Ensure an empty config file load as an empty dict

src/resconfig/io/json.py

@@ -1,2 +1,15 @@
-from json import dump  # noqa
-from json import load  # noqa
+from json import dump as _dump
+from json import load as _load
+from json.decoder import JSONDecodeError
+
+
+def dump(content, f):
+    return _dump(content, f)
+
+
+def load(f):
+    try:
+        content = _load(f)
+    except JSONDecodeError:
+        content = {}
+    return content

src/resconfig/io/yaml.py

@@ -21,4 +21,5 @@ def _dict_representer(dumper, data):
 
 
 def load(stream, **kwargs):
-    return yaml.load(stream, yaml.FullLoader, **kwargs)
+    content = yaml.load(stream, yaml.FullLoader, **kwargs)
+    return content if content else {}

tests/resconfig/io/bases.py

@@ -0,0 +1,10 @@
+from io import StringIO
+
+
+class BaseTestLoad:
+    module = None
+
+    def test_empty(self):
+        stream = StringIO("")
+        loaded = self.module.load(stream)
+        assert loaded == {}, "Blank file should load as an empty dict"

tests/resconfig/io/test_ini.py

@@ -1,9 +1,10 @@
-import io
+from io import StringIO
 
 import pytest
 
-from resconfig.io.ini import dump
-from resconfig.io.ini import load
+from resconfig.io import ini
+
+from .bases import BaseTestLoad
 
 content = """
 [DEFAULT]
@@ -27,23 +28,24 @@
 
 @pytest.fixture
 def stream():
-    yield io.StringIO(content)
+    yield StringIO(content)
 
 
 @pytest.fixture
 def loaded(stream):
-    yield load(stream)
+    yield ini.load(stream)
 
 
 @pytest.fixture
-def dumped(loaded):
-    stream = io.StringIO()
-    dump(loaded, stream)
+def dumped(loaded, stream):
+    ini.dump(loaded, stream)
     stream.seek(0)
     yield stream.read()
 
 
-class TestLoad:
+class TestLoad(BaseTestLoad):
+    module = ini
+
     def test_default_pass_through(self, loaded):
         assert loaded[r"bitbucket\.org"]["serveraliveinterval"] == "45"
 

tests/resconfig/io/test_json.py

@@ -0,0 +1,80 @@
+from io import StringIO
+
+import pytest
+
+from resconfig.io import json
+
+from .bases import BaseTestLoad
+
+content = """
+{
+  "str": "str",
+  "int": 10,
+  "bool": true,
+  "null": null,
+  "array": [0, 1, 2],
+  "nested": {
+    "str": "mystr",
+    "int": 10
+  }
+}
+"""
+
+
+@pytest.fixture
+def stream():
+    yield StringIO(content)
+
+
+@pytest.fixture
+def loaded(stream):
+    yield json.load(stream)
+
+
+@pytest.fixture
+def dumped(loaded, stream):
+    json.dump(loaded, stream)
+    stream.seek(0)
+    yield stream.read()
+
+
+class TestLoad(BaseTestLoad):
+    module = json
+
+    def test_integer(self, loaded):
+        assert loaded["int"] == 10
+
+    def test_string(self, loaded):
+        assert loaded["str"] == "str"
+
+    def test_bool(self, loaded):
+        assert loaded["bool"] is True
+
+    def test_null(self, loaded):
+        assert loaded["null"] is None
+
+    def test_array(self, loaded):
+        assert loaded["array"] == [0, 1, 2]
+
+    def test_nested(self, loaded):
+        assert loaded["nested"]["int"] == 10
+
+
+class TestDump:
+    def test_string(self, dumped):
+        assert '"str": "str"' in dumped
+
+    def test_integer(self, dumped):
+        assert '"int": 10' in dumped
+
+    def test_bool(self, dumped):
+        assert '"bool": true' in dumped
+
+    def test_null(self, dumped):
+        assert '"null": null' in dumped
+
+    def test_array(self, dumped):
+        assert '"array": [0, 1, 2]' in dumped
+
+    def test_nested(self, dumped):
+        assert '"nested": {' in dumped

tests/resconfig/io/test_toml.py

@@ -1,12 +1,13 @@
-import io
 from datetime import datetime
 from datetime import timedelta
 from datetime import timezone
+from io import StringIO
 
 import pytest
 
-from resconfig.io.toml import dump
-from resconfig.io.toml import load
+from resconfig.io import toml
+
+from .bases import BaseTestLoad
 
 content = """
 title = "TOML Example"
@@ -46,23 +47,24 @@
 
 @pytest.fixture
 def stream():
-    yield io.StringIO(content)
+    yield StringIO(content)
 
 
 @pytest.fixture
 def loaded(stream):
-    yield load(stream)
+    yield toml.load(stream)
 
 
 @pytest.fixture
-def dumped(loaded):
-    stream = io.StringIO()
-    dump(loaded, stream)
+def dumped(loaded, stream):
+    toml.dump(loaded, stream)
     stream.seek(0)
     yield stream.read()
 
 
-class TestLoad:
+class TestLoad(BaseTestLoad):
+    module = toml
+
     def test_no_section(self, loaded):
         assert loaded["title"] == "TOML Example"
 

tests/resconfig/io/test_yaml.py

@@ -0,0 +1,78 @@
+from io import StringIO
+
+import pytest
+
+from resconfig.io import yaml
+
+from .bases import BaseTestLoad
+
+content = """
+---
+str: str
+int: 10
+bool: true
+null: null
+array: [0, 1, 2]
+nested:
+  str: mystr
+  int: 10
+"""
+
+
+@pytest.fixture
+def stream():
+    yield StringIO(content)
+
+
+@pytest.fixture
+def loaded(stream):
+    yield yaml.load(stream)
+
+
+@pytest.fixture
+def dumped(loaded, stream):
+    yaml.dump(loaded, stream)
+    stream.seek(0)
+    yield stream.read()
+
+
+class TestLoad(BaseTestLoad):
+    module = yaml
+
+    def test_integer(self, loaded):
+        assert loaded["int"] == 10
+
+    def test_string(self, loaded):
+        assert loaded["str"] == "str"
+
+    def test_bool(self, loaded):
+        assert loaded["bool"] is True
+
+    def test_null(self, loaded):
+        assert loaded[None] is None
+
+    def test_array(self, loaded):
+        assert loaded["array"] == [0, 1, 2]
+
+    def test_nested(self, loaded):
+        assert loaded["nested"]["int"] == 10
+
+
+class TestDump:
+    def test_string(self, dumped):
+        assert "str: str" in dumped
+
+    def test_integer(self, dumped):
+        assert "int: 10" in dumped
+
+    def test_bool(self, dumped):
+        assert "bool: true" in dumped
+
+    def test_null(self, dumped):
+        assert "null: null" in dumped
+
+    def test_array(self, dumped):
+        assert "array:\n- 0\n- 1\n- 2\n" in dumped
+
+    def test_nested(self, dumped):
+        assert "nested:" in dumped