feat: define product name exists for category DB port

src/inventory/application/port/output/db/product_name_exists_for_category.rs

@@ -0,0 +1,61 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use mockall::predicate::*;
+use mockall::*;
+
+use crate::inventory::domain::product_aggregate::Product;
+
+use super::errors::*;
+#[cfg(test)]
+#[allow(unused_imports)]
+pub use tests::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait ProductNameExistsForCategoryDBPort: Send + Sync {
+    async fn product_name_exists_for_category(&self, c: &Product) -> InventoryDBResult<bool>;
+}
+
+pub type ProductNameExistsForCategoryDBPortObj =
+    std::sync::Arc<dyn ProductNameExistsForCategoryDBPort>;
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use std::sync::Arc;
+
+    pub fn mock_product_name_exists_for_category_db_port_false(
+        times: Option<usize>,
+    ) -> ProductNameExistsForCategoryDBPortObj {
+        let mut m = MockProductNameExistsForCategoryDBPort::new();
+        if let Some(times) = times {
+            m.expect_product_name_exists_for_category()
+                .times(times)
+                .returning(|_| Ok(false));
+        } else {
+            m.expect_product_name_exists_for_category()
+                .returning(|_| Ok(false));
+        }
+
+        Arc::new(m)
+    }
+
+    pub fn mock_product_name_exists_for_category_db_port_true(
+        times: Option<usize>,
+    ) -> ProductNameExistsForCategoryDBPortObj {
+        let mut m = MockProductNameExistsForCategoryDBPort::new();
+        if let Some(times) = times {
+            m.expect_product_name_exists_for_category()
+                .times(times)
+                .returning(|_| Ok(true));
+        } else {
+            m.expect_product_name_exists_for_category()
+                .returning(|_| Ok(true));
+        }
+
+        Arc::new(m)
+    }
+}