From 5e82baf476ae08663fc010b6992cf9af09b64308 Mon Sep 17 00:00:00 2001
From: "Owain G. Ainsworth" <oga@conformal.com>
Date: Wed, 19 Jun 2013 00:38:57 +0100
Subject: [PATCH] add some basic tests for stack.PopInt()

---
 stack_test.go | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 64 insertions(+), 1 deletion(-)

diff --git a/stack_test.go b/stack_test.go
index cfdf97a3..54ae5110 100644
--- a/stack_test.go
+++ b/stack_test.go
@@ -170,7 +170,70 @@ var stackTests = []stackTest{
 		btcscript.StackErrUnderflow,
 		[][]byte{},
 	},
-	// XXX test popInt -> byte format matters here.
+	{
+		"popInt 0",
+		[][]byte{{0x0}},
+		func(stack *btcscript.Stack) error {
+			v, err := stack.PopInt()
+			if err != nil {
+				return err
+			}
+			if v.Sign() != 0 {
+				return errors.New("0 != 0 on popInt")
+			}
+			return nil
+		},
+		nil,
+		[][]byte{},
+	},
+	{
+		"popInt -0",
+		[][]byte{{0x80}},
+		func(stack *btcscript.Stack) error {
+			v, err := stack.PopInt()
+			if err != nil {
+				return err
+			}
+			if v.Sign() != 0 {
+				return errors.New("-0 != 0 on popInt")
+			}
+			return nil
+		},
+		nil,
+		[][]byte{},
+	},
+	{
+		"popInt 1",
+		[][]byte{{0x01}},
+		func(stack *btcscript.Stack) error {
+			v, err := stack.PopInt()
+			if err != nil {
+				return err
+			}
+			if v.Cmp(big.NewInt(1)) != 0 {
+				return errors.New("1 != 1 on popInt")
+			}
+			return nil
+		},
+		nil,
+		[][]byte{},
+	},
+	{
+		"popInt 1 leading 0",
+		[][]byte{{0x00000001}},
+		func(stack *btcscript.Stack) error {
+			v, err := stack.PopInt()
+			if err != nil {
+				return err
+			}
+			if v.Cmp(big.NewInt(1)) != 0 {
+				return errors.New("1 != 1 on popInt")
+			}
+			return nil
+		},
+		nil,
+		[][]byte{},
+	},
 	{
 		"dup",
 		[][]byte{{1}},