Enable testing with vitest (#13)

Resolves #12.

Co-authored-by: Jos de Jong <wjosdejong@gmail.com>
Reviewed-on: #13
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>

src/math5.ts

@@ -0,0 +1,20 @@
+import {assemble} from '@/core/Dispatcher'
+import * as specifications from './all'
+
+const math = assemble(specifications)
+export default math
+
+if (import.meta.vitest) {
+    const {it, expect} = import.meta.vitest
+
+    it('Can type numbers and Complex<T>', () => {
+        expect(math.typeOf(-7.5)).toBe('number')
+        expect(math.typeOf({re:2, im: 0.5})).toBe('Complex<number>')
+        expect(math.typeOf({re: {re: -1, im: 3}, im: {re: 0, im: 2.2}}))
+            .toBe('Complex<Complex<number>>')
+    })
+
+    it("Doesn't have a string type yet", () => {
+        expect(math.typeOf('foo')).toBe('unknown')
+    })
+}