exchanges: Limit mock test JSON data size by truncating slices and maps (#1968)

* set limiter to first level mock data list and updated unit tests

* address nested slices length limit

* minor fix recording file and update unit tests

* minor updates on unit tests

* re-record mock files and minor fix on the unit tests ti adapt the mock data change

* improve http recording limit value and fix issues with mock data in binance

* added MockDataSliceLimit in request items and resolve minor unit test issues

* resolve missed conflict

* rename mock variables, resolve unit test issues, and other updates

* minor fix to CheckJSON and update unit tests

* minor unit test fix

* further optimization on mock CheckJSON method, unit tests, and re-record poloniex

* common and recording unit tests fix

* minor linter issues fix

* unit tests format fix

* fix miscellaneous error

* unit tests fix and minor docs update

* re-record and reduce mock file size

* indentation fix

* minor assertion test fix

* reverted log.Printf line in live testing

* rename variables

* update NewVCRServer unit test

* replace string comparison with *net.OpError check

* restructur net error test

* exchanges/mock: Remove redundant error assertion message in TestNewVCRServer

---------

Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>

exchanges/bithumb/bithumb.go

@@ -533,12 +533,13 @@ func (e *Exchange) SendHTTPRequest(ctx context.Context, ep exchange.URL, path st
 		return err
 	}
 	item := &request.Item{
-		Method:        http.MethodGet,
-		Path:          endpoint + path,
-		Result:        result,
-		Verbose:       e.Verbose,
-		HTTPDebugging: e.HTTPDebugging,
-		HTTPRecording: e.HTTPRecording,
+		Method:                 http.MethodGet,
+		Path:                   endpoint + path,
+		Result:                 result,
+		Verbose:                e.Verbose,
+		HTTPDebugging:          e.HTTPDebugging,
+		HTTPRecording:          e.HTTPRecording,
+		HTTPMockDataSliceLimit: e.HTTPMockDataSliceLimit,
 	}
 	return e.SendPayload(ctx, request.Unset, func() (*request.Item, error) {
 		return item, nil
@@ -581,15 +582,16 @@ func (e *Exchange) SendAuthenticatedHTTPRequest(ctx context.Context, ep exchange
 		headers["Content-Type"] = "application/x-www-form-urlencoded"
 
 		return &request.Item{
-			Method:        http.MethodPost,
-			Path:          endpoint + path,
-			Headers:       headers,
-			Body:          bytes.NewBufferString(payload),
-			Result:        &intermediary,
-			NonceEnabled:  true,
-			Verbose:       e.Verbose,
-			HTTPDebugging: e.HTTPDebugging,
-			HTTPRecording: e.HTTPRecording,
+			Method:                 http.MethodPost,
+			Path:                   endpoint + path,
+			Headers:                headers,
+			Body:                   bytes.NewBufferString(payload),
+			Result:                 &intermediary,
+			NonceEnabled:           true,
+			Verbose:                e.Verbose,
+			HTTPDebugging:          e.HTTPDebugging,
+			HTTPRecording:          e.HTTPRecording,
+			HTTPMockDataSliceLimit: e.HTTPMockDataSliceLimit,
 		}, nil
 	}, request.AuthenticatedRequest)
 	if err != nil {