Initial Commit

packages/geospatial/geo/universe/src/observer/observer.test.ts

@@ -0,0 +1,103 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import type {
+    AtmosphericObserver,
+    ObserverPosition,
+    SpaceObserver,
+    SurfaceObserver,
+} from "./observer.js";
+
+describe("Observer types", () => {
+    it("surface observer has kind surface", { timeout: 5000 }, () => {
+        const o: SurfaceObserver = {
+            kind: "surface",
+            planet: {
+                name: "Earth",
+                mass: 1,
+                radius: 1,
+                polarRadius: 1,
+                surfaceGravity: 1,
+                rotationPeriod: 1,
+                axialTilt: 0,
+                atmosphere: null,
+                satellites: [],
+            },
+            coord: { latitude: 0, longitude: 0 },
+        };
+        expect(o.kind).toBe("surface");
+    });
+
+    it("atmospheric observer has kind atmospheric", { timeout: 5000 }, () => {
+        const o: AtmosphericObserver = {
+            kind: "atmospheric",
+            planet: {
+                name: "Earth",
+                mass: 1,
+                radius: 1,
+                polarRadius: 1,
+                surfaceGravity: 1,
+                rotationPeriod: 1,
+                axialTilt: 0,
+                atmosphere: null,
+                satellites: [],
+            },
+            coord: { latitude: 0, longitude: 0 },
+            altitudeMetres: 100,
+        };
+        expect(o.kind).toBe("atmospheric");
+    });
+
+    it("space observer has kind space", { timeout: 5000 }, () => {
+        const o: SpaceObserver = {
+            kind: "space",
+            heliocentricVec: { x: 0, y: 0, z: 0 },
+            frame: "icrs",
+        };
+        expect(o.kind).toBe("space");
+    });
+
+    it("discriminated union narrows correctly", { timeout: 5000 }, () => {
+        const observers: ObserverPosition[] = [
+            {
+                kind: "surface",
+                planet: {
+                    name: "Earth",
+                    mass: 1,
+                    radius: 1,
+                    polarRadius: 1,
+                    surfaceGravity: 1,
+                    rotationPeriod: 1,
+                    axialTilt: 0,
+                    atmosphere: null,
+                    satellites: [],
+                },
+                coord: { latitude: 0, longitude: 0 },
+            },
+            {
+                kind: "atmospheric",
+                planet: {
+                    name: "Earth",
+                    mass: 1,
+                    radius: 1,
+                    polarRadius: 1,
+                    surfaceGravity: 1,
+                    rotationPeriod: 1,
+                    axialTilt: 0,
+                    atmosphere: null,
+                    satellites: [],
+                },
+                coord: { latitude: 0, longitude: 0 },
+                altitudeMetres: 100,
+            },
+            {
+                kind: "space",
+                heliocentricVec: { x: 1, y: 0, z: 0 },
+                frame: "icrs",
+            },
+        ];
+        expect(observers.filter((o) => o.kind === "surface")).toHaveLength(1);
+        expect(observers.filter((o) => o.kind === "atmospheric")).toHaveLength(
+            1
+        );
+        expect(observers.filter((o) => o.kind === "space")).toHaveLength(1);
+    });
+});