added unit tests

jest.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+    testMatch: [
+        "<rootDir>/src/**/*.test.js",
+    ]
+}

package.json

@@ -32,7 +32,7 @@
   "scripts": {
     "start": "PORT=3006 react-scripts start",
     "build": "react-scripts build",
-    "test": "react-scripts test",
+    "test": "react-scripts test --watchAll --transformIgnorePatterns 'node_modules/(?!wktmap)/'",
     "eject": "react-scripts eject"
   },
   "eslintConfig": {

src/wkt.js

@@ -105,4 +105,4 @@ async function transformInput(input) {
 
 }
 
-export { parseWkt, transformInput, ValueError };
+export { parseWkt, transformInput, ValueError, fetchProj };

src/wkt.test.js

@@ -0,0 +1,25 @@
+import { parseWkt, fetchProj } from "./wkt";
+
+describe("parseWkt", () => {
+    it("parses wkt", () => {
+        const wkt = "POINT (30 10)";
+        const json = parseWkt(wkt);
+        expect(json).toEqual({
+            "type": "Feature",
+            "geometry": {
+                "type": "Point",
+                "coordinates": [30, 10]
+            },
+            "properties": null
+        });
+    });
+});        
+
+describe("fetchProj", () => {
+    it("fetches proj", () => {
+        (async ()  =>{
+            const proj = await fetchProj(4326);
+            expect(proj).toEqual("+title=WGS 84 (long/lat) +proj=longlat +ellps=WGS84 +datum=WGS84 +units=degrees");
+        })();
+    });
+});