test: configure Travis for CI

tests/conftest.py

@@ -0,0 +1,11 @@
+import pytest
+
+from lnbits import app
+
+
+@pytest.fixture
+def client():
+    app.config["TESTING"] = True
+
+    with app.test_client() as client:
+        yield client

tests/core/test_views.py

@@ -0,0 +1,3 @@
+def test_homepage(client):
+    r = client.get("/")
+    assert b"Add a new wallet" in r.data