sub + x = BigDecimal.new("1") + assert_equal(BigDecimal.new("0"), x - x) + assert_equal(-1, BigDecimal.new("0") - 1) + assert_equal(1, x - 0) + + assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("0") - 0).sign) + assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (BigDecimal.new("-0") - 0).sign) + assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("-0") - BigDecimal.new("-0")).sign) + + x = BigDecimal.new((2**100).to_s) + assert_equal(BigDecimal.new((2**100-1).to_s), x - 1) + end + + def test_mult + x = BigDecimal.new((2**100).to_s) + assert_equal(BigDecimal.new((2**100 * 3).to_s), (x * 3).to_i) + assert_equal(x, (x * 1).to_i) + assert_equal(x, (BigDecimal("1") * x).to_i) + assert_equal(BigDecimal.new((2**200).to_s), (x * x).to_i) + end + + def test_div + x = BigDecimal.new((2**100).to_s) + assert_equal(BigDecimal.new((2**100 / 3).to_s), (x / 3).to_i) + assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("0") / 1).sign) + assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (BigDecimal.new("-0") / 1).sign) + assert_equal(2, BigDecimal.new("2") / 1) + assert_equal(-2, BigDecimal.new("2") / -1) + end + + def test_mod + x = BigDecimal.new((2**100).to_s) + assert_equal(1, x % 3) + assert_equal(2, (-x) % 3) + assert_equal(-2, x % -3) + assert_equal(-1, (-x) % -3) + end + + def test_remainder + x = BigDecimal.new((2**100).to_s) + assert_equal(1, x.remainder(3)) + assert_equal(-1, (-x).remainder(3)) + assert_equal(1, x.remainder(-3)) + assert_equal(-1, (-x).remainder(-3)) + end + + def test_divmod + x = BigDecimal.new((2**100).to_s) + assert_equal([(x / 3).floor, 1], x.divmod(3)) + assert_equal([(-x / 3).floor, 2], (-x).divmod(3)) + + assert_equal([0, 0], BigDecimal.new("0").divmod(2)) + + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + a, b = BigDecimal.new("0").divmod(0) + assert_equal(true, a.nan?) + assert_equal(true, b.nan?) + end + + def test_add_bigdecimal + x = BigDecimal.new((2**100).to_s) + assert_equal(3000000000000000000000000000000, x.add(x, 1)) + assert_equal(2500000000000000000000000000000, x.add(x, 2)) + assert_equal(2540000000000000000000000000000, x.add(x, 3)) + end + + def test_sub_bigdecimal + x = BigDecimal.new((2**100).to_s) + assert_equal(1000000000000000000000000000000, x.sub(1, 1)) + assert_equal(1300000000000000000000000000000, x.sub(1, 2)) + assert_equal(1270000000000000000000000000000, x.sub(1, 3)) + end + + def test_mult_bigdecimal + x = BigDecimal.new((2**100).to_s) + assert_equal(4000000000000000000000000000000, x.mult(3, 1)) + assert_equal(3800000000000000000000000000000, x.mult(3, 2)) + assert_equal(3800000000000000000000000000000, x.mult(3, 3)) + end + + def test_div_bigdecimal + x = BigDecimal.new((2**100).to_s) + assert_equal(422550200076076467165567735125, x.div(3)) + assert_equal(400000000000000000000000000000, x.div(3, 1)) + assert_equal(420000000000000000000000000000, x.div(3, 2)) + assert_equal(423000000000000000000000000000, x.div(3, 3)) + end + + def test_abs_bigdecimal + x = BigDecimal.new((2**100).to_s) + assert_equal(1267650600228229401496703205376, x.abs) + x = BigDecimal.new("-" + (2**100).to_s) + assert_equal(1267650600228229401496703205376, x.abs) + x = BigDecimal.new("0") + assert_equal(0, x.abs) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + x = BigDecimal.new("NaN") + assert_equal(true, x.abs.nan?) + end + + def test_sqrt_bigdecimal + x = BigDecimal.new("0.09") + assert_in_delta(0.3, x.sqrt(1), 0.001) + x = BigDecimal.new((2**100).to_s) + assert_equal(1125899906842624, x.sqrt(1)) + assert_equal(1125899906842624, x.sqrt(2)) + assert_equal(1125899906842624, x.sqrt(3)) # I don't understand the meaning of argument... + x = BigDecimal.new("-" + (2**100).to_s) + assert_raise(FloatDomainError) { x.sqrt(1) } + x = BigDecimal.new((2**200).to_s) + assert_equal(2**100, x.sqrt(1)) + + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + assert_raise(FloatDomainError) { BigDecimal.new("NaN").sqrt(1) } + + assert_equal(0, BigDecimal.new("0").sqrt(1)) + assert_equal(1, BigDecimal.new("1").sqrt(1)) + end + + def test_fix + x = BigDecimal.new("1.1") + assert_equal(1, x.fix) + end + + def test_frac + x = BigDecimal.new("1.1") + assert_equal(0.1, x.frac) + assert_equal(0.1, BigDecimal.new("0.1").frac) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + assert_equal(true, BigDecimal.new("NaN").frac.nan?) + end + + def test_round + assert_equal(3, BigDecimal.new("3.14159").round) + assert_equal(9, BigDecimal.new("8.7").round) + assert_equal(3.142, BigDecimal.new("3.14159").round(3)) + assert_equal(13300.0, BigDecimal.new("13345.234").round(-2)) + + x = BigDecimal.new("111.111") + assert_equal(111 , x.round) + assert_equal(111.1 , x.round(1)) + assert_equal(111.11 , x.round(2)) + assert_equal(111.111, x.round(3)) + assert_equal(111.111, x.round(4)) + assert_equal(110 , x.round(-1)) + assert_equal(100 , x.round(-2)) + assert_equal( 0 , x.round(-3)) + assert_equal( 0 , x.round(-4)) + + x = BigDecimal.new("2.5") + assert_equal(3, x.round(0, BigDecimal::ROUND_UP)) + assert_equal(2, x.round(0, BigDecimal::ROUND_DOWN)) + assert_equal(3, x.round(0, BigDecimal::ROUND_HALF_UP)) + assert_equal(2, x.round(0, BigDecimal::ROUND_HALF_DOWN)) + assert_equal(2, x.round(0, BigDecimal::ROUND_HALF_EVEN)) + assert_equal(3, x.round(0, BigDecimal::ROUND_CEILING)) + assert_equal(2, x.round(0, BigDecimal::ROUND_FLOOR)) + assert_raise(TypeError) { x.round(0, 256) } + end + + def test_truncate + assert_equal(3, BigDecimal.new("3.14159").truncate) + assert_equal(8, BigDecimal.new("8.7").truncate) + assert_equal(3.141, BigDecimal.new("3.14159").truncate(3)) + assert_equal(13300.0, BigDecimal.new("13345.234").truncate(-2)) + end + + def test_floor + assert_equal(3, BigDecimal.new("3.14159").floor) + assert_equal(-10, BigDecimal.new("-9.1").floor) + assert_equal(3.141, BigDecimal.new("3.14159").floor(3)) + assert_equal(13300.0, BigDecimal.new("13345.234").floor(-2)) + end + + def test_ceil + assert_equal(4, BigDecimal.new("3.14159").ceil) + assert_equal(-9, BigDecimal.new("-9.1").ceil) + assert_equal(3.142, BigDecimal.new("3.14159").ceil(3)) + assert_equal(13400.0, BigDecimal.new("13345.234").ceil(-2)) + end + + def test_to_s + assert_equal('-123.45678 90123 45678 9', BigDecimal.new('-123.45678901234567890').to_s('5F')) + assert_equal('+123.45678901 23456789', BigDecimal.new('123.45678901234567890').to_s('+8F')) + assert_equal(' 123.4567890123456789', BigDecimal.new('123.45678901234567890').to_s(' F')) + assert_equal('0.1234567890123456789E3', BigDecimal.new('123.45678901234567890').to_s) + assert_equal('0.12345 67890 12345 6789E3', BigDecimal.new('123.45678901234567890').to_s(5)) + end + + def test_split + x = BigDecimal.new('-123.45678901234567890') + assert_equal([-1, "1234567890123456789", 10, 3], x.split) + assert_equal([1, "0", 10, 0], BigDecimal.new("0").split) + assert_equal([-1, "0", 10, 0], BigDecimal.new("-0").split) + + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + assert_equal([0, "NaN", 10, 0], BigDecimal.new("NaN").split) + assert_equal([1, "Infinity", 10, 0], BigDecimal.new("Infinity").split) + assert_equal([-1, "Infinity", 10, 0], BigDecimal.new("-Infinity").split) + end + + def test_exponent + x = BigDecimal.new('-123.45678901234567890') + assert_equal(3, x.exponent) + end + + def test_inspect + x = BigDecimal.new("1234.5678") + assert_match(/^#<BigDecimal:[0-9a-f]+,'0.12345678E4',8\(12\)>$/, x.inspect) + end + + def test_power + x = BigDecimal.new("3") + assert_equal(81, x ** 4) + assert_equal(1.0/81, x ** -4) + assert_equal(1, x ** 0) + assert_raise(TypeError) { x ** x } + assert_equal(0, BigDecimal.new("0") ** 4) + assert_equal(1, BigDecimal.new("0") ** 0) + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + assert_equal(BigDecimal.new("Infinity"), BigDecimal.new("0") ** -1) + assert_equal(BigDecimal.new("-Infinity"), BigDecimal.new("-0") ** -1) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + assert_equal(true, (BigDecimal.new("NaN") ** 1).nan?) + assert_equal(true, (BigDecimal.new("Infinity") ** 1).nan?) # OK? + end + + def test_limit + BigDecimal.limit(1) + x = BigDecimal.new("3") + assert_equal(90, x ** 4) # OK? must it be 80? + # 3 * 3 * 3 * 3 = 10 * 3 * 3 = 30 * 3 = 90 ??? + assert_raise(ArgumentError) { BigDecimal.limit(-1) } + end + + def test_sign + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + + assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, BigDecimal.new("0").sign) + assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, BigDecimal.new("-0").sign) + assert_equal(BigDecimal::SIGN_POSITIVE_FINITE, BigDecimal.new("1").sign) + assert_equal(BigDecimal::SIGN_NEGATIVE_FINITE, BigDecimal.new("-1").sign) + assert_equal(BigDecimal::SIGN_POSITIVE_INFINITE, (BigDecimal.new("1") / 0).sign) + assert_equal(BigDecimal::SIGN_NEGATIVE_INFINITE, (BigDecimal.new("-1") / 0).sign) + assert_equal(BigDecimal::SIGN_NaN, (BigDecimal.new("0") / 0).sign) + end + + def test_inf + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + inf = BigDecimal.new("Infinity") + + assert_equal(inf, inf + inf) + assert_equal(true, (inf + (-inf)).nan?) + assert_equal(true, (inf - inf).nan?) + assert_equal(inf, inf - (-inf)) + assert_equal(inf, inf * inf) + assert_equal(true, (inf / inf).nan?) + + assert_equal(inf, inf + 1) + assert_equal(inf, inf - 1) + assert_equal(inf, inf * 1) + assert_equal(true, (inf * 0).nan?) + assert_equal(inf, inf / 1) + + assert_equal(inf, 1 + inf) + assert_equal(-inf, 1 - inf) + assert_equal(inf, 1 * inf) + assert_equal(-inf, -1 * inf) + assert_equal(true, (0 * inf).nan?) + assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (1 / inf).sign) + assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (-1 / inf).sign) + end + + def test_to_special_string + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false) + nan = BigDecimal.new("NaN") + assert_equal("NaN", nan.to_s) + inf = BigDecimal.new("Infinity") + assert_equal("Infinity", inf.to_s) + assert_equal(" Infinity", inf.to_s(" ")) + assert_equal("+Infinity", inf.to_s("+")) + assert_equal("-Infinity", (-inf).to_s) + pzero = BigDecimal.new("0") + assert_equal("0.0", pzero.to_s) + assert_equal(" 0.0", pzero.to_s(" ")) + assert_equal("+0.0", pzero.to_s("+")) + assert_equal("-0.0", (-pzero).to_s) + end + + def test_to_string + assert_equal("0.01", BigDecimal("0.01").to_s("F")) + s = "0." + "0" * 100 + "1" + assert_equal(s, BigDecimal(s).to_s("F")) + s = "1" + "0" * 100 + ".0" + assert_equal(s, BigDecimal(s).to_s("F")) + end + + def test_ctov + assert_equal(0.1, BigDecimal.new("1E-1")) + assert_equal(10, BigDecimal.new("1E+1")) + assert_equal(1, BigDecimal.new("+1")) + BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false) + assert_equal(0, BigDecimal.new("1E1" + "0" * 100)) # OK? must it be inf? + end +end Property changes on: test/bigdecimal/test_bigdecimal.rb ___________________________________________________________________ Name: svn:eol-style + LF -- ML: ruby-changes@q... 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