[HAR-577] GET /health returns {"status": "ok"} with 200

test/items_api/health_test.exs

@@ -0,0 +1,66 @@
+defmodule ItemsApi.HealthTest do
+  use ExUnit.Case, async: false
+
+  setup do
+    :ok = Ecto.Adapters.SQL.Sandbox.checkout(ItemsApi.Repo)
+    :ok
+  end
+
+  defp call(conn) do
+    ItemsApi.Router.call(conn, ItemsApi.Router.init([]))
+  end
+
+  describe "GET /health" do
+    test "returns HTTP 200" do
+      conn = Plug.Test.conn(:get, "/health") |> call()
+
+      assert conn.status == 200
+    end
+
+    test "returns {\"status\": \"ok\"} JSON body" do
+      conn = Plug.Test.conn(:get, "/health") |> call()
+
+      assert Jason.decode!(conn.resp_body) == %{"status" => "ok"}
+    end
+
+    test "sets content-type to application/json" do
+      conn = Plug.Test.conn(:get, "/health") |> call()
+
+      assert Plug.Conn.get_resp_header(conn, "content-type") == ["application/json"]
+    end
+
+    test "requires no request body" do
+      conn = Plug.Test.conn(:get, "/health") |> call()
+
+      assert conn.status == 200
+      assert Jason.decode!(conn.resp_body) == %{"status" => "ok"}
+    end
+
+    test "POST /health returns 404" do
+      conn = Plug.Test.conn(:post, "/health") |> call()
+
+      assert conn.status == 404
+    end
+
+    test "PUT /health returns 404" do
+      conn = Plug.Test.conn(:put, "/health") |> call()
+
+      assert conn.status == 404
+    end
+
+    test "DELETE /health returns 404" do
+      conn = Plug.Test.conn(:delete, "/health") |> call()
+
+      assert conn.status == 404
+    end
+
+    test "is idempotent across multiple calls" do
+      for _ <- 1..3 do
+        conn = Plug.Test.conn(:get, "/health") |> call()
+
+        assert conn.status == 200
+        assert Jason.decode!(conn.resp_body) == %{"status" => "ok"}
+      end
+    end
+  end
+end