1 files changed, 34 insertions, 0 deletions
diff --git a/activemodel/test/cases/type/float_test.rb b/activemodel/test/cases/type/float_test.rb
new file mode 100644
index 0000000000..230a8dda32
--- /dev/null
+++ b/activemodel/test/cases/type/float_test.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+
+module ActiveModel
+  module Type
+    class FloatTest < ActiveModel::TestCase
+      def test_type_cast_float
+        type = Type::Float.new
+        assert_equal 1.0, type.cast("1")
+      end
+
+      def test_type_cast_float_from_invalid_string
+        type = Type::Float.new
+        assert_nil type.cast("")
+        assert_equal 1.0, type.cast("1ignore")
+        assert_equal 0.0, type.cast("bad1")
+        assert_equal 0.0, type.cast("bad")
+      end
+
+      def test_changing_float
+        type = Type::Float.new
+
+        assert type.changed?(0.0, 0, "wibble")
+        assert type.changed?(5.0, 0, "wibble")
+        assert_not type.changed?(5.0, 5.0, "5wibble")
+        assert_not type.changed?(5.0, 5.0, "5")
+        assert_not type.changed?(5.0, 5.0, "5.0")
+        assert_not type.changed?(500.0, 500.0, "0.5E+4")
+        assert_not type.changed?(nil, nil, nil)
+      end
+    end
+  end
+end