[ruby/bigdecimal] Fix for the coerce cases in divide and DoDivmod

1cb92487f7

test/bigdecimal/test_bigdecimal.rb

@@ -963,6 +963,15 @@ class TestBigDecimal < Test::Unit::TestCase
     assert_kind_of(BigDecimal, BigDecimal("3") / 1.quo(3))
   end
 
+  def test_div_with_complex
+    q = BigDecimal("3") / 1i
+    assert_kind_of(Complex, q)
+  end
+
+  def test_div_error
+    assert_raise(TypeError) { BigDecimal(20) / '2' }
+  end
+
   def test_mod
     x = BigDecimal((2**100).to_s)
     assert_equal(1, x % 3)
@@ -1006,6 +1015,10 @@ class TestBigDecimal < Test::Unit::TestCase
     assert_raise(ZeroDivisionError){BigDecimal("0").divmod(0)}
   end
 
+  def test_divmod_error
+    assert_raise(TypeError) { BigDecimal(20).divmod('2') }
+  end
+
   def test_add_bigdecimal
     x = BigDecimal((2**100).to_s)
     assert_equal(3000000000000000000000000000000, x.add(x, 1))