add rust tests

crates/re_types/Cargo.toml

@@ -49,6 +49,7 @@ macaw = { workspace = true, optional = true }
 # External
 glam.workspace = true
 itertools.workspace = true
+similar-asserts = "1.4.2"
 
 
 [build-dependencies]

crates/re_types/tests/points2d.rs

@@ -0,0 +1,50 @@
+use re_types::{archetypes::Points2D, components};
+
+#[test]
+fn roundtrip() {
+    // TODO(cmc): (de)serialization roundtrips
+
+    let arch = Points2D::new([(1.0, 2.0), (3.0, 4.0)])
+        .with_radii([42.0, 43.0])
+        .with_colors([0xAA0000CC, 0x00BB00DD])
+        .with_labels(["hello", "friend"])
+        .with_draw_order(300.0)
+        .with_instance_keys([1, 2, 3])
+        .with_class_ids([126, 127])
+        .with_keypoint_ids([2, 3])
+        .with_instance_keys([u64::MAX - 1, u64::MAX]);
+
+    let expected = Points2D {
+        points: vec![
+            components::Point2D::new(1.0, 2.0), //
+            components::Point2D::new(3.0, 4.0),
+        ],
+        radii: Some(vec![
+            components::Radius(42.0), //
+            components::Radius(43.0),
+        ]),
+        colors: Some(vec![
+            components::Color::from_unmultiplied_rgba(0xAA, 0x00, 0x00, 0xCC), //
+            components::Color::from_unmultiplied_rgba(0x00, 0xBB, 0x00, 0xDD),
+        ]),
+        labels: Some(vec![
+            components::Label("hello".to_owned()),  //
+            components::Label("friend".to_owned()), //
+        ]),
+        draw_order: Some(components::DrawOrder(300.0)),
+        class_ids: Some(vec![
+            components::ClassId(126), //
+            components::ClassId(127), //
+        ]),
+        keypoint_ids: Some(vec![
+            components::KeypointId(2), //
+            components::KeypointId(3), //
+        ]),
+        instance_keys: Some(vec![
+            components::InstanceKey(u64::MAX - 1), //
+            components::InstanceKey(u64::MAX),
+        ]),
+    };
+
+    similar_asserts::assert_eq!(expected, arch);
+}