add tests

tests/test_utils.py

@@ -0,0 +1,47 @@
+import pytest
+
+from hyp3lib.utils import ESA_HOST, get_esa_credentials
+
+
+def test_get_esa_credentials_env(tmp_path, monkeypatch):
+    with monkeypatch.context() as m:
+        m.setenv('ESA_USERNAME', 'foo')
+        m.setenv('ESA_PASSWORD', 'bar')
+        m.setenv('HOME', str(tmp_path))
+        (tmp_path / '.netrc').write_text(f'machine {ESA_HOST} login netrc_username password netrc_password')
+
+        username, password = get_esa_credentials()
+        assert username == 'foo'
+        assert password == 'bar'
+
+
+def test_get_esa_credentials_netrc(tmp_path, monkeypatch):
+    with monkeypatch.context() as m:
+        m.delenv('ESA_USERNAME', raising=False)
+        m.delenv('ESA_PASSWORD', raising=False)
+        m.setenv('HOME', str(tmp_path))
+        (tmp_path / '.netrc').write_text(f'machine {ESA_HOST} login foo password bar')
+
+        username, password = get_esa_credentials()
+        assert username == 'foo'
+        assert password == 'bar'
+
+
+def test_get_esa_credentials_missing(tmp_path, monkeypatch):
+    with monkeypatch.context() as m:
+        m.delenv('ESA_USERNAME', raising=False)
+        m.setenv('ESA_PASSWORD', 'env_password')
+        m.setenv('HOME', str(tmp_path))
+        (tmp_path / '.netrc').write_text('')
+        msg = 'Please provide.*'
+        with pytest.raises(ValueError, match=msg):
+            get_esa_credentials()
+
+    with monkeypatch.context() as m:
+        m.setenv('ESA_USERNAME', 'env_username')
+        m.delenv('ESA_PASSWORD', raising=False)
+        m.setenv('HOME', str(tmp_path))
+        (tmp_path / '.netrc').write_text('')
+        msg = 'Please provide.*'
+        with pytest.raises(ValueError, match=msg):
+            get_esa_credentials()