Integration tests for basic CRD queries

19 files changed, 645 insertions, 0 deletions

diff --git a/backend/core/tests/common/fakes/account.rs b/backend/core/tests/common/fakes/account.rs
new file mode 100644
index 0000000..e915aed
--- /dev/null
+++ b/backend/core/tests/common/fakes/account.rs
@@ -0,0 +1,10 @@
+use budgeting_app_core::models::{account::Account, date_time_utc::DateTimeUtc};
+
+pub fn make_fake_account(id: i32) -> Account {
+    Account {
+        id,
+        name: String::from("Joe Bloggs"),
+        opening_balance: 0,
+        opening_date: DateTimeUtc::now(),
+    }
+}
diff --git a/backend/core/tests/common/fakes/budget_update.rs b/backend/core/tests/common/fakes/budget_update.rs
new file mode 100644
index 0000000..e7ee9b9
--- /dev/null
+++ b/backend/core/tests/common/fakes/budget_update.rs
@@ -0,0 +1,16 @@
+use budgeting_app_core::models::{budget_update::{BudgetUpdate, BudgetUpdateBuilder}, date_time_utc::DateTimeUtc};
+
+pub fn make_fake_budget_update(id: i32) -> BudgetUpdate {
+    make_fake_budget_update_builder(id).build().unwrap()
+}
+
+pub fn make_fake_budget_update_builder(id: i32) ->  BudgetUpdateBuilder {
+    let mut builder = BudgetUpdateBuilder::default();
+    builder
+        .id(id)
+        .category_id(0)
+        .date(DateTimeUtc::now())
+        .new_budget(0)
+        .new_period(0);
+    builder
+}
diff --git a/backend/core/tests/common/fakes/category.rs b/backend/core/tests/common/fakes/category.rs
new file mode 100644
index 0000000..27a027e
--- /dev/null
+++ b/backend/core/tests/common/fakes/category.rs
@@ -0,0 +1,13 @@
+use budgeting_app_core::models::category::{Category, CategoryBuilder};
+
+pub fn make_fake_category(id: i32) -> Category {
+    make_fake_category_builder(id).build().unwrap()
+}
+
+pub fn make_fake_category_builder(id: i32) ->  CategoryBuilder {
+    let mut builder = CategoryBuilder::default();
+    builder
+        .id(id)
+        .name(String::from("Fake category"));
+    builder
+}
diff --git a/backend/core/tests/common/fakes/category_transfer.rs b/backend/core/tests/common/fakes/category_transfer.rs
new file mode 100644
index 0000000..66496f3
--- /dev/null
+++ b/backend/core/tests/common/fakes/category_transfer.rs
@@ -0,0 +1,16 @@
+use budgeting_app_core::models::category_transfer::{CategoryTransfer, CategoryTransferBuilder};
+
+pub fn make_fake_category_transfer(id: i32) -> CategoryTransfer {
+    make_fake_category_transfer_builder(id).build().unwrap()
+}
+
+pub fn make_fake_category_transfer_builder(id: i32) ->  CategoryTransferBuilder {
+    let mut builder = CategoryTransferBuilder::default();
+    builder
+        .id(id)
+        .description(String::from("Fake category transfer"))
+        .quantity(0)
+        .from_category_id(0)
+        .to_category_id(1);
+    builder
+}
diff --git a/backend/core/tests/common/fakes/mod.rs b/backend/core/tests/common/fakes/mod.rs
new file mode 100644
index 0000000..68f5209
--- /dev/null
+++ b/backend/core/tests/common/fakes/mod.rs
@@ -0,0 +1,6 @@
+pub mod account;
+pub mod budget_update;
+pub mod category;
+pub mod category_transfer;
+pub mod transaction;
+pub mod transaction_categorisation;
diff --git a/backend/core/tests/common/fakes/transaction.rs b/backend/core/tests/common/fakes/transaction.rs
new file mode 100644
index 0000000..d113ce5
--- /dev/null
+++ b/backend/core/tests/common/fakes/transaction.rs
@@ -0,0 +1,17 @@
+use budgeting_app_core::models::{date_time_utc::DateTimeUtc, transaction::{Transaction, TransactionBuilder}};
+
+pub fn make_fake_transaction(id: i32) -> Transaction {
+    make_fake_transaction_builder(id).build().unwrap()
+}
+
+pub fn make_fake_transaction_builder(id: i32) ->  TransactionBuilder {
+    let mut builder = TransactionBuilder::default();
+    builder
+        .id(id)
+        .description(String::from("Fake category transfer"))
+        .payee(String::from("Fake payee"))
+        .quantity(0)
+        .date(DateTimeUtc::now())
+        .account_id(0);
+    builder
+}
diff --git a/backend/core/tests/common/fakes/transaction_categorisation.rs b/backend/core/tests/common/fakes/transaction_categorisation.rs
new file mode 100644
index 0000000..9ddd684
--- /dev/null
+++ b/backend/core/tests/common/fakes/transaction_categorisation.rs
@@ -0,0 +1,16 @@
+use budgeting_app_core::models::transaction_categorisation::{TransactionCategorisation, TransactionCategorisationBuilder};
+
+pub fn make_fake_transaction_categorisation(id: i32) -> TransactionCategorisation {
+    make_fake_transaction_categorisation_builder(id).build().unwrap()
+}
+
+pub fn make_fake_transaction_categorisation_builder(id: i32) ->  TransactionCategorisationBuilder {
+    let mut builder = TransactionCategorisationBuilder::default();
+    builder
+        .id(id)
+        .description(String::from("Fake category transfer"))
+        .quantity(0)
+        .transaction_id(0)
+        .category_id(0);
+    builder
+}
diff --git a/backend/core/tests/common/mod.rs b/backend/core/tests/common/mod.rs
new file mode 100644
index 0000000..6681d3d
--- /dev/null
+++ b/backend/core/tests/common/mod.rs
@@ -0,0 +1,2 @@
+pub mod fakes;
+pub mod test_context;
diff --git a/backend/core/tests/common/test_context.rs b/backend/core/tests/common/test_context.rs
new file mode 100644
index 0000000..f6142b0
--- /dev/null
+++ b/backend/core/tests/common/test_context.rs
@@ -0,0 +1,43 @@
+use std::sync::atomic::{AtomicU64, Ordering};
+
+use budgeting_app_core::{queries::clear::clear, MIGRATIONS};
+use diesel::{Connection, SqliteConnection};
+use diesel_migrations::MigrationHarness;
+
+pub struct TestContext {
+    pub db_url: String,
+}
+
+static ID_COUNTER: AtomicU64 = AtomicU64::new(0);
+
+impl TestContext {
+    pub fn new() -> Self {
+        let db_url = Self::next_id() + ".sqlite";
+
+        let connection = &mut SqliteConnection
+            ::establish(&db_url)
+            .expect("failed to connect to database");
+
+        connection
+            .run_pending_migrations(MIGRATIONS)
+            .expect("failed to run migrations");
+
+        clear(connection)
+            .expect("failed to clear database");
+
+        Self {
+            db_url,
+        }
+    }
+
+    fn next_id() -> String {
+        ID_COUNTER.fetch_add(1, Ordering::Relaxed).to_string()
+    }
+}
+
+impl Drop for TestContext {
+    fn drop(&mut self) {
+        std::fs::remove_file(&self.db_url)
+            .expect(format!("failed to delete database {}", self.db_url).as_str());
+    }
+}
diff --git a/backend/core/tests/main.rs b/backend/core/tests/main.rs
new file mode 100644
index 0000000..27409b6
--- /dev/null
+++ b/backend/core/tests/main.rs
@@ -0,0 +1,4 @@
+pub mod common;
+
+mod models;
+mod queries;
diff --git a/backend/core/tests/models/date_time_utc.rs b/backend/core/tests/models/date_time_utc.rs
new file mode 100644
index 0000000..1f86968
--- /dev/null
+++ b/backend/core/tests/models/date_time_utc.rs
@@ -0,0 +1,59 @@
+use anyhow::Result;
+use budgeting_app_core::models::date_time_utc::DateTimeUtc;
+use diesel::{sql_query, Connection, ExpressionMethods, QueryDsl, RunQueryDsl, Selectable, SelectableHelper, SqliteConnection};
+use diesel::prelude::{Insertable, Queryable};
+
+use crate::common::test_context::TestContext;
+
+diesel::table! {
+    date_time_utc_test (id) {
+        id -> Integer,
+        date_time_utc -> Text,
+    }
+}
+
+#[derive(Insertable, Queryable, Selectable, Clone)]
+#[diesel(table_name = date_time_utc_test)]
+pub struct DateTimeUtcTest {
+    pub id: i32,
+    pub date_time_utc: DateTimeUtc,
+}
+
+fn new_test_context() -> Result<TestContext> {
+    let test_context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&test_context.db_url)?;
+    let query = "CREATE TABLE date_time_utc_test(id INTEGER PRIMARY KEY, date_time_utc TEXT);";
+    sql_query(query).execute(connection)?;
+    Ok(test_context)
+}
+
+fn insert_date_time_utc(id: i32, date_time_utc: &DateTimeUtc, connection: &mut SqliteConnection) -> Result<usize> {
+    let model = DateTimeUtcTest {
+        id,
+        date_time_utc: date_time_utc.clone(),
+    };
+    let num_rows_inserted = diesel::insert_into(date_time_utc_test::dsl::date_time_utc_test)
+        .values(&[model])
+        .execute(connection)?;
+    Ok(num_rows_inserted)
+}
+
+fn get_date_time_utc(id: i32, connection: &mut SqliteConnection) -> Result<DateTimeUtcTest> {
+    let date_time_utc: Vec<DateTimeUtcTest> = date_time_utc_test::dsl::date_time_utc_test
+        .select(DateTimeUtcTest::as_select())
+        .filter(date_time_utc_test::id.eq(id))
+        .load(connection)?;
+    Ok(date_time_utc[0].clone())
+}
+
+#[test]
+fn when_insert_date_time_utc_and_select_then_returns_original_value() -> Result<()> {
+    let date_time_utc = DateTimeUtc::now();
+    let test_context = new_test_context()?;
+    let connection = &mut SqliteConnection::establish(&test_context.db_url)?;
+    let num_rows_inserted = insert_date_time_utc(0, &date_time_utc, connection)?;
+    assert_eq!(num_rows_inserted, 1);
+    let date_time_utc_returned = get_date_time_utc(0, connection)?;
+    assert_eq!(date_time_utc_returned.date_time_utc.to_date_str(), date_time_utc.to_date_str());
+    Ok(())
+}
diff --git a/backend/core/tests/models/mod.rs b/backend/core/tests/models/mod.rs
new file mode 100644
index 0000000..5837dcd
--- /dev/null
+++ b/backend/core/tests/models/mod.rs
@@ -0,0 +1 @@
+mod date_time_utc;
diff --git a/backend/core/tests/queries/account.rs b/backend/core/tests/queries/account.rs
new file mode 100644
index 0000000..4fd9e99
--- /dev/null
+++ b/backend/core/tests/queries/account.rs
@@ -0,0 +1,58 @@
+use budgeting_app_core::queries;
+use diesel::{Connection, SqliteConnection};
+
+use crate::common::{fakes::account::make_fake_account, test_context::TestContext};
+
+#[test]
+fn when_insert_accounts_then_returns_num_accounts() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0), make_fake_account(1)];
+
+    let num_accounts_inserted = queries::accounts::insert_accounts(&accounts, connection).unwrap();
+
+    assert_eq!(num_accounts_inserted, 2);
+}
+
+#[test]
+fn given_accounts_when_get_all_accounts_then_return_accounts() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0), make_fake_account(1)];
+    let _ = queries::accounts::insert_accounts(&accounts, connection).unwrap();
+
+    let accounts_in_db = queries::accounts::get_all_accounts(connection).unwrap();
+
+    assert_eq!(accounts_in_db.len(), accounts.len());
+    for account in &accounts {
+        assert!(accounts_in_db.iter().any(|account_in_db| account_in_db.eq(&account)));
+    }
+    for account_in_db in accounts_in_db {
+        assert!(accounts.iter().any(|account| account.eq(&account_in_db)));
+    }
+}
+
+#[test]
+fn given_accounts_when_delete_all_accounts_then_return_num_of_accounts() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0), make_fake_account(1)];
+    let _ = queries::accounts::insert_accounts(&accounts, connection).unwrap();
+
+    let num_accounts_deleted = queries::accounts::delete_all_accounts(connection).unwrap();
+
+    assert_eq!(num_accounts_deleted, accounts.len());
+}
+
+#[test]
+fn given_deleted_accounts_when_get_all_accounts_then_return_empty() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0), make_fake_account(1)];
+    let _ = queries::accounts::insert_accounts(&accounts, connection).unwrap();
+    let _ = queries::accounts::delete_all_accounts(connection).unwrap();
+
+    let accounts_returned = queries::accounts::get_all_accounts(connection).unwrap();
+
+    assert_eq!(accounts_returned.len(), 0);
+}
diff --git a/backend/core/tests/queries/budget_updates.rs b/backend/core/tests/queries/budget_updates.rs
new file mode 100644
index 0000000..147d06f
--- /dev/null
+++ b/backend/core/tests/queries/budget_updates.rs
@@ -0,0 +1,78 @@
+use budgeting_app_core::queries;
+use diesel::{Connection, SqliteConnection};
+
+use crate::common::{fakes::{budget_update::make_fake_budget_update_builder, category::make_fake_category}, test_context::TestContext};
+
+#[test]
+fn when_insert_budget_updates_then_returns_num_budget_updates() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0)];
+    let budget_updates = [
+        make_fake_budget_update_builder(0).category_id(0).build().unwrap(),
+        make_fake_budget_update_builder(1).category_id(0).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+
+    let num_budget_updates_inserted = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();
+
+    assert_eq!(num_budget_updates_inserted, 2);
+}
+
+#[test]
+fn given_budget_updates_when_get_all_budget_updates_then_return_budget_updates() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0)];
+    let budget_updates = [
+        make_fake_budget_update_builder(0).category_id(0).build().unwrap(),
+        make_fake_budget_update_builder(1).category_id(0).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();
+
+    let budget_updates_in_db = queries::budget_updates::get_all_budget_updates(connection).unwrap();
+
+    assert_eq!(budget_updates_in_db.len(), budget_updates.len());
+    for budget_update in &budget_updates {
+        assert!(budget_updates_in_db.iter().any(|budget_update_in_db| budget_update_in_db.eq(&budget_update)));
+    }
+    for budget_update_in_db in budget_updates_in_db {
+        assert!(budget_updates.iter().any(|budget_update| budget_update.eq(&budget_update_in_db)));
+    }
+}
+
+#[test]
+fn given_budget_updates_when_delete_all_budget_updates_then_return_num_of_budget_updates() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0)];
+    let budget_updates = [
+        make_fake_budget_update_builder(0).category_id(0).build().unwrap(),
+        make_fake_budget_update_builder(1).category_id(0).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();
+
+    let num_budget_updates_deleted = queries::budget_updates::delete_all_budget_updates(connection).unwrap();
+
+    assert_eq!(num_budget_updates_deleted, budget_updates.len());
+}
+
+#[test]
+fn given_deleted_budget_updates_when_get_all_budget_updates_then_return_empty() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0)];
+    let budget_updates = [
+        make_fake_budget_update_builder(0).category_id(0).build().unwrap(),
+        make_fake_budget_update_builder(1).category_id(0).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();
+    let _ = queries::budget_updates::delete_all_budget_updates(connection).unwrap();
+
+    let budget_updates_returned = queries::budget_updates::get_all_budget_updates(connection).unwrap();
+
+    assert_eq!(budget_updates_returned.len(), 0);
+}
diff --git a/backend/core/tests/queries/categories.rs b/backend/core/tests/queries/categories.rs
new file mode 100644
index 0000000..917536e
--- /dev/null
+++ b/backend/core/tests/queries/categories.rs
@@ -0,0 +1,58 @@
+use budgeting_app_core::queries;
+use diesel::{Connection, SqliteConnection};
+
+use crate::common::{fakes::category::make_fake_category, test_context::TestContext};
+
+#[test]
+fn when_insert_categories_then_returns_num_categories() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+
+    let num_categories_inserted = queries::categories::insert_categories(&categories, connection).unwrap();
+
+    assert_eq!(num_categories_inserted, 2);
+}
+
+#[test]
+fn given_categories_when_get_all_categories_then_return_categories() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+    let _ = queries::categories::insert_categories(&categories, connection).unwrap();
+
+    let categories_in_db = queries::categories::get_all_categories(connection).unwrap();
+
+    assert_eq!(categories_in_db.len(), categories.len());
+    for category in &categories {
+        assert!(categories_in_db.iter().any(|category_in_db| category_in_db.eq(&category)));
+    }
+    for category_in_db in categories_in_db {
+        assert!(categories.iter().any(|category| category.eq(&category_in_db)));
+    }
+}
+
+#[test]
+fn given_categories_when_delete_all_categories_then_return_num_of_categories() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+    let _ = queries::categories::insert_categories(&categories, connection).unwrap();
+
+    let num_categories_deleted = queries::categories::delete_all_categories(connection).unwrap();
+
+    assert_eq!(num_categories_deleted, categories.len());
+}
+
+#[test]
+fn given_deleted_categories_when_get_all_categories_then_return_empty() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+    let _ = queries::categories::insert_categories(&categories, connection).unwrap();
+    let _ = queries::categories::delete_all_categories(connection).unwrap();
+
+    let categories_returned = queries::categories::get_all_categories(connection).unwrap();
+
+    assert_eq!(categories_returned.len(), 0);
+}
diff --git a/backend/core/tests/queries/category_transfers.rs b/backend/core/tests/queries/category_transfers.rs
new file mode 100644
index 0000000..d329d9c
--- /dev/null
+++ b/backend/core/tests/queries/category_transfers.rs
@@ -0,0 +1,78 @@
+use budgeting_app_core::queries;
+use diesel::{Connection, SqliteConnection};
+
+use crate::common::{fakes::{category::make_fake_category, category_transfer::make_fake_category_transfer_builder}, test_context::TestContext};
+
+#[test]
+fn when_insert_category_transfers_then_returns_num_category_transfers() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+    let category_transfers = [
+        make_fake_category_transfer_builder(0).from_category_id(0).to_category_id(1).build().unwrap(),
+        make_fake_category_transfer_builder(1).from_category_id(0).to_category_id(1).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+
+    let num_category_transfers_inserted = queries::category_transfers::insert_category_transfers(&category_transfers, connection).unwrap();
+
+    assert_eq!(num_category_transfers_inserted, 2);
+}
+
+#[test]
+fn given_category_transfers_when_get_all_category_transfers_then_return_category_transfers() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+    let category_transfers = [
+        make_fake_category_transfer_builder(0).from_category_id(0).to_category_id(1).build().unwrap(),
+        make_fake_category_transfer_builder(1).from_category_id(0).to_category_id(1).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+    let _ = queries::category_transfers::insert_category_transfers(&category_transfers, connection).unwrap();
+
+    let category_transfers_in_db = queries::category_transfers::get_all_category_transfers(connection).unwrap();
+
+    assert_eq!(category_transfers_in_db.len(), category_transfers.len());
+    for category_transfer in &category_transfers {
+        assert!(category_transfers_in_db.iter().any(|category_transfer_in_db| category_transfer_in_db.eq(&category_transfer)));
+    }
+    for category_transfer_in_db in category_transfers_in_db {
+        assert!(category_transfers.iter().any(|category_transfer| category_transfer.eq(&category_transfer_in_db)));
+    }
+}
+
+#[test]
+fn given_category_transfers_when_delete_all_category_transfers_then_return_num_of_category_transfers() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+    let category_transfers = [
+        make_fake_category_transfer_builder(0).from_category_id(0).to_category_id(1).build().unwrap(),
+        make_fake_category_transfer_builder(1).from_category_id(0).to_category_id(1).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+    let _ = queries::category_transfers::insert_category_transfers(&category_transfers, connection).unwrap();
+
+    let num_category_transfers_deleted = queries::category_transfers::delete_all_category_transfers(connection).unwrap();
+
+    assert_eq!(num_category_transfers_deleted, category_transfers.len());
+}
+
+#[test]
+fn given_deleted_category_transfers_when_get_all_category_transfers_then_return_empty() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let categories = [make_fake_category(0), make_fake_category(1)];
+    let category_transfers = [
+        make_fake_category_transfer_builder(0).from_category_id(0).to_category_id(1).build().unwrap(),
+        make_fake_category_transfer_builder(1).from_category_id(0).to_category_id(1).build().unwrap(),
+    ];
+    let _ = queries::categories::insert_categories(&categories, connection);
+    let _ = queries::category_transfers::insert_category_transfers(&category_transfers, connection).unwrap();
+    let _ = queries::category_transfers::delete_all_category_transfers(connection).unwrap();
+
+    let category_transfers_returned = queries::category_transfers::get_all_category_transfers(connection).unwrap();
+
+    assert_eq!(category_transfers_returned.len(), 0);
+}
diff --git a/backend/core/tests/queries/mod.rs b/backend/core/tests/queries/mod.rs
new file mode 100644
index 0000000..e421934
--- /dev/null
+++ b/backend/core/tests/queries/mod.rs
@@ -0,0 +1,6 @@
+mod account;
+mod budget_updates;
+mod categories;
+mod category_transfers;
+mod transaction_categorisations;
+mod transactions;
diff --git a/backend/core/tests/queries/transaction_categorisations.rs b/backend/core/tests/queries/transaction_categorisations.rs
new file mode 100644
index 0000000..3c2171d
--- /dev/null
+++ b/backend/core/tests/queries/transaction_categorisations.rs
@@ -0,0 +1,86 @@
+use budgeting_app_core::queries;
+use diesel::{Connection, SqliteConnection};
+
+use crate::common::{fakes::{account::make_fake_account, category::make_fake_category, transaction::make_fake_transaction_builder, transaction_categorisation::make_fake_transaction_categorisation_builder}, test_context::TestContext};
+
+fn insert_prerequisite_data(connection: &mut SqliteConnection) {
+    let accounts = [make_fake_account(0)];
+    let categories = [make_fake_category(0)];
+    let transactions = [
+        make_fake_transaction_builder(0).account_id(0).build().unwrap(),
+        make_fake_transaction_builder(1).account_id(0).build().unwrap(),
+    ];
+    let _ = queries::accounts::insert_accounts(&accounts, connection);
+    let _ = queries::categories::insert_categories(&categories, connection);
+    let _ = queries::transactions::insert_transactions(&transactions, connection);
+}
+
+#[test]
+fn when_insert_transaction_categorisations_then_returns_num_transaction_categorisations() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    insert_prerequisite_data(connection);
+    let transaction_categorisations = [
+        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
+        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
+    ];
+
+    let num_transaction_categorisations_inserted = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection).unwrap();
+
+    assert_eq!(num_transaction_categorisations_inserted, 2);
+}
+
+#[test]
+fn given_transaction_categorisations_when_get_all_transaction_categorisations_then_return_transaction_categorisations() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    insert_prerequisite_data(connection);
+    let transaction_categorisations = [
+        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
+        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
+    ];
+    let _ = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection);
+
+    let transaction_categorisations_in_db = queries::transaction_categorisations::get_all_transaction_categorisations(connection).unwrap();
+
+    assert_eq!(transaction_categorisations_in_db.len(), transaction_categorisations.len());
+    for transaction_categorisation in &transaction_categorisations {
+        assert!(transaction_categorisations_in_db.iter().any(|transaction_categorisation_in_db| transaction_categorisation_in_db.eq(&transaction_categorisation)));
+    }
+    for transaction_categorisation_in_db in transaction_categorisations_in_db {
+        assert!(transaction_categorisations.iter().any(|transaction_categorisation| transaction_categorisation.eq(&transaction_categorisation_in_db)));
+    }
+}
+
+#[test]
+fn given_transaction_categorisations_when_delete_all_transaction_categorisations_then_return_num_of_transaction_categorisations() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    insert_prerequisite_data(connection);
+    let transaction_categorisations = [
+        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
+        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
+    ];
+    let _ = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection);
+
+    let num_transaction_categorisations_deleted = queries::transaction_categorisations::delete_all_transaction_categorisations(connection).unwrap();
+
+    assert_eq!(num_transaction_categorisations_deleted, transaction_categorisations.len());
+}
+
+#[test]
+fn given_deleted_transaction_categorisations_when_get_all_transaction_categorisations_then_return_empty() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    insert_prerequisite_data(connection);
+    let transaction_categorisations = [
+        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
+        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
+    ];
+    let _ = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection);
+    let _ = queries::transaction_categorisations::delete_all_transaction_categorisations(connection);
+
+    let transaction_categorisations_returned = queries::transaction_categorisations::get_all_transaction_categorisations(connection).unwrap();
+
+    assert_eq!(transaction_categorisations_returned.len(), 0);
+}
diff --git a/backend/core/tests/queries/transactions.rs b/backend/core/tests/queries/transactions.rs
new file mode 100644
index 0000000..406f5a8
--- /dev/null
+++ b/backend/core/tests/queries/transactions.rs
@@ -0,0 +1,78 @@
+use budgeting_app_core::queries;
+use diesel::{Connection, SqliteConnection};
+
+use crate::common::{fakes::{account::make_fake_account, transaction::make_fake_transaction_builder}, test_context::TestContext};
+
+#[test]
+fn when_insert_transactions_then_returns_num_transactions() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0)];
+    let transactions = [
+        make_fake_transaction_builder(0).account_id(0).build().unwrap(),
+        make_fake_transaction_builder(1).account_id(0).build().unwrap(),
+    ];
+    let _ = queries::accounts::insert_accounts(&accounts, connection);
+
+    let num_transactions_inserted = queries::transactions::insert_transactions(&transactions, connection).unwrap();
+
+    assert_eq!(num_transactions_inserted, 2);
+}
+
+#[test]
+fn given_transactions_when_get_all_transactions_then_return_transactions() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0)];
+    let transactions = [
+        make_fake_transaction_builder(0).account_id(0).build().unwrap(),
+        make_fake_transaction_builder(1).account_id(0).build().unwrap(),
+    ];
+    let _ = queries::accounts::insert_accounts(&accounts, connection);
+    let _ = queries::transactions::insert_transactions(&transactions, connection).unwrap();
+
+    let transactions_in_db = queries::transactions::get_all_transactions(connection).unwrap();
+
+    assert_eq!(transactions_in_db.len(), transactions.len());
+    for transaction in &transactions {
+        assert!(transactions_in_db.iter().any(|transaction_in_db| transaction_in_db.eq(&transaction)));
+    }
+    for transaction_in_db in transactions_in_db {
+        assert!(transactions.iter().any(|transaction| transaction.eq(&transaction_in_db)));
+    }
+}
+
+#[test]
+fn given_transactions_when_delete_all_transactions_then_return_num_of_transactions() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0)];
+    let transactions = [
+        make_fake_transaction_builder(0).account_id(0).build().unwrap(),
+        make_fake_transaction_builder(1).account_id(0).build().unwrap(),
+    ];
+    let _ = queries::accounts::insert_accounts(&accounts, connection);
+    let _ = queries::transactions::insert_transactions(&transactions, connection).unwrap();
+
+    let num_transactions_deleted = queries::transactions::delete_all_transactions(connection).unwrap();
+
+    assert_eq!(num_transactions_deleted, transactions.len());
+}
+
+#[test]
+fn given_deleted_transactions_when_get_all_transactions_then_return_empty() {
+    let context = TestContext::new();
+    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
+    let accounts = [make_fake_account(0)];
+    let transactions = [
+        make_fake_transaction_builder(0).account_id(0).build().unwrap(),
+        make_fake_transaction_builder(1).account_id(0).build().unwrap(),
+    ];
+    let _ = queries::accounts::insert_accounts(&accounts, connection);
+    let _ = queries::transactions::insert_transactions(&transactions, connection).unwrap();
+    let _ = queries::transactions::delete_all_transactions(connection).unwrap();
+
+    let transactions_returned = queries::transactions::get_all_transactions(connection).unwrap();
+
+    assert_eq!(transactions_returned.len(), 0);
+}