diff options
Diffstat (limited to 'jni/ruby/test/bigdecimal/test_bigmath.rb')
-rw-r--r-- | jni/ruby/test/bigdecimal/test_bigmath.rb | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/jni/ruby/test/bigdecimal/test_bigmath.rb b/jni/ruby/test/bigdecimal/test_bigmath.rb new file mode 100644 index 0000000..740c755 --- /dev/null +++ b/jni/ruby/test/bigdecimal/test_bigmath.rb @@ -0,0 +1,80 @@ +require_relative "testbase" +require "bigdecimal/math" + +class TestBigMath < Test::Unit::TestCase + include TestBigDecimalBase + include BigMath + N = 20 + PINF = BigDecimal("+Infinity") + MINF = BigDecimal("-Infinity") + NAN = BigDecimal("NaN") + + def test_const + assert_in_delta(Math::PI, PI(N)) + assert_in_delta(Math::E, E(N)) + end + + def test_sqrt + assert_in_delta(2**0.5, sqrt(BigDecimal("2"), N)) + assert_equal(10, sqrt(BigDecimal("100"), N)) + assert_equal(0.0, sqrt(BigDecimal("0"), N)) + assert_equal(0.0, sqrt(BigDecimal("-0"), N)) + assert_raise(FloatDomainError) {sqrt(BigDecimal("-1.0"), N)} + assert_raise(FloatDomainError) {sqrt(NAN, N)} + assert_raise(FloatDomainError) {sqrt(PINF, N)} + end + + def test_sin + assert_in_delta(0.0, sin(BigDecimal("0.0"), N)) + assert_in_delta(Math.sqrt(2.0) / 2, sin(PI(N) / 4, N)) + assert_in_delta(1.0, sin(PI(N) / 2, N)) + assert_in_delta(0.0, sin(PI(N) * 2, N)) + assert_in_delta(0.0, sin(PI(N), N)) + assert_in_delta(-1.0, sin(PI(N) / -2, N)) + assert_in_delta(0.0, sin(PI(N) * -2, N)) + assert_in_delta(0.0, sin(-PI(N), N)) + assert_in_delta(0.0, sin(PI(N) * 21, N)) + assert_in_delta(0.0, sin(PI(N) * 30, N)) + assert_in_delta(-1.0, sin(PI(N) * BigDecimal("301.5"), N)) + end + + def test_cos + assert_in_delta(1.0, cos(BigDecimal("0.0"), N)) + assert_in_delta(Math.sqrt(2.0) / 2, cos(PI(N) / 4, N)) + assert_in_delta(0.0, cos(PI(N) / 2, N)) + assert_in_delta(1.0, cos(PI(N) * 2, N)) + assert_in_delta(-1.0, cos(PI(N), N)) + assert_in_delta(0.0, cos(PI(N) / -2, N)) + assert_in_delta(1.0, cos(PI(N) * -2, N)) + assert_in_delta(-1.0, cos(-PI(N), N)) + assert_in_delta(-1.0, cos(PI(N) * 21, N)) + assert_in_delta(1.0, cos(PI(N) * 30, N)) + assert_in_delta(0.0, cos(PI(N) * BigDecimal("301.5"), N)) + end + + def test_atan + assert_equal(0.0, atan(BigDecimal("0.0"), N)) + assert_in_delta(Math::PI/4, atan(BigDecimal("1.0"), N)) + assert_in_delta(Math::PI/6, atan(sqrt(BigDecimal("3.0"), N) / 3, N)) + assert_in_delta(Math::PI/2, atan(PINF, N)) + assert_equal(BigDecimal("0.823840753418636291769355073102514088959345624027952954058347023122539489"), + atan(BigDecimal("1.08"), 72).round(72), '[ruby-dev:41257]') + end + + def test_log + assert_equal(0, BigMath.log(BigDecimal("1.0"), 10)) + assert_in_epsilon(Math.log(10)*1000, BigMath.log(BigDecimal("1e1000"), 10)) + assert_raise(Math::DomainError) {BigMath.log(BigDecimal("0"), 10)} + assert_raise(Math::DomainError) {BigMath.log(BigDecimal("-1"), 10)} + assert_separately(%w[-rbigdecimal], <<-SRC) + begin + x = BigMath.log(BigDecimal("1E19999999999999"), 10) + rescue FloatDomainError + else + unless x.infinite? + assert_in_epsilon(Math.log(10)*19999999999999, x) + end + end + SRC + end +end |