Fix API URL trailing slash and update base URL

app/api/lapis.py

@@ -7,9 +7,10 @@
 
 class Lapis:
     """Base class for LAPIS API queries."""
-    
+
     def __init__(self, server_ip):
-        self.server_ip = server_ip
+        # Normalize URL by removing trailing slashes to prevent double-slash issues
+        self.server_ip = server_ip.rstrip("/")
 
     @staticmethod
     def parse_url_hostname(url_string):
@@ -40,7 +41,7 @@ def fetch_locations(self, default_locations=None) -> list[str]:
             locations = st.session_state.locations
             return locations
         # Use the full server_ip URL directly instead of parsing it
-        location_url = f'{self.server_ip.rstrip("/")}/sample/aggregated?fields=locationName&limit=100&orderBy=locationName&dataFormat=JSON&downloadAsFile=false'
+        location_url = f'{self.server_ip}/sample/aggregated?fields=locationName&limit=100&orderBy=locationName&dataFormat=JSON&downloadAsFile=false'
         try:
             logging.info(f"Attempting to fetch locations from: {location_url}")
             st.toast("Attempting to fetch locations from API...", icon="🔄") # Temporary toast

app/config.yaml

@@ -1,5 +1,5 @@
 server:
-  lapis_address: "https://lapis.wasap.genspectrum.org/"
+  lapis_address: "https://lapis.wasap.genspectrum.org/covid"
   cov_spectrum_api: "https://lapis.cov-spectrum.org"
 
 curated_variant_definitions:

app/tests/test_wiseloculus.py

@@ -13,9 +13,35 @@
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
 from api.wiseloculus import WiseLoculusLapis
+from api.lapis import Lapis
 from interface import MutationType
 
 
+# Tests for URL normalization (trailing slash handling)
+def test_lapis_normalizes_trailing_slash():
+    """Test that Lapis base class strips trailing slashes from server_ip."""
+    lapis = Lapis("https://example.com/")
+    assert lapis.server_ip == "https://example.com", "Trailing slash should be stripped"
+
+
+def test_lapis_preserves_url_without_trailing_slash():
+    """Test that Lapis base class preserves URLs without trailing slashes."""
+    lapis = Lapis("https://example.com")
+    assert lapis.server_ip == "https://example.com", "URL without trailing slash should remain unchanged"
+
+
+def test_lapis_normalizes_multiple_trailing_slashes():
+    """Test that Lapis strips multiple trailing slashes."""
+    lapis = Lapis("https://example.com///")
+    assert lapis.server_ip == "https://example.com", "Multiple trailing slashes should be stripped"
+
+
+def test_wiseloculus_inherits_url_normalization():
+    """Test that WiseLoculusLapis inherits URL normalization from Lapis."""
+    api = WiseLoculusLapis("https://lapis.wasap.genspectrum.org/")
+    assert api.server_ip == "https://lapis.wasap.genspectrum.org", "WiseLoculusLapis should inherit URL normalization"
+
+
 def test_mutations_to_and_query_empty():
     """Test _mutations_to_and_query with empty list."""
     api = WiseLoculusLapis("http://test-server.com")