diff options
Diffstat (limited to 'test/-ext-/bignum/test_mul.rb')
-rw-r--r-- | test/-ext-/bignum/test_mul.rb | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_mul.rb b/test/-ext-/bignum/test_mul.rb new file mode 100644 index 0000000000..ad3b38febd --- /dev/null +++ b/test/-ext-/bignum/test_mul.rb @@ -0,0 +1,53 @@ +require 'test/unit' +require "-test-/bignum" + +class TestBignum < Test::Unit::TestCase + class TestMul < Test::Unit::TestCase + + SIZEOF_BDIGITS = Bignum::SIZEOF_BDIGITS + BITSPERDIG = Bignum::BITSPERDIG + + def test_mul_normal + x = (1 << BITSPERDIG) | 1 + y = (1 << BITSPERDIG) | 1 + z = (1 << (BITSPERDIG*2)) | (2 << BITSPERDIG) | 1 + assert_equal(z, x.big_mul_normal(y)) + end + + def test_mul_normal_zero_in_x + x = (1 << (2*BITSPERDIG)) | 1 + y = (1 << BITSPERDIG) | 1 + z = (1 << (BITSPERDIG*3)) | (1 << (BITSPERDIG*2)) | (1 << BITSPERDIG) | 1 + assert_equal(z, x.big_mul_normal(y)) + end + + def test_mul_normal_zero_in_y + x = (1 << BITSPERDIG) | 1 + y = (1 << (2*BITSPERDIG)) | 1 + z = (1 << (BITSPERDIG*3)) | (1 << (BITSPERDIG*2)) | (1 << BITSPERDIG) | 1 + assert_equal(z, x.big_mul_normal(y)) + end + + def test_mul_normal_max_max + x = (1 << (2*BITSPERDIG)) - 1 + y = (1 << (2*BITSPERDIG)) - 1 + z = (1 << (4*BITSPERDIG)) - (1 << (2*BITSPERDIG+1)) + 1 + assert_equal(z, x.big_mul_normal(y)) + end + + def test_mul_balance + x = (1 << BITSPERDIG) | 1 + y = (1 << BITSPERDIG) | 1 + z = (1 << (BITSPERDIG*2)) | (2 << BITSPERDIG) | 1 + assert_equal(z, x.big_mul_balance(y)) + end + + def test_mul_karatsuba + x = (1 << BITSPERDIG) | 1 + y = (1 << BITSPERDIG) | 1 + z = (1 << (BITSPERDIG*2)) | (2 << BITSPERDIG) | 1 + assert_equal(z, x.big_mul_karatsuba(y)) + end + + end +end |