feat: Enhance test information output (#3696)

# Description

## Problem\*

Resolves #3686

## Summary\*

Improved the output of tests by including passed/failed count in the
last line print.

## Additional Context



## Documentation\*

Check one:
- [x] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist\*

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

tooling/nargo_cli/src/cli/test_cmd.rs

@@ -82,7 +82,7 @@ pub(crate) fn run(
 fn run_tests<S: BlackBoxFunctionSolver>(
     blackbox_solver: &S,
     package: &Package,
-    test_name: FunctionNameMatch,
+    fn_name: FunctionNameMatch,
     show_output: bool,
     compile_options: &CompileOptions,
 ) -> Result<(), CliError> {
@@ -95,10 +95,27 @@ fn run_tests<S: BlackBoxFunctionSolver>(
         compile_options.silence_warnings,
     )?;
 
-    let test_functions = context.get_all_test_functions_in_crate_matching(&crate_id, test_name);
+    let test_functions = context.get_all_test_functions_in_crate_matching(&crate_id, fn_name);
+    let count_all = test_functions.len();
+    if count_all == 0 {
+        return match &fn_name {
+            FunctionNameMatch::Anything => {
+                Err(CliError::Generic(format!("[{}] Found 0 tests.", package.name)))
+            }
+            FunctionNameMatch::Exact(pattern) => Err(CliError::Generic(format!(
+                "[{}] Found 0 tests matching input '{pattern}'.",
+                package.name
+            ))),
+            FunctionNameMatch::Contains(pattern) => Err(CliError::Generic(format!(
+                "[{}] Found 0 tests containing '{pattern}'.",
+                package.name
+            ))),
+        };
+    }
 
-    println!("[{}] Running {} test functions", package.name, test_functions.len());
-    let mut failing = 0;
+    let plural = if count_all == 1 { "" } else { "s" };
+    println!("[{}] Running {count_all} test function{plural}", package.name);
+    let mut count_failed = 0;
 
     let writer = StandardStream::stderr(ColorChoice::Always);
     let mut writer = writer.lock();
@@ -116,13 +133,10 @@ fn run_tests<S: BlackBoxFunctionSolver>(
                 writeln!(writer, "ok").expect("Failed to write to stdout");
             }
             TestStatus::Fail { message, error_diagnostic } => {
-                let writer = StandardStream::stderr(ColorChoice::Always);
-                let mut writer = writer.lock();
                 writer
                     .set_color(ColorSpec::new().set_fg(Some(Color::Red)))
                     .expect("Failed to set color");
-                writeln!(writer, "{message}").expect("Failed to write to stdout");
-                writer.reset().expect("Failed to reset writer");
+                writeln!(writer, "{message}\n").expect("Failed to write to stdout");
                 if let Some(diag) = error_diagnostic {
                     noirc_errors::reporter::report_all(
                         context.file_manager.as_file_map(),
@@ -131,7 +145,7 @@ fn run_tests<S: BlackBoxFunctionSolver>(
                         compile_options.silence_warnings,
                     );
                 }
-                failing += 1;
+                count_failed += 1;
             }
             TestStatus::CompileError(err) => {
                 noirc_errors::reporter::report_all(
@@ -140,21 +154,37 @@ fn run_tests<S: BlackBoxFunctionSolver>(
                     compile_options.deny_warnings,
                     compile_options.silence_warnings,
                 );
-                failing += 1;
+                count_failed += 1;
             }
         }
         writer.reset().expect("Failed to reset writer");
     }
 
-    if failing == 0 {
-        write!(writer, "[{}] ", package.name).expect("Failed to write to stdout");
+    write!(writer, "[{}] ", package.name).expect("Failed to write to stdout");
+
+    if count_failed == 0 {
         writer.set_color(ColorSpec::new().set_fg(Some(Color::Green))).expect("Failed to set color");
-        writeln!(writer, "All tests passed").expect("Failed to write to stdout");
+        writeln!(writer, "{count_all} test{plural} passed").expect("Failed to write to stdout");
+        writer.reset().expect("Failed to reset writer");
+
+        Ok(())
     } else {
-        let plural = if failing == 1 { "" } else { "s" };
-        return Err(CliError::Generic(format!("[{}] {failing} test{plural} failed", package.name)));
-    }
+        let count_passed = count_all - count_failed;
+        let plural_failed = if count_failed == 1 { "" } else { "s" };
+        let plural_passed = if count_passed == 1 { "" } else { "s" };
+
+        if count_passed != 0 {
+            writer
+                .set_color(ColorSpec::new().set_fg(Some(Color::Green)))
+                .expect("Failed to set color");
+            write!(writer, "{count_passed} test{plural_passed} passed, ",)
+                .expect("Failed to write to stdout");
+        }
+        writer.set_color(ColorSpec::new().set_fg(Some(Color::Red))).expect("Failed to set color");
+        writeln!(writer, "{count_failed} test{plural_failed} failed")
+            .expect("Failed to write to stdout");
+        writer.reset().expect("Failed to reset writer");
 
-    writer.reset().expect("Failed to reset writer");
-    Ok(())
+        Err(CliError::Generic(String::new()))
+    }
 }