From a0a34377782bd316fedbb070808666fdb562ab38 Mon Sep 17 00:00:00 2001
From: new0ne <on@satellite.local>
Date: Sun, 29 Oct 2023 10:34:09 +0200
Subject: [PATCH] add alternative marshal test

---
 consensus/alt_marshal_test.go | 87 +++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 consensus/alt_marshal_test.go

diff --git a/consensus/alt_marshal_test.go b/consensus/alt_marshal_test.go
new file mode 100644
index 00000000..6383a638
--- /dev/null
+++ b/consensus/alt_marshal_test.go
@@ -0,0 +1,87 @@
+package consensus_test
+
+import (
+    "testing"
+    "math/big"
+
+    "go.sia.tech/core/consensus"
+)
+
+// Constants for test cases and error messages.
+const (
+    testBigIntValue        = 12345
+    errMsgNegativeValue    = "value cannot be negative"
+    errMsgValueOverflows   = "value overflows Work representation"
+    maxBigIntString        = "115792089237316195423570985008687907853269984665640564039457584007913129639936" // 2^256 - 1
+    invalidByteSliceString = "invalid"
+)
+
+func TestWorkMarshalText(t *testing.T) {
+    var work consensus.Work
+    testValue := big.NewInt(testBigIntValue)
+
+    // Initialization of Work object using UnmarshalText
+    if err := work.UnmarshalText([]byte(testValue.String())); err != nil {
+        t.Fatalf("failed to unmarshal text: %v", err)
+    }
+
+    // Testing MarshalText
+    got, err := work.MarshalText()
+    if err != nil {
+        t.Fatalf("expected nil error, got %v", err)
+    }
+
+    expected, err := testValue.MarshalText()
+    if err != nil {
+        t.Fatalf("unexpected error: %v", err)
+    }
+
+    if string(got) != string(expected) {
+        t.Errorf("expected %s, got %s", expected, got)
+    }
+}
+
+func TestWorkUnmarshalText(t *testing.T) {
+    var work consensus.Work
+
+    // Case 1: Valid byte slice
+    if err := work.UnmarshalText([]byte(big.NewInt(testBigIntValue).String())); err != nil {
+        t.Fatalf("expected nil error, got %v", err)
+    }
+
+    // Case 2: Negative value
+    if err := work.UnmarshalText([]byte(big.NewInt(-testBigIntValue).String())); err == nil || err.Error() != errMsgNegativeValue {
+        t.Fatalf("expected error: %s, got: %v", errMsgNegativeValue, err)
+    }
+
+    // Case 3: Overflow value
+    if err := work.UnmarshalText([]byte(maxBigIntString)); err == nil || err.Error() != errMsgValueOverflows {
+        t.Fatalf("expected error: %s, got: %v", errMsgValueOverflows, err)
+    }
+
+    // Case 4: Invalid byte slice
+    if err := work.UnmarshalText([]byte(invalidByteSliceString)); err == nil {
+        t.Fatal("expected an error, got nil")
+    }
+}
+
+func TestWorkJSONSerialization(t *testing.T) {
+    var work consensus.Work
+    if err := work.UnmarshalText([]byte("11")); err != nil {
+        t.Fatalf("failed to unmarshal text: %v", err)
+    }
+
+    jsonData, err := work.MarshalJSON()
+    if err != nil {
+        t.Fatalf("failed to marshal JSON: %v", err)
+    }
+
+    var work2 consensus.Work
+    if err := work2.UnmarshalJSON(jsonData); err != nil {
+        t.Fatalf("failed to unmarshal JSON: %v", err)
+    }
+
+    if work.String() != work2.String() {
+        t.Errorf("expected %v, got %v", work, work2)
+    }
+}
\ No newline at end of file