test: cover PaginationHelpersTest, teardown and ParamsNestedTest

test/test_params_nested.rb

@@ -0,0 +1,77 @@
+require 'minitest/autorun'
+require 'prism'
+require 'support'
+
+class ParamsNestedTest < Minitest::Test
+  include TestSupport
+
+  def test_nested_from_expands_bracketed_keys_into_a_hash
+    params = Prism::Params.nested_from([['post[title]', 'hi'], ['post[body]', 'yo']])
+    assert_equal 'hi', params['post']['title']
+    assert_equal 'yo', params['post']['body']
+  end
+
+  def test_nested_from_collects_trailing_brackets_into_an_array
+    params = Prism::Params.nested_from([['tags[]', 'ruby'], ['tags[]', 'web']])
+    assert_equal %w[ruby web], params['tags']
+  end
+
+  def test_nested_from_supports_an_array_nested_under_a_hash_key
+    params = Prism::Params.nested_from([['post[tags][]', 'a'], ['post[tags][]', 'b']])
+    assert_equal %w[a b], params['post']['tags']
+  end
+
+  def test_nested_from_supports_multiple_levels_of_nesting
+    params = Prism::Params.nested_from([['address[city][zip]', '00-001']])
+    assert_equal '00-001', params['address']['city']['zip']
+  end
+
+  def test_nested_from_leaves_plain_keys_untouched
+    params = Prism::Params.nested_from([['title', 'hi']])
+    assert_equal 'hi', params['title']
+  end
+
+  def test_nested_from_symbol_and_string_keys_are_interchangeable_at_every_level
+    params = Prism::Params.nested_from([['post[title]', 'hi']])
+    assert_equal 'hi', params[:post][:title]
+  end
+
+  def test_urlencoded_form_body_with_object_bracket_names_is_parsed_as_nested_params
+    request = Prism::Request.new(env_for('POST', '/posts',
+                                          headers: { 'Content-Type' => 'application/x-www-form-urlencoded' },
+                                          body: 'post%5Btitle%5D=Hello&post%5Bbody%5D=World&tags%5B%5D=a&tags%5B%5D=b'))
+    assert_equal 'Hello', request.params['post']['title']
+    assert_equal 'World', request.params['post']['body']
+    assert_equal %w[a b], request.params['tags']
+  end
+
+  def test_urlencoded_query_string_with_object_bracket_names_is_parsed_as_nested_params
+    request = Prism::Request.new(env_for('GET', '/search?filter%5Bname%5D=fox&filter%5Bactive%5D=1'))
+    assert_equal 'fox', request.params['filter']['name']
+    assert_equal '1', request.params['filter']['active']
+  end
+
+  def test_nested_form_params_survive_a_strong_parameters_require_and_permit_round_trip
+    request = Prism::Request.new(env_for('POST', '/posts',
+                                          headers: { 'Content-Type' => 'application/x-www-form-urlencoded' },
+                                          body: 'post%5Btitle%5D=Hello&post%5Badmin%5D=1'))
+    permitted = request.params.require(:post).permit(:title)
+    assert_equal({ 'title' => 'Hello' }, permitted.to_h)
+  end
+
+  def test_multipart_body_with_object_bracket_names_is_parsed_as_nested_params
+    boundary = '----ParamsNestedTestBoundary'
+    body = [
+      "--#{boundary}\r\nContent-Disposition: form-data; name=\"post[title]\"\r\n\r\nHello\r\n",
+      "--#{boundary}\r\nContent-Disposition: form-data; name=\"post[cover]\"; filename=\"a.png\"\r\n" \
+        "Content-Type: image/png\r\n\r\nbytes\r\n",
+      "--#{boundary}--\r\n"
+    ].join
+    request = Prism::Request.new(env_for('POST', '/posts',
+                                          headers: { 'Content-Type' => "multipart/form-data; boundary=#{boundary}" },
+                                          body: body))
+    assert_equal 'Hello', request.params['post']['title']
+    assert_instance_of Prism::UploadedFile, request.params['post']['cover']
+    assert_equal 'a.png', request.params['post']['cover'].original_filename
+  end
+end