improve coverage

crates/jiter-python/tests/test_jiter.py

@@ -258,6 +258,17 @@ def test_lossless_floats():
     assert str(f) == '123.456789123456789e45'
     assert repr(f) == 'LosslessFloat(123.456789123456789e45)'
 
+    f = jiter.from_json(b'123', float_mode='lossless-float')
+    assert isinstance(f, int)
+    assert f == 123
+
+    with pytest.raises(ValueError, match='expected value at line 1 column 1'):
+        jiter.from_json(b'wrong', float_mode='lossless-float')
+
+    with pytest.raises(ValueError, match='trailing characters at line 1 column 2'):
+        jiter.from_json(b'1wrong', float_mode='lossless-float')
+
+
 
 def test_decimal_floats():
     f = jiter.from_json(b'12.3')
@@ -272,11 +283,15 @@ def test_decimal_floats():
     assert isinstance(f, Decimal)
     assert f == Decimal('1.23456789123456789E+47')
 
+    f = jiter.from_json(b'123', float_mode='decimal')
+    assert isinstance(f, int)
+    assert f == 123
+
+    with pytest.raises(ValueError, match='expected value at line 1 column 1'):
+        jiter.from_json(b'wrong', float_mode='decimal')
 
-def test_lossless_floats_int():
-    v = jiter.from_json(b'123', float_mode='lossless-float')
-    assert isinstance(v, int)
-    assert v == 123
+    with pytest.raises(ValueError, match='trailing characters at line 1 column 2'):
+        jiter.from_json(b'1wrong', float_mode='decimal')
 
 
 def test_unicode_roundtrip():