T15 Charts: cartesian with axes, legend, crosshair, tooltip, zoom, annotations and export (T15a); pie, donut, radar, heatmaps, treemap, sunburst, waterfall and spreads (T15b); sankey, funnel, gantt, force graph, chord, parallel coordinates, bullet and progress (T15c)

src/charts/tests.rs

@@ -0,0 +1,29 @@
+use gpui::TestAppContext;
+
+use super::{BarChart, LineChart, Series};
+use crate::theme::Theme;
+
+#[gpui::test]
+fn a_chart_exports_as_svg_and_csv(cx: &mut TestAppContext) {
+    cx.update(|cx| {
+        Theme::init(cx);
+        let line = LineChart::new("sales", ["Jan", "Feb", "Mar"])
+            .series(Series::new("Sales, net", [1.0, 3.0, 2.0]))
+            .smooth();
+        let svg = line.svg(400.0, 200.0, cx);
+        assert!(svg.starts_with("<svg") && svg.ends_with("</svg>"));
+        assert_eq!(svg.matches("<path").count(), 1, "one line, no area");
+        assert!(svg.contains(" C"), "a smooth line curves");
+        assert!(svg.contains(">Feb</text>"), "categories label the axis");
+        assert_eq!(line.csv(), ",Jan,Feb,Mar\n\"Sales, net\",1,3,2");
+        let bars = BarChart::new("share", ["A", "B"])
+            .series(Series::new("Now", [2.0, 4.0]))
+            .series(Series::new("Before", [1.0, 3.0]));
+        let svg = bars.svg(400.0, 200.0, cx);
+        assert_eq!(
+            svg.matches("<rect").count(),
+            5,
+            "the page, then a bar per value"
+        );
+    });
+}