[QA] add testcases for parsing strings as values

qa/rpc-tests/wallet.py

@@ -380,5 +380,37 @@ class WalletTest (BitcoinTestFramework):
         assert_equal(Decimal(self.nodes[2].getbalance()), node2balance)
         assert_equal(Decimal(self.nodes[2].getbalance("*")), node2balance)
 
+        #send a tx with value in a string (PR#6380 +)
+        txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "2")
+        txObj = self.nodes[0].gettransaction(txId)
+        assert_equal(txObj['amount'], Decimal('-2.00000000'))
+
+        txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "0.0001")
+        txObj = self.nodes[0].gettransaction(txId)
+        assert_equal(txObj['amount'], Decimal('-0.00010000'))
+
+        #check if JSON parser can handle scientific notation in strings
+        txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "1e-4")
+        txObj = self.nodes[0].gettransaction(txId)
+        assert_equal(txObj['amount'], Decimal('-0.00010000'))
+
+        #this should fail
+        errorString = ""
+        try:
+            txId  = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "1f-4")
+        except JSONRPCException,e:
+            errorString = e.error['message']
+
+        assert_equal("Invalid amount" in errorString, True);
+
+        errorString = ""
+        try:
+            self.nodes[0].generate("2") #use a string to as block amount parameter must fail because it's not interpreted as amount
+        except JSONRPCException,e:
+            errorString = e.error['message']
+
+        assert_equal("not an integer" in errorString, True);
+
+
 if __name__ == '__main__':
     WalletTest ().main ()