Simplify conversion process for `i` in `mrb_get_args()`

1 files changed, 7 insertions, 4 deletions

diff --git a/test/t/string.rb b/test/t/string.rb
index e563db55a..e5b001366 100644
--- a/test/t/string.rb
+++ b/test/t/string.rb
@@ -37,11 +37,14 @@ end
 assert('String#*', '15.2.10.5.5') do
   assert_equal 'aaaaa', 'a' * 5
   assert_equal '', 'a' * 0
-  assert_raise(ArgumentError) do
-    'a' * -1
-  end
+  assert_equal 'aa', 'a' * 2.1
+  assert_raise(ArgumentError) { 'a' * -1 }
+  assert_raise(RangeError) { '' * 1e30 }
+  assert_raise(RangeError) { '' * Float::INFINITY }
+  assert_raise(RangeError) { '' * Float::NAN }
+  assert_raise(TypeError) { 'a' * '1' }
+  assert_raise(TypeError) { 'a' * nil }
 end
-
 assert('String#[]', '15.2.10.5.6') do
   # length of args is 1
   a = 'abc'[0]