[ruby/bigdecimal] Fix exception message raised in Kernel.BigDecimal

https://github.com/ruby/bigdecimal/commit/d163f170a4
https://github.com/ruby/bigdecimal/commit/ff8eeeb064

1 files changed, 13 insertions, 1 deletions

diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb
index fbe0d7e98a..b15b046f4c 100644
--- a/test/bigdecimal/test_bigdecimal.rb
+++ b/test/bigdecimal/test_bigdecimal.rb
@@ -228,9 +228,18 @@ class TestBigDecimal < Test::Unit::TestCase
     # assert_nothing_raised(RangeError) {
     #   assert_equal(nil, BigDecimal(1i, exception: false))
     # }
-    assert_raise(TypeError) {
+    assert_raise_with_message(TypeError, "can't convert nil into BigDecimal") {
       BigDecimal(nil, exception: true)
     }
+    assert_raise_with_message(TypeError, "can't convert true into BigDecimal") {
+      BigDecimal(true, exception: true)
+    }
+    assert_raise_with_message(TypeError, "can't convert false into BigDecimal") {
+      BigDecimal(false, exception: true)
+    }
+    assert_raise_with_message(TypeError, "can't convert Object into BigDecimal") {
+      BigDecimal(Object.new, exception: true)
+    }
     assert_nothing_raised(TypeError) {
       assert_equal(nil, BigDecimal(nil, exception: false))
     }
@@ -240,6 +249,9 @@ class TestBigDecimal < Test::Unit::TestCase
     assert_nothing_raised(TypeError) {
       assert_equal(nil, BigDecimal(Object.new, exception: false))
     }
+    assert_nothing_raised(TypeError) {
+      assert_equal(nil, BigDecimal(Object.new, exception: false))
+    }
     # TODO: support to_d
     # assert_nothing_raised(TypeError) {
     #   o = Object.new