1 files changed, 23 insertions, 6 deletions
diff --git a/src/test/util/setup_common.h b/src/test/util/setup_common.h
index 78b279e42a..a09c8c122d 100644
--- a/src/test/util/setup_common.h
+++ b/src/test/util/setup_common.h
@@ -102,15 +102,16 @@ class CBlock;
 struct CMutableTransaction;
 class CScript;
 
-//
-// Testing fixture that pre-creates a
-// 100-block REGTEST-mode block chain
-//
+/**
+ * Testing fixture that pre-creates a 100-block REGTEST-mode block chain
+ */
 struct TestChain100Setup : public RegTestingSetup {
     TestChain100Setup();
 
-    // Create a new block with just given transactions, coinbase paying to
-    // scriptPubKey, and try to add it to the current chain.
+    /**
+     * Create a new block with just given transactions, coinbase paying to
+     * scriptPubKey, and try to add it to the current chain.
+     */
     CBlock CreateAndProcessBlock(const std::vector<CMutableTransaction>& txns,
                                  const CScript& scriptPubKey);
 
@@ -152,4 +153,20 @@ CBlock getBlock13b8a();
 // define an implicit conversion here so that uint256 may be used directly in BOOST_CHECK_*
 std::ostream& operator<<(std::ostream& os, const uint256& num);
 
+/**
+ * BOOST_CHECK_EXCEPTION predicates to check the specific validation error.
+ * Use as
+ * BOOST_CHECK_EXCEPTION(code that throws, exception type, HasReason("foo"));
+ */
+class HasReason {
+public:
+    explicit HasReason(const std::string& reason) : m_reason(reason) {}
+    template <typename E>
+    bool operator() (const E& e) const {
+        return std::string(e.what()).find(m_reason) != std::string::npos;
+    };
+private:
+    const std::string m_reason;
+};
+
 #endif