add sync API with swagger documentation at /api

test/integration/api_entries_test.rb

@@ -0,0 +1,63 @@
+require "test_helper"
+
+class ApiEntriesTest < ActionDispatch::IntegrationTest
+  test "returns active entries with language fields" do
+    entry = entries(:one)
+
+    get "/api/entries"
+
+    assert_response :success
+    payload = JSON.parse(response.body)
+    entry_payload = payload.find { |item| item["id"] == entry.id }
+
+    assert_not_nil entry_payload
+    assert_equal entry.fi, entry_payload["fi"]
+    assert_equal entry.en, entry_payload["en"]
+    assert_equal entry.sv, entry_payload["sv"]
+    assert_equal entry.no, entry_payload["no"]
+    assert_equal entry.ru, entry_payload["ru"]
+    assert_equal entry.de, entry_payload["de"]
+  end
+
+  test "filters by updated_at when since param is provided" do
+    older_entry = Entry.create!(
+      fi: "Older Entry",
+      category: :word,
+      status: :active
+    )
+    older_entry.update_column(:updated_at, 2.days.ago)
+
+    newer_entry = Entry.create!(
+      fi: "Newer Entry",
+      category: :word,
+      status: :active
+    )
+    newer_entry.update_column(:updated_at, 1.hour.ago)
+
+    get "/api/entries", params: { since: 1.day.ago.iso8601 }
+
+    assert_response :success
+    payload = JSON.parse(response.body)
+    returned_ids = payload.map { |item| item["id"] }
+
+    assert_includes returned_ids, newer_entry.id
+    assert_not_includes returned_ids, older_entry.id
+  end
+
+  test "returns bad request for invalid since param" do
+    get "/api/entries", params: { since: "not-a-time" }
+
+    assert_response :bad_request
+    payload = JSON.parse(response.body)
+    assert_equal "Invalid since parameter. Use ISO8601 timestamp.", payload["error"]
+  end
+
+  test "exposes swagger docs" do
+    get "/api/swagger"
+
+    assert_response :success
+    payload = JSON.parse(response.body)
+    assert_equal "Sanasto Wiki API", payload.dig("info", "title")
+    assert_includes payload.keys, "paths"
+  end
+end