Introducing logging

Author: Gonzalo Diaz

Cargo.lock

@@ -11,3 +11,4 @@ crate-type = ["rlib", "cdylib"]
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 once_cell = "1.21.3"
+log = "0.4.28"

Cargo.toml

@@ -12,12 +12,12 @@
 ## (1) ## Allowed values: info | warn | error | debug
 LOG_LEVEL ?= info
 ## (3) (4)
-LOG_LEVEL :=$(shell echo '${LOG_LEVEL}'| tr '[:lower:]' '[:upper:]'| tr -d '[:blank:]')
+LOG_LEVEL :=$(shell echo '${LOG_LEVEL}'| tr '[:upper:]' '[:lower:]'| tr -d '[:blank:]')
 
 ## (1) ## Allowed values: true | false
 BRUTEFORCE ?= false
 ## (3) (4)
-BRUTEFORCE :=$(shell echo '${BRUTEFORCE}'| tr '[:lower:]' '[:upper:]'| tr -d '[:blank:]')
+BRUTEFORCE :=$(shell echo '${BRUTEFORCE}'| tr '[:upper:]' '[:lower:]'| tr -d '[:blank:]')
 
 # DOCKER
 DOCKER_COMPOSE=docker compose
@@ -83,7 +83,7 @@ format:
 	$(PACKAGE_MANAGER) fix --allow-dirty --allow-staged --all-features
 
 test: env dependencies
-	$(PACKAGE_MANAGER) test
+	RUST_LOG=${LOG_LEVEL} $(PACKAGE_MANAGER) test -- --nocapture
 
 coverage: test
 	$(PACKAGE_MANAGER) llvm-cov --all-features --workspace --lcov --output-path lcov.info

Makefile

@@ -1,5 +1,11 @@
 // @link Problem definition [[docs/hackerrank/warmup/mini_max_sum.md]]
 
+#[cfg(not(test))]
+use log::{info}; // Use log crate when building application
+
+#[cfg(test)]
+use std::{println as info}; // Workaround to use prinltn! for logs.
+
 pub fn mini_max_sum(arr: &[i32]) -> String {
   if arr.is_empty() {
     panic!("Empty input");
@@ -28,7 +34,10 @@ pub fn mini_max_sum(arr: &[i32]) -> String {
   result
 }
 
-#[allow(non_snake_case)]
+#[allow(non_snake_case, reason = "Keeping original interface from HackerRank")]
 pub fn miniMaxSum(arr: &[i32]) {
-  print!("{}", mini_max_sum(arr))
+  let result = mini_max_sum(arr);
+
+  info!("miniMaxSum result => {}" , result);
+  println!("{}", mini_max_sum(arr))
 }

src/hackerrank/warmup/mini_max_sum.rs

@@ -4,6 +4,7 @@ use serde::Deserialize;
 
 use crate::common;
 use common::utils::load_json;
+use log::{warn};
 
 #[cfg(test)]
 mod tests {
@@ -26,7 +27,9 @@ mod tests {
     for test_case in TEST_DATA.iter() {
       let slice: &[i32] = &test_case.input;
       let result = mini_max_sum(slice);
-      miniMaxSum(slice);
+      // miniMaxSum(slice);
+
+      warn!("miniMaxSum ({}) result => {}" , test_case.title, result);
 
       assert_eq!(result, test_case.expected);
     }