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Maybe/test/models/exchange_rate_test.rb

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require "test_helper"
2024-05-02 10:18:06 -04:00
require "ostruct"
class ExchangeRateTest < ActiveSupport::TestCase
include ProviderTestHelper
setup do
@provider = mock
ExchangeRate.stubs(:provider).returns(@provider)
end
test "finds rate in DB" do
existing_rate = exchange_rates(:one)
@provider.expects(:fetch_exchange_rate).never
assert_equal existing_rate, ExchangeRate.find_or_fetch_rate(
from: existing_rate.from_currency,
to: existing_rate.to_currency,
date: existing_rate.date
)
end
test "fetches rate from provider without cache" do
ExchangeRate.delete_all
provider_response = provider_success_response(
ExchangeRate::Provideable::FetchRateData.new(
rate: ExchangeRate.new(
from_currency: "USD",
to_currency: "EUR",
date: Date.current,
rate: 1.2
)
)
)
@provider.expects(:fetch_exchange_rate).returns(provider_response)
assert_no_difference "ExchangeRate.count" do
assert_equal 1.2, ExchangeRate.find_or_fetch_rate(from: "USD", to: "EUR", date: Date.current, cache: false).rate
end
end
test "fetches rate from provider with cache" do
ExchangeRate.delete_all
provider_response = provider_success_response(
ExchangeRate::Provideable::FetchRateData.new(
rate: ExchangeRate.new(
from_currency: "USD",
to_currency: "EUR",
date: Date.current,
rate: 1.2
)
)
)
@provider.expects(:fetch_exchange_rate).returns(provider_response)
assert_difference "ExchangeRate.count", 1 do
assert_equal 1.2, ExchangeRate.find_or_fetch_rate(from: "USD", to: "EUR", date: Date.current, cache: true).rate
end
end
test "returns nil on provider error" do
provider_response = provider_error_response(Provider::ProviderError.new("Test error"))
@provider.expects(:fetch_exchange_rate).returns(provider_response)
assert_nil ExchangeRate.find_or_fetch_rate(from: "USD", to: "EUR", date: Date.current, cache: true)
end
test "upserts rates for currency pair and date range" do
ExchangeRate.delete_all
ExchangeRate.create!(date: 1.day.ago.to_date, from_currency: "USD", to_currency: "EUR", rate: 0.9)
provider_response = provider_success_response(
ExchangeRate::Provideable::FetchRatesData.new(
rates: [
ExchangeRate.new(from_currency: "USD", to_currency: "EUR", date: Date.current, rate: 1.3),
ExchangeRate.new(from_currency: "USD", to_currency: "EUR", date: 1.day.ago.to_date, rate: 1.4),
ExchangeRate.new(from_currency: "USD", to_currency: "EUR", date: 2.days.ago.to_date, rate: 1.5)
]
)
)
@provider.expects(:fetch_exchange_rates)
.with(from: "USD", to: "EUR", start_date: 2.days.ago.to_date, end_date: Date.current)
.returns(provider_response)
ExchangeRate.sync_provider_rates(from: "USD", to: "EUR", start_date: 2.days.ago.to_date)
assert_equal 1.3, ExchangeRate.find_by(from_currency: "USD", to_currency: "EUR", date: Date.current).rate
assert_equal 1.4, ExchangeRate.find_by(from_currency: "USD", to_currency: "EUR", date: 1.day.ago.to_date).rate
assert_equal 1.5, ExchangeRate.find_by(from_currency: "USD", to_currency: "EUR", date: 2.days.ago.to_date).rate
end
end