kojiapi: add simple test for the /status API

Add a simple unit test for the koji API.

This adds a Handler() method to the koji.Server struct, which made
writing the test easier. This is a direction we want to go in anyway in
the future.

internal/kojiapi/server_test.go

@@ -0,0 +1,53 @@
+package kojiapi_test
+
+import (
+	"encoding/json"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/osbuild/osbuild-composer/internal/jobqueue/testjobqueue"
+	"github.com/osbuild/osbuild-composer/internal/kojiapi"
+	"github.com/osbuild/osbuild-composer/internal/kojiapi/api"
+	distro_mock "github.com/osbuild/osbuild-composer/internal/mocks/distro"
+	rpmmd_mock "github.com/osbuild/osbuild-composer/internal/mocks/rpmmd"
+	"github.com/osbuild/osbuild-composer/internal/upload/koji"
+	"github.com/osbuild/osbuild-composer/internal/worker"
+	"github.com/stretchr/testify/require"
+)
+
+func newTestKojiServer(t *testing.T) *kojiapi.Server {
+	rpm_fixture := rpmmd_mock.BaseFixture()
+	rpm := rpmmd_mock.NewRPMMDMock(rpm_fixture)
+	require.NotNil(t, rpm)
+
+	distros, err := distro_mock.NewDefaultRegistry()
+	require.NoError(t, err)
+	require.NotNil(t, distros)
+
+	workers := worker.NewServer(nil, testjobqueue.New(), "")
+	require.NotNil(t, workers)
+
+	server := kojiapi.NewServer(nil, workers, rpm, distros, map[string]koji.GSSAPICredentials{})
+	require.NotNil(t, server)
+
+	return server
+}
+
+func TestStatus(t *testing.T) {
+	server := newTestKojiServer(t)
+	handler := server.Handler()
+
+	req := httptest.NewRequest("GET", "/api/composer-koji/v1/status", nil)
+	req.Header.Set("Content-Type", "application/json")
+
+	rec := httptest.NewRecorder()
+	handler.ServeHTTP(rec, req)
+	resp := rec.Result()
+
+	require.Equal(t, 200, resp.StatusCode)
+
+	var status api.Status
+	err := json.NewDecoder(resp.Body).Decode(&status)
+	require.NoError(t, err)
+	require.Equal(t, "OK", status.Status)
+}