Maybe/test/controllers/transactions_controller_test.rb

require "test_helper"

class TransactionsControllerTest < ActionDispatch::IntegrationTest
  setup do
    sign_in @user = users(:family_admin)
    @transaction = transactions(:checking_one)
    @recent_transactions = @user.family.transactions.ordered.limit(20).to_a
  end

  test "should get paginated index with most recent transactions first" do
    get transactions_url
    assert_response :success

    @recent_transactions.first(10).each do |transaction|
      assert_dom "#" + dom_id(transaction), count: 1
    end
  end

  test "transaction count represents filtered total" do
    get transactions_url
    assert_dom "#total-transactions", count: 1, text: @user.family.transactions.count.to_s

    new_transaction = @user.family.accounts.first.transactions.create! \
      name: "Transaction to search for",
      date: Date.current,
      amount: 0

    get transactions_url(q: { search: new_transaction.name })

    # Only finds 1 transaction that matches filter
    assert_dom "#" + dom_id(new_transaction), count: 1
    assert_dom "#total-transactions", count: 1, text: "1"
  end

  test "can navigate to paginated result" do
    get transactions_url(page: 2)
    assert_response :success

    @recent_transactions[10, 10].each do |transaction|
      assert_dom "#" + dom_id(transaction), count: 1
    end
  end

  test "loads last page when page is out of range" do
    user_oldest_transaction = @user.family.transactions.ordered.last
    get transactions_url(page: 9999999999)

    assert_response :success
    assert_dom "#" + dom_id(user_oldest_transaction), count: 1
  end

  test "should get new" do
    get new_transaction_url
    assert_response :success
  end

  test "prefills account_id if provided" do
    get new_transaction_url(account_id: @transaction.account_id)
    assert_response :success
    assert_select "option[selected][value='#{@transaction.account_id}']"
  end

  test "should create transaction" do
    account = @user.family.accounts.first
    transaction_params = {
      account_id: account.id,
      amount: 100.45,
      currency: "USD",
      date: Date.current,
      name: "Test transaction"
    }

    assert_difference("Transaction.count") do
      post transactions_url, params: { transaction: transaction_params }
    end

    assert_equal transaction_params[:amount].to_d, Transaction.order(created_at: :desc).first.amount
    assert_equal flash[:notice], "New transaction created successfully"
    assert_enqueued_with(job: AccountSyncJob)
    assert_redirected_to transactions_url
  end

  test "expenses are positive" do
    assert_difference("Transaction.count") do
      post transactions_url, params: { transaction: {
        nature: "expense",
        account_id: @transaction.account_id,
        amount: @transaction.amount,
        currency: @transaction.currency,
        date: @transaction.date,
        name: @transaction.name } }
    end

    assert_redirected_to transactions_url
    assert Transaction.order(created_at: :desc).first.amount.positive?, "Amount should be positive"
  end

  test "incomes are negative" do
    assert_difference("Transaction.count") do
      post transactions_url, params: { transaction: {
        nature: "income",
        account_id: @transaction.account_id,
        amount: @transaction.amount,
        currency: @transaction.currency,
        date: @transaction.date,
        name: @transaction.name } }
    end

    assert_redirected_to transactions_url
    assert Transaction.order(created_at: :desc).first.amount.negative?, "Amount should be negative"
  end

  test "should show transaction" do
    get transaction_url(@transaction)
    assert_response :success
  end

  test "should update transaction" do
    patch transaction_url(@transaction), params: {
      transaction: {
        account_id: @transaction.account_id,
        amount: @transaction.amount,
        currency: @transaction.currency,
        date: @transaction.date,
        name: @transaction.name
      }
    }

    assert_redirected_to transaction_url(@transaction)
    assert_enqueued_with(job: AccountSyncJob)
  end

  test "should destroy transaction" do
    assert_difference("Transaction.count", -1) do
      delete transaction_url(@transaction)
    end

    assert_redirected_to transactions_url
    assert_enqueued_with(job: AccountSyncJob)
  end
end