add bytes test cases, update changelog

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - Correctly isolate path and nodeid from test cases inside classes
+- Allow `""` and `"0x"` when converting to bytes, disallow booleans
 
 ## [1.5.0](https://github.com/iamdefinitelyahuman/brownie/tree/v1.5.0) - 2020-01-20
 ### Added

tests/main/convert/test_to_bytes.py

@@ -9,7 +9,7 @@ def test_type_bounds():
     with pytest.raises(ValueError):
         to_bytes("0x00", "bytes0")
     with pytest.raises(ValueError):
-        to_bytes("0x", "bytes33")
+        to_bytes("0x00", "bytes33")
 
 
 def test_length_bounds():
@@ -44,3 +44,22 @@ def test_int_bounds():
         assert to_bytes(2 ** (i * 8) - 1, type_).hex() == "ff" * i
         with pytest.raises(OverflowError):
             to_bytes(2 ** (i * 8), type_)
+
+
+def test_byte_is_bytes1():
+    assert to_bytes(42, "byte") == to_bytes(42, "bytes1")
+
+
+def test_zero_value():
+    assert to_bytes("", "bytes1").hex() == "00"
+    assert to_bytes("0x", "bytes1").hex() == "00"
+    assert to_bytes(0, "bytes1").hex() == "00"
+
+
+def test_invalid_type():
+    with pytest.raises(TypeError):
+        to_bytes(None)
+    with pytest.raises(TypeError):
+        to_bytes(3.1337)
+    with pytest.raises(TypeError):
+        to_bytes(True)