add some unit tests for pkg/api (#4994)

Signed-off-by: qiuming520 <qiuming_yewu@cmss.chinamobile.com>

pkg/api/metering/v1alpha1/types_test.go

@@ -0,0 +1,51 @@
+package v1alpha1
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/emicklei/go-restful"
+	"github.com/stretchr/testify/assert"
+
+	"kubesphere.io/kubesphere/pkg/simple/client/monitoring"
+)
+
+func TestParseQueryParameter(t *testing.T) {
+	queryParam := "level=LevelCluster&operation=query&time=1559347600&start=1559347200&end=1561939200&step=10m&sort_metric=meter_workspace_cpu_usage&sort_type=desc&page=1&limit=5&metrics_filter=meter_workspace_cpu_usage|meter_workspace_memory_usage&resources_filter=cpu&workspace=my-ws&namespace=my-ns&node=my-node&kind=deployment&workload=my-wl&pod=my-pod&applications=nignx&services=my-svc&storageclass=nfs&pvc_filter=my-pvc&cluster=my-cluster"
+	req, err := http.NewRequest("GET", fmt.Sprintf("http://localhost/tenant.kubesphere.io/v2alpha1/metering?%s", queryParam), nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expected := Query{
+		Level:            monitoring.Level(1),
+		Operation:        "query",
+		LabelSelector:    "",
+		Time:             "1559347600",
+		Start:            "1559347200",
+		End:              "1561939200",
+		Step:             "10m",
+		Target:           "meter_workspace_cpu_usage",
+		Order:            "desc",
+		Page:             "1",
+		Limit:            "5",
+		MetricFilter:     "meter_workspace_cpu_usage|meter_workspace_memory_usage",
+		ResourceFilter:   "cpu",
+		NodeName:         "my-node",
+		WorkspaceName:    "my-ws",
+		NamespaceName:    "my-ns",
+		WorkloadKind:     "deployment",
+		WorkloadName:     "my-wl",
+		PodName:          "my-pod",
+		Applications:     "nignx",
+		Services:         "my-svc",
+		StorageClassName: "nfs",
+		PVCFilter:        "my-pvc",
+		Cluster:          "my-cluster",
+	}
+
+	request := restful.NewRequest(req)
+	actual := ParseQueryParameter(request)
+	assert.Equal(t, &expected, actual)
+}