Fix parseAPI not working with non-"namespaces" pathnames. (#450)

* fix parseApi not accepting versions that don't start with 'v'
* add unit tests

Signed-off-by: Sebastian Malton <smalton@mirantis.com>
Co-authored-by: Sebastian Malton <smalton@mirantis.com>

dashboard/client/api/__test__/parseAPI.test.ts

@@ -0,0 +1,58 @@
+import { KubeApi, IKubeApiLinkBase } from "../kube-api";
+
+interface ParseAPITest {
+    url: string;
+    expected: IKubeApiLinkBase;
+}
+
+const tests: ParseAPITest[] = [
+  {
+    url: "/api/v1/namespaces/kube-system/pods/coredns-6955765f44-v8p27",
+    expected: {
+      apiBase: "/api/v1/pods",
+      apiPrefix: "/api",
+      apiGroup: "",
+      apiVersion: "v1",
+      apiVersionWithGroup: "v1",
+      namespace: "kube-system",
+      resource: "pods",
+      name: "coredns-6955765f44-v8p27"
+    },
+  },
+  {
+    url: "/apis/stable.example.com/foo1/crontabs",
+    expected: {
+      apiBase: "/apis/stable.example.com/foo1/crontabs",
+      apiPrefix: "/apis",
+      apiGroup: "stable.example.com",
+      apiVersion: "foo1",
+      apiVersionWithGroup: "stable.example.com/foo1",
+      resource: "crontabs",
+      name: undefined,
+      namespace: undefined,
+    },
+  },
+  {
+    url: "/apis/cluster.k8s.io/v1alpha1/clusters",
+    expected: {
+      apiBase: "/apis/cluster.k8s.io/v1alpha1/clusters",
+      apiPrefix: "/apis",
+      apiGroup: "cluster.k8s.io",
+      apiVersion: "v1alpha1",
+      apiVersionWithGroup: "cluster.k8s.io/v1alpha1",
+      resource: "clusters",
+      name: undefined,
+      namespace: undefined,
+    },
+  },
+];
+
+jest.mock('../kube-watch-api.ts', () => 'KubeWatchApi');
+describe("parseAPI unit tests", () => {
+  for (const i in tests) {
+    const { url: tUrl, expected:tExpect} = tests[i];
+    test(`test #${parseInt(i)+1}`, () => {
+      expect(KubeApi.parseApi(tUrl)).toStrictEqual(tExpect);
+    });
+  }
+});