test/ruby/test_float.rb: suppress an overflow warning

```
warning: Float 0xf.fp10000000000000... out of range
```

1 files changed, 6 insertions, 1 deletions

diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 02bafb0303..7cbf3b5a8f 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -788,7 +788,12 @@ class TestFloat < Test::Unit::TestCase
     assert_raise(ArgumentError) { Float('0xf.p0') }
     assert_raise(ArgumentError) { Float('0xf.f') }
     assert_raise(ArgumentError) { Float('0xf.fp') }
-    assert_equal(Float::INFINITY, Float('0xf.fp1000000000000000'))
+    begin
+      verbose_bak, $VERBOSE = $VERBOSE, nil
+      assert_equal(Float::INFINITY, Float('0xf.fp1000000000000000'))
+    ensure
+      $VERBOSE = verbose_bak
+    end
     assert_equal(1, suppress_warning {Float("1e10_00")}.infinite?)
     assert_raise(TypeError) { Float(nil) }
     assert_raise(TypeError) { Float(:test) }