Try to debug Windows test failure

Author: GabrielMajeri

examples/mandelbrot/src/lib.rs

@@ -223,8 +223,10 @@ mod tests {
         let (width, height) = (200, 200);
 
         let dims = (width, height);
+        eprintln!("Generating Mandelbrot fractal");
         let mb = Mandelbrot::generate(dims, algo);
 
+        eprintln!("Outputting B/W image to a buffer");
         let out = {
             let mut out = Vec::with_capacity(width * height);
             mb.output_pbm(&mut out).unwrap();
@@ -233,6 +235,7 @@ mod tests {
 
         assert_eq!(out.len(), OUTPUT.len());
 
+        eprintln!("Comparing output with expected output");
         if out != OUTPUT {
             out.into_iter().zip(OUTPUT.into_iter()).enumerate().for_each(
                 |(i, (a, &b))| {
@@ -253,6 +256,7 @@ mod tests {
 
     #[test]
     fn verify_output_simd() {
+        eprintln!("Running SIMD algorithm test");
         verify_algo(Algorithm::Simd);
     }
 }