refactors environment_fixtures

tests/fixtures/environment/environment_fixtures.py

@@ -1,12 +1,11 @@
-import datetime
-
 import pytest
-
+import os
+from datetime import datetime, timedelta
 from rocketpy import Environment, EnvironmentAnalysis
 
 
 @pytest.fixture
-def example_env():
+def example_plain_env():
     """Simple object of the Environment class to be used in the tests.
 
     Returns
@@ -24,43 +23,35 @@ def example_date_naive():
     -------
     datetime.datetime
     """
-    return datetime.datetime.now()
+    return datetime.now() + timedelta(days=1)
 
 
 @pytest.fixture
-def example_env_robust():
-    """Create an object of the Environment class to be used in the tests. This
-    allows to avoid repeating the same code in all tests. The environment set
-    here is a bit more complex than the one in the example_env fixture. This
-    time the latitude, longitude and elevation are set, as well as the datum and
-    the date. The location refers to the Spaceport America Cup launch site,
-    while the date is set to tomorrow at noon.
+def example_spaceport_env(example_date_naive):
+    """Environment class with location set to Spaceport America Cup launch site
 
     Returns
     -------
     rocketpy.Environment
-        An object of the Environment class
     """
-    env = Environment(
+    spaceport_env = Environment(
         latitude=32.990254,
         longitude=-106.974998,
         elevation=1400,
         datum="WGS84",
     )
-    tomorrow = datetime.date.today() + datetime.timedelta(days=1)
-    env.set_date((tomorrow.year, tomorrow.month, tomorrow.day, 12))
-    return env
+    spaceport_env.set_date(example_date_naive)
+    yield spaceport_env
+    os.remove("environment.json")
 
 
 @pytest.fixture
 def env_analysis():
-    """Create a simple object of the Environment Analysis class to be used in
-    the tests. This allows to avoid repeating the same code in all tests.
+    """Environment Analysis class with hardcoded parameters 
 
     Returns
     -------
     EnvironmentAnalysis
-        A simple object of the Environment Analysis class
     """
     env_analysis = EnvironmentAnalysis(
         start_date=datetime.datetime(2019, 10, 23),