[test] #111 : Send multiple amounts

* add transaction_amount() unittest

tests/test_unit_tx.py

 import pytest
-from silkaj.tx import truncBase, transaction_confirmation
+from silkaj.tx import truncBase, transaction_confirmation, transaction_amount
 from silkaj.tui import display_pubkey, display_amount
 from silkaj.money import UDValue
 from silkaj.constants import G1_SYMBOL
@@ -184,3 +184,85 @@ async def test_transaction_confirmation(
         comment,
     )
     assert tx == expected
+
+
+# transaction_amount()
+@pytest.mark.parametrize(
+    "amount, amountUD, outputAddresses, expected",
+    [
+        ("10", None, ["DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw"], ([1000], 1000)),
+        (
+            "10:2.367",
+            None,
+            [
+                "DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw",
+                "4szFkvQ5tzzhwcfUtZD32hdoG2ZzhvG3ZtfR61yjnxdw",
+            ],
+            ([1000, 237], 1237),
+        ),
+        (
+            "10",
+            None,
+            [
+                "DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw",
+                "4szFkvQ5tzzhwcfUtZD32hdoG2ZzhvG3ZtfR61yjnxdw",
+            ],
+            ([1000], 2000),
+        ),
+        (None, "1.263", ["DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw"], ([397], 397)),
+        (
+            None,
+            "0.5:10",
+            [
+                "DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw",
+                "4szFkvQ5tzzhwcfUtZD32hdoG2ZzhvG3ZtfR61yjnxdw",
+            ],
+            ([157, 3140], 3297),
+        ),
+        (
+            None,
+            "0.5",
+            [
+                "DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw",
+                "4szFkvQ5tzzhwcfUtZD32hdoG2ZzhvG3ZtfR61yjnxdw",
+            ],
+            ([157], 314),
+        ),
+        (
+            "10:56",
+            None,
+            ["DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw"],
+            "Error : The number of passed recipients (--output) is not the same as the passed amounts (--amount).",
+        ),
+        (
+            None,
+            "1:45",
+            "DBM6F5ChMJzpmkUdL5zD9UXKExmZGfQ1AgPDQy4MxSBw",
+            "Error : The number of passed recipients (--output) is not the same as the passed amounts (--amount).",
+        ),
+    ],
+)
+@pytest.mark.asyncio
+async def test_transaction_amount(
+    amount, amountUD, outputAddresses, expected, capsys, monkeypatch
+):
+    # patched functions
+    monkeypatch.setattr("silkaj.money.UDValue.get_ud_value", patched.ud_value)
+
+    if amount:
+        amount_given = amount
+    if amountUD:
+        amount_given = amountUD
+    # test errors
+    if len(amount_given.split(":")) != 1 and len(outputAddresses) != len(
+        amount_given.split(":")
+    ):
+        # check program exit on error
+        with pytest.raises(SystemExit) as pytest_exit:
+            # read output to check error.
+            await transaction_amount(amount, amountUD, outputAddresses)
+            assert expected == capsys.readouterr()
+        assert pytest_exit.type == SystemExit
+    # test good values
+    else:
+        assert expected == await transaction_amount(amount, amountUD, outputAddresses)