Minor cleanup for ruby 2.7 warnings and failures.

Author: zenspider

.travis.yml

@@ -12,6 +12,7 @@ rvm:
   - 2.4
   - 2.5
   - 2.6
+  - 2.7.0-preview2
   - ruby-head
   - jruby
 matrix:

lib/json/pure/parser.rb

@@ -197,7 +197,15 @@ def parse_string
       def parse_value
         case
         when scan(FLOAT)
-          @decimal_class && @decimal_class.new(self[1]) || Float(self[1])
+          if @decimal_class then
+            if @decimal_class == BigDecimal then
+              BigDecimal(self[1])
+            else
+              @decimal_class.new(self[1]) || Float(self[1])
+            end
+          else
+            Float(self[1])
+          end
         when scan(INTEGER)
           Integer(self[1])
         when scan(TRUE)

tests/json_parser_test.rb

@@ -111,7 +111,7 @@ def test_parse_numbers
 
   def test_parse_bigdecimals
     assert_equal(BigDecimal,                                 JSON.parse('{"foo": 9.01234567890123456789}', decimal_class: BigDecimal)["foo"].class)
-    assert_equal(BigDecimal.new("0.901234567890123456789E1"),JSON.parse('{"foo": 9.01234567890123456789}', decimal_class: BigDecimal)["foo"]      )
+    assert_equal(BigDecimal("0.901234567890123456789E1"),    JSON.parse('{"foo": 9.01234567890123456789}', decimal_class: BigDecimal)["foo"]      )
   end
 
   if Array.method_defined?(:permutation)