feat(date-filter): introduce DateFilter module with URL codec and Ash query expressions

test/mv/constants_test.exs

@@ -0,0 +1,33 @@
+defmodule Mv.ConstantsTest do
+  @moduledoc """
+  Tests for Mv.Constants accessor functions. Focus is on the date filter
+  URL parameter prefixes that drive the bookmarkable filter state.
+  """
+  use ExUnit.Case, async: true
+
+  describe "date filter URL param prefixes" do
+    test "join_date_from_param/0 returns jd_from" do
+      assert Mv.Constants.join_date_from_param() == "jd_from"
+    end
+
+    test "join_date_to_param/0 returns jd_to" do
+      assert Mv.Constants.join_date_to_param() == "jd_to"
+    end
+
+    test "exit_date_mode_param/0 returns ed_mode" do
+      assert Mv.Constants.exit_date_mode_param() == "ed_mode"
+    end
+
+    test "exit_date_from_param/0 returns ed_from" do
+      assert Mv.Constants.exit_date_from_param() == "ed_from"
+    end
+
+    test "exit_date_to_param/0 returns ed_to" do
+      assert Mv.Constants.exit_date_to_param() == "ed_to"
+    end
+
+    test "custom_date_filter_prefix/0 returns cdf_" do
+      assert Mv.Constants.custom_date_filter_prefix() == "cdf_"
+    end
+  end
+end