S allius/issue395 (#399)

* add button for languages setting

* build a web module for the dashboard

- load all python module from local dir
- initialize Blueprint and Babel

* set a default key for secure cookies

* add translations to docker container

* improve translation build  

- clean target erases the *.pot
- don't modify the resurt of url_for() calls
- don't translate the language description

* translate connection table, fix icon

* build relative urls for HA ingress

* fix unit test, increase coverage

app/tests/test_web_route.py

@@ -1,13 +1,19 @@
 # test_with_pytest.py
 import pytest
 from server import app
-
+from web import Web, web
 from async_stream import AsyncStreamClient
 from gen3plus.inverter_g3p import InverterG3P
 from test_inverter_g3p import FakeReader, FakeWriter, config_conn
 
 pytest_plugins = ('pytest_asyncio',)
 
+@pytest.fixture(scope="session")
+def client():
+    app.secret_key = 'super secret key'
+    Web(app, '../transfer', False)
+    return app.test_client()
+
 @pytest.fixture
 def create_inverter(config_conn):
     _ = config_conn
@@ -36,58 +42,59 @@ def create_inverter_client(config_conn):
     return inv
 
 @pytest.mark.asyncio
-async def test_home():
+async def test_home(client):
     """Test the home route."""
-    client = app.test_client()
     response = await client.get('/')
     assert response.status_code == 200
     assert response.mimetype == 'text/html'
 
 @pytest.mark.asyncio
-async def test_page():
+async def test_page(client):
     """Test the empty page route."""
-    client = app.test_client()
     response = await client.get('/page')
     assert response.status_code == 200
     assert response.mimetype == 'text/html'
 
+@pytest.mark.asyncio
+async def test_rel_page(client):
+    """Test the empty page route."""
+    web.build_relative_urls = True
+    response = await client.get('/page')
+    assert response.status_code == 200
+    assert response.mimetype == 'text/html'
+    web.build_relative_urls = False
 
 @pytest.mark.asyncio
-async def test_favicon96():
+async def test_favicon96(client):
     """Test the favicon-96x96.png route."""
-    client = app.test_client()
     response = await client.get('/favicon-96x96.png')
     assert response.status_code == 200
     assert response.mimetype == 'image/png'
 
 @pytest.mark.asyncio
-async def test_favicon():
+async def test_favicon(client):
     """Test the favicon.ico route."""
-    client = app.test_client()
     response = await client.get('/favicon.ico')
     assert response.status_code == 200
     assert response.mimetype == 'image/x-icon'
 
 @pytest.mark.asyncio
-async def test_favicon_svg():
+async def test_favicon_svg(client):
     """Test the favicon.svg route."""
-    client = app.test_client()
     response = await client.get('/favicon.svg')
     assert response.status_code == 200
     assert response.mimetype == 'image/svg+xml'
 
 @pytest.mark.asyncio
-async def test_apple_touch_icon():
+async def test_apple_touch_icon(client):
     """Test the apple-touch-icon.png route."""
-    client = app.test_client()
     response = await client.get('/apple-touch-icon.png')
     assert response.status_code == 200
     assert response.mimetype == 'image/png'
 
 @pytest.mark.asyncio
-async def test_manifest():
+async def test_manifest(client):
     """Test the site.webmanifest route."""
-    client = app.test_client()
     response = await client.get('/site.webmanifest')
     assert response.status_code == 200
     assert response.mimetype == 'application/manifest+json'
@@ -124,3 +131,29 @@ async def test_data_fetch2(create_inverter_client):
 
     response = await client.get('/data-fetch')
     assert response.status_code == 200
+
+@pytest.mark.asyncio
+async def test_language_en(client):
+    """Test the language/en route."""
+    response = await client.get('/language/en')
+    assert response.status_code == 302
+    assert response.mimetype == 'text/html'
+
+    client.set_cookie('test', key='language', value='de')
+    response = await client.get('/page')
+    assert response.status_code == 200
+    assert response.mimetype == 'text/html'
+
+@pytest.mark.asyncio
+async def test_language_de(client):
+    """Test the language/en route."""
+    response = await client.get('/language/de')
+    assert response.status_code == 302
+    assert response.mimetype == 'text/html'
+
+@pytest.mark.asyncio
+async def test_language_unknown(client):
+    """Test the language/en route."""
+    response = await client.get('/language/unknonw')
+    assert response.status_code == 404
+    assert response.mimetype == 'text/html'