added config tests

processor/starlarktransform/config_test.go

@@ -0,0 +1,66 @@
+package starlarktransform
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestConfig(t *testing.T) {
+	testscript := "def transform(event):\n    json.decode(event)\n    return event"
+	mockHTTPServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, testscript)
+	}))
+
+	testcases := []struct {
+		name          string
+		config        Config
+		expected      string
+		expectedErr   error
+		validationErr error
+	}{
+		{
+			name: "with file path",
+			config: Config{
+				Script: "./testdata/test.star",
+			},
+			expected: testscript,
+		},
+		{
+			name: "with http url",
+			config: Config{
+				Script: mockHTTPServer.URL,
+			},
+			expected: testscript,
+		},
+		{
+			name:          "empty script and code",
+			config:        Config{},
+			validationErr: errors.New("a value must be given for altest one, [code] or [script]"),
+		},
+	}
+
+	for _, tc := range testcases {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.config.validate()
+			require.Equal(t, tc.validationErr, err)
+			if err != nil {
+				return
+			}
+
+			code, err := tc.config.GetCode()
+			require.Equal(t, tc.expectedErr, err)
+			if err != nil {
+				return
+			}
+
+			assert.Equal(t, tc.expected, code)
+		})
+	}
+
+}