From 76c7c773110f4cbd6378f1cf338484edfe6149a0 Mon Sep 17 00:00:00 2001
From: Daniel Cousens <github@dcousens.com>
Date: Wed, 28 Sep 2016 01:05:01 +1000
Subject: [PATCH] tests: add failing test for #633

---
 test/fixtures/transaction_builder.json | 25 ++++++++++++-
 test/transaction_builder.js            | 49 ++++++++++++++++++--------
 2 files changed, 59 insertions(+), 15 deletions(-)

diff --git a/test/fixtures/transaction_builder.json b/test/fixtures/transaction_builder.json
index 37be385..e57608e 100644
--- a/test/fixtures/transaction_builder.json
+++ b/test/fixtures/transaction_builder.json
@@ -633,7 +633,7 @@
       {
         "description": "Incomplete transaction w/ prevTxScript defined",
         "exception": "Not enough signatures provided",
-        "alwaysThrows": true,
+        "incomplete": true,
         "inputs": [
           {
             "txId": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
@@ -658,6 +658,29 @@
           }
         ]
       },
+      {
+        "description": "Duplicate transaction outs",
+        "exception": "Duplicate TxOut: ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff:0",
+        "incomplete": true,
+        "inputs": [
+          {
+            "txId": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+            "vout": 0,
+            "signs": []
+          },
+          {
+            "txId": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+            "vout": 0,
+            "signs": []
+          }
+        ],
+        "outputs": [
+          {
+            "script": "OP_DUP OP_HASH160 aa4d7985c57e011a8b3dd8e0e5a73aaef41629c5 OP_EQUALVERIFY OP_CHECKSIG",
+            "value": 1000
+          }
+        ]
+      },
       {
         "description": "Complete transaction w/ non-standard inputs",
         "exception": "nonstandard not supported",
diff --git a/test/transaction_builder.js b/test/transaction_builder.js
index 53732d4..534f356 100644
--- a/test/transaction_builder.js
+++ b/test/transaction_builder.js
@@ -285,32 +285,53 @@ describe('TransactionBuilder', function () {
       it('builds "' + f.description + '"', function () {
         var txb = construct(f)
         var tx = txb.build()
+
         assert.strictEqual(tx.toHex(), f.txHex)
       })
     })
 
+    // TODO: remove duplicate test code
     fixtures.invalid.build.forEach(function (f) {
       describe('for ' + (f.description || f.exception), function () {
-        var txb
-
-        beforeEach(function () {
-          if (f.txHex) {
-            txb = TransactionBuilder.fromTransaction(Transaction.fromHex(f.txHex))
-          } else {
-            txb = construct(f)
-          }
-        })
-
         it('throws ' + f.exception, function () {
           assert.throws(function () {
+            var txb
+            if (f.txHex) {
+              txb = TransactionBuilder.fromTransaction(Transaction.fromHex(f.txHex))
+            } else {
+              txb = construct(f)
+            }
+
             txb.build()
           }, new RegExp(f.exception))
         })
 
-        if (f.alwaysThrows) return
-        it("doesn't throw if building incomplete", function () {
-          txb.buildIncomplete()
-        })
+        // if throws on incomplete too, enforce that
+        if (f.incomplete) {
+          it('throws ' + f.exception, function () {
+            assert.throws(function () {
+              var txb
+              if (f.txHex) {
+                txb = TransactionBuilder.fromTransaction(Transaction.fromHex(f.txHex))
+              } else {
+                txb = construct(f)
+              }
+
+              txb.buildIncomplete()
+            }, new RegExp(f.exception))
+          })
+        } else {
+          it('does not throw if buildIncomplete', function () {
+            var txb
+            if (f.txHex) {
+              txb = TransactionBuilder.fromTransaction(Transaction.fromHex(f.txHex))
+            } else {
+              txb = construct(f)
+            }
+
+            txb.buildIncomplete()
+          })
+        }
       })
     })
   })