From 9baf46f1cb10746fce0e29bb31ac8783ca87e12f Mon Sep 17 00:00:00 2001
From: Gareth Kirwan <gbjkirwan@gmail.com>
Date: Fri, 22 Nov 2024 15:13:30 +0700
Subject: [PATCH] Assets: Fix LinearContracts support

---
 exchanges/asset/asset.go      | 15 ++++--
 exchanges/asset/asset_test.go | 86 ++++-------------------------------
 2 files changed, 20 insertions(+), 81 deletions(-)

diff --git a/exchanges/asset/asset.go b/exchanges/asset/asset.go
index e229dffeab6..873da987cf2 100644
--- a/exchanges/asset/asset.go
+++ b/exchanges/asset/asset.go
@@ -20,10 +20,10 @@ type Item uint32
 // Items stores a list of assets types
 type Items []Item
 
-// Const vars for asset package
+// Supported Assets
 const (
 	Empty Item = 0
-	Spot  Item = 1 << iota
+	Spot  Item = 1 << (iota - 1)
 	Margin
 	CrossMargin
 	MarginFunding
@@ -41,9 +41,11 @@ const (
 	Options
 	OptionCombo
 	FutureCombo
-	LinearContract // Added to represent a USDT and USDC based linear derivatives(futures/perpetual) assets in Bybit V5
-	All
+	LinearContract // A USDT or USDC base linear derivatives (futures/perpetual)
+	All            // Must come immediately after all valid assets
+)
 
+const (
 	optionsFlag   = OptionCombo | Options
 	futuresFlag   = PerpetualContract | PerpetualSwap | Futures | DeliveryFutures | UpsideProfitContract | DownsideProfitContract | CoinMarginedFutures | USDTMarginedFutures | USDCMarginedFutures | LinearContract | FutureCombo
 	supportedFlag = Spot | Margin | CrossMargin | MarginFunding | Index | Binary | PerpetualContract | PerpetualSwap | Futures | DeliveryFutures | UpsideProfitContract | DownsideProfitContract | CoinMarginedFutures | USDTMarginedFutures | USDCMarginedFutures | Options | LinearContract | OptionCombo | FutureCombo
@@ -67,6 +69,7 @@ const (
 	options                = "options"
 	optionCombo            = "option_combo"
 	futureCombo            = "future_combo"
+	linearContract         = "linearcontract"
 	all                    = "all"
 )
 
@@ -118,6 +121,8 @@ func (a Item) String() string {
 		return optionCombo
 	case FutureCombo:
 		return futureCombo
+	case LinearContract:
+		return linearContract
 	case All:
 		return all
 	default:
@@ -224,6 +229,8 @@ func New(input string) (Item, error) {
 		return OptionCombo, nil
 	case futureCombo:
 		return FutureCombo, nil
+	case linearContract:
+		return LinearContract, nil
 	case all:
 		return All, nil
 	default:
diff --git a/exchanges/asset/asset_test.go b/exchanges/asset/asset_test.go
index 2e8ba1a0577..73a1ae5a5e9 100644
--- a/exchanges/asset/asset_test.go
+++ b/exchanges/asset/asset_test.go
@@ -10,15 +10,10 @@ import (
 
 func TestString(t *testing.T) {
 	t.Parallel()
-	a := Spot
-	if a.String() != "spot" {
-		t.Fatal("TestString returned an unexpected result")
-	}
-
-	a = 0
-	if a.String() != "" {
-		t.Fatal("TestString returned an unexpected result")
+	for a := Item(1); a <= All; a = a << 1 {
+		assert.NotEmptyf(t, a.String(), "%s.String should return non-empty", a)
 	}
+	assert.Empty(t, Empty.String(), "Empty.String should return empty")
 }
 
 func TestStrings(t *testing.T) {
@@ -90,8 +85,9 @@ func TestNew(t *testing.T) {
 		{Input: "Options", Expected: Options},
 		{Input: "Option", Expected: Options},
 		{Input: "Future", Error: ErrNotSupported},
-		{Input: "future_combo", Expected: FutureCombo},
 		{Input: "option_combo", Expected: OptionCombo},
+		{Input: "future_combo", Expected: FutureCombo},
+		{Input: "linearContract", Expected: LinearContract},
 	}
 
 	for _, tt := range cases {
@@ -123,75 +119,11 @@ func TestSupported(t *testing.T) {
 
 func TestIsFutures(t *testing.T) {
 	t.Parallel()
-	type scenario struct {
-		item      Item
-		isFutures bool
-	}
-	scenarios := []scenario{
-		{
-			item:      Spot,
-			isFutures: false,
-		},
-		{
-			item:      Margin,
-			isFutures: false,
-		},
-		{
-			item:      MarginFunding,
-			isFutures: false,
-		},
-		{
-			item:      Index,
-			isFutures: false,
-		},
-		{
-			item:      Binary,
-			isFutures: false,
-		},
-		{
-			item:      PerpetualContract,
-			isFutures: true,
-		},
-		{
-			item:      PerpetualSwap,
-			isFutures: true,
-		},
-		{
-			item:      Futures,
-			isFutures: true,
-		},
-		{
-			item:      UpsideProfitContract,
-			isFutures: true,
-		},
-		{
-			item:      DownsideProfitContract,
-			isFutures: true,
-		},
-		{
-			item:      CoinMarginedFutures,
-			isFutures: true,
-		},
-		{
-			item:      USDTMarginedFutures,
-			isFutures: true,
-		},
-		{
-			item:      USDCMarginedFutures,
-			isFutures: true,
-		}, {
-			item:      FutureCombo,
-			isFutures: true,
-		},
+	for _, a := range []Item{Spot, Margin, MarginFunding, Index, Binary} {
+		assert.Falsef(t, a.IsFutures(), "%s should return correctly for IsFutures")
 	}
-	for _, s := range scenarios {
-		testScenario := s
-		t.Run(testScenario.item.String(), func(t *testing.T) {
-			t.Parallel()
-			if testScenario.item.IsFutures() != testScenario.isFutures {
-				t.Errorf("expected %v isFutures to be %v", testScenario.item, testScenario.isFutures)
-			}
-		})
+	for _, a := range []Item{PerpetualContract, PerpetualSwap, Futures, UpsideProfitContract, DownsideProfitContract, CoinMarginedFutures, USDTMarginedFutures, USDCMarginedFutures, FutureCombo} {
+		assert.Truef(t, a.IsFutures(), "%s should return correctly for IsFutures")
 	}
 }