1 files changed, 98 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/object/to_query_test.rb b/activesupport/test/core_ext/object/to_query_test.rb
new file mode 100644
index 0000000000..561dadbbcf
--- /dev/null
+++ b/activesupport/test/core_ext/object/to_query_test.rb
@@ -0,0 +1,98 @@
+# frozen_string_literal: true
+
+require "abstract_unit"
+require "active_support/ordered_hash"
+require "active_support/core_ext/object/to_query"
+require "active_support/core_ext/string/output_safety"
+
+class ToQueryTest < ActiveSupport::TestCase
+  def test_simple_conversion
+    assert_query_equal "a=10", a: 10
+  end
+
+  def test_cgi_escaping
+    assert_query_equal "a%3Ab=c+d", "a:b" => "c d"
+  end
+
+  def test_html_safe_parameter_key
+    assert_query_equal "a%3Ab=c+d", "a:b".html_safe => "c d"
+  end
+
+  def test_html_safe_parameter_value
+    assert_query_equal "a=%5B10%5D", "a" => "[10]".html_safe
+  end
+
+  def test_nil_parameter_value
+    empty = Object.new
+    def empty.to_param; nil end
+    assert_query_equal "a=", "a" => empty
+  end
+
+  def test_nested_conversion
+    assert_query_equal "person%5Blogin%5D=seckar&person%5Bname%5D=Nicholas",
+      person: Hash[:login, "seckar", :name, "Nicholas"]
+  end
+
+  def test_multiple_nested
+    assert_query_equal "account%5Bperson%5D%5Bid%5D=20&person%5Bid%5D=10",
+      Hash[:account, { person: { id: 20 } }, :person, { id: 10 }]
+  end
+
+  def test_array_values
+    assert_query_equal "person%5Bid%5D%5B%5D=10&person%5Bid%5D%5B%5D=20",
+      person: { id: [10, 20] }
+  end
+
+  def test_array_values_are_not_sorted
+    assert_query_equal "person%5Bid%5D%5B%5D=20&person%5Bid%5D%5B%5D=10",
+      person: { id: [20, 10] }
+  end
+
+  def test_empty_array
+    assert_equal "person%5B%5D=", [].to_query("person")
+  end
+
+  def test_nested_empty_hash
+    assert_equal "",
+      {}.to_query
+    assert_query_equal "a=1&b%5Bc%5D=3",
+      a: 1, b: { c: 3, d: {} }
+    assert_query_equal "",
+      a: { b: { c: {} } }
+    assert_query_equal "b%5Bc%5D=false&b%5Be%5D=&b%5Bf%5D=&p=12",
+      p: 12, b: { c: false, e: nil, f: "" }
+    assert_query_equal "b%5Bc%5D=3&b%5Bf%5D=",
+      b: { c: 3, k: {}, f: "" }
+    assert_query_equal "b=3",
+      a: [], b: 3
+  end
+
+  def test_hash_with_namespace
+    hash = { name: "Nakshay", nationality: "Indian" }
+    assert_equal "user%5Bname%5D=Nakshay&user%5Bnationality%5D=Indian", hash.to_query("user")
+  end
+
+  def test_hash_sorted_lexicographically
+    hash = { type: "human", name: "Nakshay" }
+    assert_equal "name=Nakshay&type=human", hash.to_query
+  end
+
+  def test_hash_not_sorted_lexicographically_for_nested_structure
+    params = {
+      "foo" => {
+        "contents" => [
+          { "name" => "gorby", "id" => "123" },
+          { "name" => "puff", "d" => "true" }
+        ]
+      }
+    }
+    expected = "foo[contents][][name]=gorby&foo[contents][][id]=123&foo[contents][][name]=puff&foo[contents][][d]=true"
+
+    assert_equal expected, URI.decode_www_form_component(params.to_query)
+  end
+
+  private
+    def assert_query_equal(expected, actual)
+      assert_equal expected.split("&"), actual.to_query.split("&")
+    end
+end