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https://github.com/openfaas/faas.git
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d85d5e7239
* Add service target metric * Add service min replicas metric * Add scale type metric These combined allow new auto-scaling modes and parameters for OpenFaaS Pro customers. Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
package metrics
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import (
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"encoding/json"
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"log"
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"net/http"
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"net/http/httptest"
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"testing"
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types "github.com/openfaas/faas-provider/types"
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)
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type FakePrometheusQueryFetcher struct {
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}
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func (q FakePrometheusQueryFetcher) Fetch(query string) (*VectorQueryResponse, error) {
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val := []byte(`{"status":"success","data":{"resultType":"vector","result":[{"metric":{"code":"200","function_name":"func_echoit.openfaas-fn"},"value":[1509267827.752,"1"]}]}}`)
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queryRes := VectorQueryResponse{}
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err := json.Unmarshal(val, &queryRes)
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return &queryRes, err
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}
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func makeFakePrometheusQueryFetcher() FakePrometheusQueryFetcher {
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return FakePrometheusQueryFetcher{}
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}
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func Test_PrometheusMetrics_MixedInto_Services(t *testing.T) {
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functionsHandler := makeFunctionsHandler()
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fakeQuery := makeFakePrometheusQueryFetcher()
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handler := AddMetricsHandler(functionsHandler, fakeQuery)
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rr := httptest.NewRecorder()
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request, _ := http.NewRequest(http.MethodGet, "/system/functions", nil)
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handler.ServeHTTP(rr, request)
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if status := rr.Code; status != http.StatusOK {
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t.Errorf("handler returned wrong status code: got %v want %v", status, http.StatusOK)
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}
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if rr.Header().Get("Content-Type") != "application/json" {
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t.Errorf("Want application/json content-type, got: %s", rr.Header().Get("Content-Type"))
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}
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body := rr.Body.String()
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if len(body) == 0 {
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t.Errorf("Want content-length > 0, got: %d", len(rr.Body.String()))
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}
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results := []types.FunctionStatus{}
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json.Unmarshal([]byte(rr.Body.String()), &results)
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if len(results) == 0 {
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t.Errorf("Want %d function, got: %d", 1, len(results))
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}
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if results[0].InvocationCount != 1 {
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t.Errorf("InvocationCount want: %d , got: %f", 1, results[0].InvocationCount)
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}
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}
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func Test_FunctionsHandler_ReturnsJSONAndOneFunction(t *testing.T) {
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functionsHandler := makeFunctionsHandler()
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rr := httptest.NewRecorder()
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request, err := http.NewRequest(http.MethodGet, "/system/functions", nil)
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if err != nil {
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t.Fatal(err)
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}
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functionsHandler.ServeHTTP(rr, request)
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if status := rr.Code; status != http.StatusOK {
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t.Errorf("handler returned wrong status code: got %v want %v", status, http.StatusOK)
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}
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if rr.Header().Get("Content-Type") != "application/json" {
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t.Errorf("Want application/json content-type, got: %s", rr.Header().Get("Content-Type"))
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}
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if len(rr.Body.String()) == 0 {
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t.Errorf("Want content-length > 0, got: %d", len(rr.Body.String()))
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}
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}
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func makeFunctionsHandler() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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functions := []types.FunctionStatus{
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{
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Name: "func_echoit",
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Replicas: 0,
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Namespace: "openfaas-fn",
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},
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}
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bytesOut, marshalErr := json.Marshal(&functions)
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if marshalErr != nil {
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log.Fatal(marshalErr.Error())
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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_, err := w.Write(bytesOut)
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if err != nil {
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log.Fatal(err)
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}
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}
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}
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