summaryrefslogtreecommitdiff
path: root/rust/core/src/utils/calculate_budgets_accrual.rs
diff options
context:
space:
mode:
authorJoe Carstairs <me@joeac.net>2024-11-17 09:29:32 +0000
committerJoe Carstairs <me@joeac.net>2024-11-17 09:30:04 +0000
commit10f071447594f2bdcec84a461df9ad648f71f44b (patch)
tree645924a4948f39a4d9e2ec270d79fc6c2a3a937a /rust/core/src/utils/calculate_budgets_accrual.rs
parent1ae19eb3315c40e3f9062592c27fa76c11cf626c (diff)
Renames app to 'schist'
Diffstat (limited to 'rust/core/src/utils/calculate_budgets_accrual.rs')
-rw-r--r--rust/core/src/utils/calculate_budgets_accrual.rs155
1 files changed, 0 insertions, 155 deletions
diff --git a/rust/core/src/utils/calculate_budgets_accrual.rs b/rust/core/src/utils/calculate_budgets_accrual.rs
deleted file mode 100644
index 56171ca..0000000
--- a/rust/core/src/utils/calculate_budgets_accrual.rs
+++ /dev/null
@@ -1,155 +0,0 @@
-use anyhow::Result;
-use crate::{models::{
- budget_update::BudgetUpdate, category::Category, date_utc::DateUtc
-}, traits::nowlike::Nowlike};
-
-pub fn calculate_budgets_accrual(category: &Category, budget_updates: &[BudgetUpdate]) -> Result<i64> {
- let mut budget_updates = budget_updates
- .iter()
- .filter(|bu| bu.category_id == category.id)
- .collect::<Vec<&BudgetUpdate>>();
- budget_updates.sort_by_key(|bu| bu.date.clone());
- budget_updates.reverse();
-
- let mut budgets_accrual = 0.0_f64;
- let mut calculated_back_to_date = DateUtc::now();
-
- for budget_update in budget_updates {
- let days_on_this_budget = calculated_back_to_date.day_diff(&budget_update.date);
- if days_on_this_budget == 0_u32 {
- return Err(anyhow::Error::msg(format!(
- "failed to calculate budgets accrual since two budget updates had the same date ({})",
- budget_update.date,
- )));
- }
- let budget_per_day = budget_update.new_budget as f64 / budget_update.new_period as f64;
- budgets_accrual += days_on_this_budget as f64 * budget_per_day;
- calculated_back_to_date = budget_update.date.clone();
- }
-
- Ok(budgets_accrual.floor() as i64)
-}
-
-#[cfg(test)]
-mod test {
- use chrono::{Days, Utc};
-
- use crate::{
- models::{budget_update::BudgetUpdate, category::Category, date_utc::DateUtc}, traits::nowlike::Nowlike, utils::calculate_budgets_accrual
- };
-
- #[test]
- fn when_no_budget_updates_then_return_zero() {
- let category = Category {
- id: 0,
- name: String::from("Groceries"),
- };
- let budget_updates = [];
-
- let result = calculate_budgets_accrual(&category, &budget_updates);
-
- assert!(result.is_ok());
- assert_eq!(result.unwrap(), 0_i64);
- }
-
- #[test]
- fn when_one_budget_update_for_another_category_then_return_zero() {
- let category = Category {
- id: 0,
- name: String::from("Groceries"),
- };
- let budget_updates = [BudgetUpdate {
- id: 0,
- category_id: 1,
- date: DateUtc::now(),
- new_budget: 100,
- new_period: 1,
- }];
-
- let result = calculate_budgets_accrual(&category, &budget_updates);
-
- assert!(result.is_ok());
- assert_eq!(result.unwrap(), 0_i64);
- }
-
- #[test]
- fn when_one_budget_update_then_return_quantity_times_days_in_past() {
- let category = Category {
- id: 0,
- name: String::from("Groceries"),
- };
- let budget_updates = [BudgetUpdate {
- id: 0,
- category_id: 0,
- date: DateUtc::from(Utc::now().checked_sub_days(Days::new(120)).unwrap()),
- new_budget: 100,
- new_period: 1,
- }];
-
- let result = calculate_budgets_accrual(&category, &budget_updates);
-
- assert!(result.is_ok());
- assert_eq!(result.unwrap(), 12_000);
- }
-
- #[test]
- fn when_two_budget_updates_then_calculates_as_expected() {
- let category = Category {
- id: 0,
- name: String::from("Groceries"),
- };
- let budget_updates = [
- BudgetUpdate {
- id: 0,
- category_id: 0,
- date: DateUtc::from(&Utc::now().checked_sub_days(Days::new(60)).unwrap()),
- new_budget: 200,
- new_period: 1,
- },
- BudgetUpdate {
- id: 0,
- category_id: 0,
- date: DateUtc::from(&Utc::now().checked_sub_days(Days::new(120)).unwrap()),
- new_budget: 100,
- new_period: 1,
- },
- ];
-
- let result = calculate_budgets_accrual(&category, &budget_updates);
-
- assert!(result.is_ok());
- assert_eq!(result.unwrap(), 18_000);
- }
-
- #[test]
- fn when_two_budget_updates_on_same_day_then_returns_err() {
- let category = Category {
- id: 0,
- name: String::from("Groceries"),
- };
- let budget_updates = [
- BudgetUpdate {
- id: 0,
- category_id: 0,
- date: DateUtc::from_ymd(2020, 12, 25).unwrap(),
- new_budget: 200,
- new_period: 1,
- },
- BudgetUpdate {
- id: 0,
- category_id: 0,
- date: DateUtc::from_ymd(2020, 12, 25).unwrap(),
- new_budget: 100,
- new_period: 1,
- },
- ];
- let mut budget_updates_reversed = budget_updates.clone();
- budget_updates_reversed.reverse();
-
- let result_leftways = calculate_budgets_accrual(&category, &budget_updates);
- let result_rightways = calculate_budgets_accrual(&category, &budget_updates_reversed);
-
- assert!(result_leftways.is_err());
- assert!(result_rightways.is_err());
- }
-}