test: add unit tests

handlers/instances_test.go

@@ -0,0 +1,40 @@
+package handlers
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/sirupsen/logrus"
+)
+
+func TestInstancesList(t *testing.T) {
+	r, err := http.NewRequest(http.MethodGet, "/instances.json", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rr := httptest.NewRecorder()
+	l := logrus.New()
+
+	m := New(l)
+	m.ServeHTTP(rr, r)
+
+	c := rr.Result().Header.Get("content-type")
+	if c != ContentTypeJSON {
+		t.Fatalf("expected %q, got %q", ContentTypeJSON, c)
+	}
+
+	defer rr.Result().Body.Close()
+
+	d := json.NewDecoder(rr.Result().Body)
+	instances := []map[string]any{}
+	if err := d.Decode(&instances); err != nil {
+		t.Fatalf("unable to decode json from response, %q\n", err)
+	}
+
+	if _, exists := instances[0]["clearnet"]; !exists {
+		t.Fatal("unable to get clearnet value from instances list")
+	}
+}