feat(import): confirm column mapping in a preview before importing members

test/mv_web/live/import_live/components_test.exs

@@ -0,0 +1,31 @@
+defmodule MvWeb.ImportLive.ComponentsTest do
+  use ExUnit.Case, async: true
+
+  alias MvWeb.ImportLive.Components
+
+  describe "import_button_disabled?/2" do
+    @done_entry %{done?: true}
+
+    test "disables the Start Import button while the preview is displayed" do
+      # During :preview the upload entry is done, but re-clicking Start Import
+      # would re-run the upload processing and overwrite the current preview.
+      assert Components.import_button_disabled?(:preview, [@done_entry]) == true
+    end
+
+    test "disables the button while an import is running" do
+      assert Components.import_button_disabled?(:running, [@done_entry]) == true
+    end
+
+    test "disables the button when there are no upload entries" do
+      assert Components.import_button_disabled?(:idle, []) == true
+    end
+
+    test "disables the button while an upload entry is not yet done" do
+      assert Components.import_button_disabled?(:idle, [%{done?: false}]) == true
+    end
+
+    test "enables the button at idle with a completed upload" do
+      assert Components.import_button_disabled?(:idle, [@done_entry]) == false
+    end
+  end
+end