Add tests for all different fields

stix2/test/test_stix2.py

@@ -21,11 +21,6 @@ def test_timestamp_formatting(dt, timestamp):
     assert stix2.format_datetime(dt) == timestamp
 
 
-def test_basic_indicator():
-    indicator = stix2.Indicator()
-    assert indicator.id.startswith("indicator")
-
-
 EXPECTED = """{
     "created": "2017-01-01T00:00:00Z",
     "id": "indicator--01234567-89ab-cdef-0123-456789abcdef",
@@ -46,11 +41,26 @@ def test_indicator_with_all_required_fields():
     indicator = stix2.Indicator(
         type="indicator",
         id="indicator--01234567-89ab-cdef-0123-456789abcdef",
-        created=now,
-        modified=now,
         labels=['malicious-activity'],
         pattern="[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']",
+        created=now,
+        modified=now,
         valid_from=epoch,
     )
 
     assert str(indicator) == EXPECTED
+
+
+def test_indicator_autogenerated_fields():
+    indicator = stix2.Indicator(
+        labels=['malicious-activity'],
+        pattern="[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']",
+    )
+
+    assert indicator.type == 'indicator'
+    assert indicator.id.startswith('indicator--')
+    assert indicator.created is not None
+    assert indicator.modified is not None
+    assert indicator.labels == ['malicious-activity']
+    assert indicator.pattern == "[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']"
+    assert indicator.valid_from is not None