add simple test for string.encode

internal/processing/string-encode_test.go

@@ -0,0 +1,42 @@
+package processing_test
+
+import (
+	"slices"
+	"testing"
+
+	"github.com/jwetzell/showbridge-go/internal/processing"
+)
+
+func TestGoodStringEncode(t *testing.T) {
+	stringEncoder := processing.StringEncode{}
+	tests := []struct {
+		processor processing.Processor
+		name      string
+		payload   any
+		expected  []byte
+	}{
+		{
+			processor: &stringEncoder,
+			name:      "hello",
+			payload:   "hello",
+			expected:  []byte{0x68, 0x65, 0x6c, 0x6c, 0x6f},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := test.processor.Process(t.Context(), test.payload)
+
+			gotBytes, ok := got.([]byte)
+			if !ok {
+				t.Errorf("string.encode returned a %T payload: %s", got, got)
+			}
+			if err != nil {
+				t.Errorf("string.encode failed: %s", err)
+			}
+			if !slices.Equal(gotBytes, test.expected) {
+				t.Errorf("string.encode got %s, expected %s", got, test.expected)
+			}
+		})
+	}
+}