Function TestOLCEncodingRoundTrip

lib/bulk_test.go:595–711

TestOLCEncodingRoundTrip tests that OLC values round-trip correctly through encoding/decoding

(t *testing.T)

// TestOLCEncodingRoundTrip tests that OLC values round-trip correctly through encoding/decoding
func TestOLCEncodingRoundTrip(t *testing.T) {
	// Test location: Blues Inc headquarters in Boston (approximately)
	testLat := 42.3601
	testLon := -71.0589
	testOLC := golc.Encode(testLat, testLon, 12)

	tests := []struct {
		name             string
		templateField    string
		expectedMaxError float64 // in meters
	}{
		{
			name:             "OLC8 - Full 8-byte precision",
			templateField:    "_loc8",
			expectedMaxError: 0.1, // Perfect
		},
		{
			name:             "OLC7 - 7-byte precision (12 chars)",
			templateField:    "_loc7",
			expectedMaxError: 2, // ~1.7m measured
		},
		{
			name:             "OLC6 - 6-byte precision (10 chars)",
			templateField:    "_loc6",
			expectedMaxError: 20, // ~18m measured
		},
		{
			name:             "OLC5 - 5-byte precision (8 chars, coarse grid only)",
			templateField:    "_loc5",
			expectedMaxError: 130, // ~128m measured
		},
		{
			name:             "OLC4 - 4-byte precision (7 chars, truncated coarse)",
			templateField:    "_loc4",
			expectedMaxError: 1500, // ~1226m measured
		},
	}

	for _, tt := range tests {
		ctx := context.Background()
		t.Run(tt.name, func(t *testing.T) {
			// Create template with the OLC field (use FlexNano to avoid compression)
			templateBody := BulkBody{
				NoteFormat:   BulkNoteFormatFlexNano,
				NoteTemplate: fmt.Sprintf(`{"%s": 18, "data": 14}`, tt.templateField),
			}
			templateJSON, err := note.JSONMarshal(templateBody)
			require.NoError(t, err)

			// Create test data
			testData := map[string]interface{}{
				"data": 42,
			}

			// Encode with OLC
			encodeCtx, err := BulkEncodeTemplate(templateJSON)
			require.NoError(t, err)