1 files changed, 97 insertions, 0 deletions
diff --git a/test/psych/test_safe_load.rb b/test/psych/test_safe_load.rb
new file mode 100644
index 0000000000..dd299c0ebf
--- /dev/null
+++ b/test/psych/test_safe_load.rb
@@ -0,0 +1,97 @@
+require 'psych/helper'
+
+module Psych
+  class TestSafeLoad < TestCase
+    class Foo; end
+
+    [1, 2.2, {}, [], "foo"].each do |obj|
+      define_method(:"test_basic_#{obj.class}") do
+        assert_safe_cycle obj
+      end
+    end
+
+    def test_no_recursion
+      x = []
+      x << x
+      assert_raises(Psych::BadAlias) do
+        Psych.safe_load Psych.dump(x)
+      end
+    end
+
+    def test_explicit_recursion
+      x = []
+      x << x
+      assert_equal(x, Psych.safe_load(Psych.dump(x), [], [], true))
+    end
+
+    def test_symbol_whitelist
+      yml = Psych.dump :foo
+      assert_raises(Psych::DisallowedClass) do
+        Psych.safe_load yml
+      end
+      assert_equal(:foo, Psych.safe_load(yml, [Symbol], [:foo]))
+    end
+
+    def test_symbol
+      assert_raises(Psych::DisallowedClass) do
+        assert_safe_cycle :foo
+      end
+      assert_raises(Psych::DisallowedClass) do
+        Psych.safe_load '--- !ruby/symbol foo', []
+      end
+      assert_safe_cycle :foo, [Symbol]
+      assert_safe_cycle :foo, %w{ Symbol }
+      assert_equal :foo, Psych.safe_load('--- !ruby/symbol foo', [Symbol])
+    end
+
+    def test_foo
+      assert_raises(Psych::DisallowedClass) do
+        Psych.safe_load '--- !ruby/object:Foo {}', [Foo]
+      end
+      assert_raises(Psych::DisallowedClass) do
+        assert_safe_cycle Foo.new
+      end
+      assert_kind_of(Foo, Psych.safe_load(Psych.dump(Foo.new), [Foo]))
+    end
+
+    X = Struct.new(:x)
+    def test_struct_depends_on_sym
+      assert_safe_cycle(X.new, [X, Symbol])
+      assert_raises(Psych::DisallowedClass) do
+        cycle X.new, [X]
+      end
+    end
+
+    def test_anon_struct
+      assert Psych.safe_load(<<-eoyml, [Struct, Symbol])
+--- !ruby/struct
+  foo: bar
+                      eoyml
+
+      assert_raises(Psych::DisallowedClass) do
+        Psych.safe_load(<<-eoyml, [Struct])
+--- !ruby/struct
+  foo: bar
+                      eoyml
+      end
+
+      assert_raises(Psych::DisallowedClass) do
+        Psych.safe_load(<<-eoyml, [Symbol])
+--- !ruby/struct
+  foo: bar
+                      eoyml
+      end
+    end
+
+    private
+
+    def cycle object, whitelist = []
+      Psych.safe_load(Psych.dump(object), whitelist)
+    end
+
+    def assert_safe_cycle object, whitelist = []
+      other = cycle object, whitelist
+      assert_equal object, other
+    end
+  end
+end