Add test for Profiler::get_statistics, and remove empty space around …

…Profiler::get_statistics.

Profiler::get_statistics calculates mean, median, min, and max for a given vector of data. This commit adds a test for the calculated statistics.

components/profile/time.rs

@@ -327,8 +327,7 @@ impl Profiler {
         true
     }
 
-
-    fn get_statistics(data: &[f64]) -> (f64, f64, f64, f64) {
+    pub fn get_statistics(data: &[f64]) -> (f64, f64, f64, f64) {
          let data_len = data.len();
          let (mean, median, min, max) =
              (data.iter().sum::<f64>() / (data_len as f64),
@@ -338,7 +337,6 @@ impl Profiler {
         (mean, median, min, max)
     }
 
-
     fn print_buckets(&mut self) {
         match self.output {
             Some(OutputOptions::FileName(ref filename)) => {

tests/unit/profile/time.rs

@@ -15,3 +15,24 @@ fn time_profiler_smoke_test() {
     chan.send(ProfilerMsg::Exit(ipcchan));
     assert!(true, "Can tell the profiler thread to exit");
 }
+
+#[test]
+fn time_profilers_stats_test() {
+    let even_data = vec![1.234, 3.24567, 3.54578, 5.0, 5.324, 7.345, \
+                         9.2345, 10.2342345, 13.2599, 15.0];
+    let (even_mean, even_median, even_min, even_max) = time::Profiler::get_statistics(&even_data);
+
+    assert_eq!(7.34230845, even_mean);
+    assert_eq!(7.345, even_median);
+    assert_eq!(1.234, even_min);
+    assert_eq!(15.0, even_max);
+
+    let odd_data = vec![1.234, 3.24567, 3.54578, 5.0, 5.324, 7.345, \
+                        9.2345, 10.2342345, 13.2599];
+    let (odd_mean, odd_median, odd_min, odd_max) = time::Profiler::get_statistics(&odd_data);
+
+    assert_eq!(6.491453833333334, odd_mean);
+    assert_eq!(5.324, odd_median);
+    assert_eq!(1.234, odd_min);
+    assert_eq!(13.2599, odd_max);
+}