Fix deprecation warnings for Minitest 6 (#86)

Author: kiskoza

test/hash_test.rb

@@ -7,9 +7,9 @@
 
   it "turn the hash into xml attributes" do
     attrs = Crack::Util.to_xml_attributes(@hash)
-    attrs.must_match /one="ONE"/m
-    attrs.must_match /two="TWO"/m
-    attrs.must_match /three="it "should" work"/m
+    expect(attrs).must_match(/one="ONE"/m)
+    expect(attrs).must_match(/two="TWO"/m)
+    expect(attrs).must_match(/three="it "should" work"/m)
   end
 
   it "preserve _ in hash keys" do
@@ -19,8 +19,8 @@
       :merb                => "uses extlib"
     })
 
-    attrs.must_match /some_long_attribute="with short value"/
-    attrs.must_match /merb="uses extlib"/
-    attrs.must_match /crash="burn"/
+    expect(attrs).must_match(/some_long_attribute="with short value"/)
+    expect(attrs).must_match(/merb="uses extlib"/)
+    expect(attrs).must_match(/crash="burn"/)
   end
 end

test/json_test.rb

@@ -47,7 +47,11 @@
 
   TESTS.each do |json, expected|
     it "decode json (#{json})" do
-      Crack::JSON.parse(json).must_equal expected
+      if expected.nil?
+        assert_nil(Crack::JSON.parse(json))
+      else
+        expect(Crack::JSON.parse(json)).must_equal expected
+      end
     end
   end
 

test/parser_test.rb

@@ -2,7 +2,7 @@
 
 describe Crack::XML do
   it "default to REXMLParser" do
-    Crack::XML.parser.must_equal Crack::REXMLParser
+    expect(Crack::XML.parser).must_equal Crack::REXMLParser
   end
 
   describe "with a custom Parser" do
@@ -17,7 +17,7 @@ def self.parse(xml)
     end
 
     it "use the custom Parser" do
-      Crack::XML.parse("<xml/>").must_equal "<xml/>"
+      expect(Crack::XML.parse("<xml/>")).must_equal "<xml/>"
     end
 
     after do

test/string_test.rb

@@ -3,29 +3,29 @@
 describe Crack::Util do
   describe "snake_case" do
     it "lowercases one word CamelCase" do
-      Crack::Util.snake_case("Merb").must_equal "merb"
+      expect(Crack::Util.snake_case("Merb")).must_equal "merb"
     end
 
     it "makes one underscore snake_case two word CamelCase" do
-      Crack::Util.snake_case("MerbCore").must_equal "merb_core"
+      expect(Crack::Util.snake_case("MerbCore")).must_equal "merb_core"
     end
 
     it "handles CamelCase with more than 2 words" do
-      Crack::Util.snake_case("SoYouWantContributeToMerbCore").must_equal "so_you_want_contribute_to_merb_core"
+      expect(Crack::Util.snake_case("SoYouWantContributeToMerbCore")).must_equal "so_you_want_contribute_to_merb_core"
     end
 
     it "handles CamelCase with more than 2 capital letter in a row" do
-      Crack::Util.snake_case("CNN").must_equal "cnn"
-      Crack::Util.snake_case("CNNNews").must_equal "cnn_news"
-      Crack::Util.snake_case("HeadlineCNNNews").must_equal "headline_cnn_news"
+      expect(Crack::Util.snake_case("CNN")).must_equal "cnn"
+      expect(Crack::Util.snake_case("CNNNews")).must_equal "cnn_news"
+      expect(Crack::Util.snake_case("HeadlineCNNNews")).must_equal "headline_cnn_news"
     end
 
     it "does NOT change one word lowercase" do
-      Crack::Util.snake_case("merb").must_equal "merb"
+      expect(Crack::Util.snake_case("merb")).must_equal "merb"
     end
 
     it "leaves snake_case as is" do
-      Crack::Util.snake_case("merb_core").must_equal "merb_core"
+      expect(Crack::Util.snake_case("merb_core")).must_equal "merb_core"
     end
   end
 end