Use JSONTestSuite

Author: jhawthorn

test/test_JSONTestSuite.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+# Test suite from "Parsing JSON is a Minefield"
+# https://seriot.ch/projects/parsing_json.html
+# https://github.com/nst/JSONTestSuite
+class TestJsonchecker < Minitest::Test
+  Dir["#{DATA_DIR}/JSONTestSuite/test_parsing/*.json"].each do |filename|
+    name = File.basename(filename, ".json")
+
+    define_method(:"test_#{name}") do
+      original_json = File.read(filename)
+      expectation = name[0]
+
+      if original_json.include?(0.chr)
+        return skip("FIXME: better null handling")
+      end
+
+      if expectation == "n"
+        assert_invalid_json(original_json)
+      elsif expectation == "y"
+        assert_valid_json(original_json)
+      elsif expectation == "i"
+        assert_optional_support(original_json)
+      else
+        raise "unrecognized filename: #{filenme}"
+      end
+    end
+  end
+
+  def assert_optional_support(original_json)
+    # Whatever it is, just be consistent
+    if RapidJSON.valid_json?(original_json)
+      assert_valid_json(original_json)
+    else
+      assert_invalid_json(original_json)
+    end
+  end
+
+  def assert_valid_json(original_json)
+    assert RapidJSON.valid_json?(original_json)
+    RapidJSON.parse(original_json)
+  end
+
+  def assert_invalid_json(original_json)
+    refute RapidJSON.valid_json?(original_json)
+    ex = assert_raises RapidJSON::ParseError do
+      RapidJSON.parse(original_json)
+    end
+    #re = /JSON parse error: .* \(\d+\)\z/
+    re = /JSON parse error: .*/
+    assert_match re, ex.message
+  end
+end