fix(barchart): print value when value width equal bar width

till now if the value or the label is equal the available width, then
it will be ignored. Modify the condition to less or equal.

Signed-off-by: Ben Fekih, Hichem <hichem.f@live.de>

src/widgets/barchart.rs

@@ -1136,7 +1136,7 @@ mod tests {
     }
 
     #[test]
-    fn test_group_label_right() {
+    fn test_value_label_equal_bar_width() {
         let chart: BarChart<'_> = BarChart::default().data(
             BarGroup::default()
                 .label(Line::from(Span::from("G")).alignment(Alignment::Right))
@@ -1149,4 +1149,26 @@ mod tests {
         let expected = Buffer::with_lines(vec!["  █", "▆ █", "  G"]);
         assert_buffer_eq!(buffer, expected);
     }
+
+    #[test]
+    fn test_value_width_equal_bar_width() {
+        let group = BarGroup::default().bars(&[
+            Bar::default().value(123).label("B1".into()),
+            Bar::default().value(321).label("B2".into()),
+            Bar::default().value(333).label("B2".into()),
+        ]);
+        let chart = BarChart::default().data(group).bar_width(3).bar_gap(1);
+
+        let mut buffer = Buffer::empty(Rect::new(0, 0, 11, 5));
+        chart.render(buffer.area, &mut buffer);
+
+        let expected = Buffer::with_lines(vec![
+            "    ▆▆▆ ███",
+            "    ███ ███",
+            "▃▃▃ ███ ███",
+            "123 321 333",
+            "B1  B2  B2 ",
+        ]);
+        assert_buffer_eq!(buffer, expected);
+    }
 }

src/widgets/barchart/bar.rs

@@ -155,7 +155,7 @@ impl<'a> Bar<'a> {
             };
 
             let width = value_label.len() as u16;
-            if width < max_width {
+            if width <= max_width {
                 buf.set_string(
                     x + (max_width.saturating_sub(value_label.len() as u16) >> 1),
                     y,