Add more tests to cover the basic translation of objects to strings.

This would have found an extra bug that was pushed unfixed after enum
conversion, and two bugs that I did find during the conversion.

test/test_common.py

@@ -6,6 +6,7 @@
 __copyright__ = 'Copyright © 2013, Diego Elio Pettenò'
 __license__ = 'MIT'
 
+import datetime
 import os
 import sys
 import unittest
@@ -52,5 +53,78 @@ def test_invalid_values(self, from_unit, to_unit):
             common.convert_glucose_unit(100, from_unit, to_unit)
 
 
+class TestGlucoseReading(parameterized.TestCase):
+
+    TEST_DATETIME = datetime.datetime(2018, 1 ,1, 0, 30, 45)
+
+    def test_minimal(self):
+        reading = common.GlucoseReading(self.TEST_DATETIME, 100)
+        self.assertEqual(reading.as_csv(common.Unit.MG_DL),
+                         '"2018-01-01 00:30:45","100.00","","blood sample",""')
+
+    @parameterized.named_parameters(
+        ('_mgdl', common.Unit.MG_DL, 100),
+        ('_mmoll', common.Unit.MMOL_L, 5.56))
+    def test_value(self, unit, expected_value):
+        reading = common.GlucoseReading(self.TEST_DATETIME, 100)
+        self.assertAlmostEqual(
+            reading.get_value_as(unit), expected_value, places=2)
+
+    @parameterized.named_parameters(
+        ('_meal_none',
+         {'meal': common.Meal.NONE},
+         '"2018-01-01 00:30:45","100.00","","blood sample",""'),
+        ('_meal_before',
+         {'meal': common.Meal.BEFORE},
+         '"2018-01-01 00:30:45","100.00","Before Meal","blood sample",""'),
+        ('_meal_after',
+         {'meal': common.Meal.AFTER},
+         '"2018-01-01 00:30:45","100.00","After Meal","blood sample",""'),
+        ('_measurement_blood',
+         {'measure_method': common.MeasurementMethod.BLOOD_SAMPLE},
+         '"2018-01-01 00:30:45","100.00","","blood sample",""'),
+        ('_measurement_cgm',
+         {'measure_method': common.MeasurementMethod.CGM},
+         '"2018-01-01 00:30:45","100.00","","CGM",""'),
+        ('_comment',
+         {'comment': 'too much'},
+         '"2018-01-01 00:30:45","100.00","","blood sample","too much"'),
+        ('_comment_quoted',
+         {'comment': '"too" much'},
+         '"2018-01-01 00:30:45","100.00","","blood sample","\"too\" much"'),
+    )
+    def test_csv(self, kwargs_dict, expected_csv):
+        reading = common.GlucoseReading(
+            self.TEST_DATETIME, 100, **kwargs_dict)
+        self.assertEqual(reading.as_csv(common.Unit.MG_DL), expected_csv)
+
+
+class TestMeterInfo(parameterized.TestCase):
+
+    @parameterized.named_parameters(
+        ('_no_serial_number',
+         {},
+         'Serial Number: N/A\n'),
+        ('_serial_number',
+         {'serial_number': 1234},
+         'Serial Number: 1234\n'),
+        ('_no_version_information',
+         {},
+         'Version Information:\n    N/A\n'),
+        ('_version_information_1',
+         {'version_info': ['test']},
+         'Version Information:\n    test\n'),
+        ('_version_information_2',
+         {'version_info': ['test', 'test2']},
+         'Version Information:\n    test\n    test2\n'),
+        ('_default_native_unit',
+         {},
+         'Native Unit: mg/dL\n'),
+    )
+    def test_meter_info(self, kwargs_dict, expected_fragment):
+        info = common.MeterInfo(self.id(), **kwargs_dict)
+        self.assertIn(expected_fragment, str(info))
+
+
 if __name__ == '__main__':
         unittest.main()