First implementation of services and basic injection. Not working with CLI for now.

tests/test_config.py

@@ -1,6 +1,8 @@
 import pytest
 
-from bonobo import Configurable, Option
+from bonobo.config.configurables import Configurable
+from bonobo.config.options import Option
+from bonobo.config.services import Container, Service, validate_service_name
 
 
 class MyConfigurable(Configurable):
@@ -17,6 +19,26 @@ class MyBetterConfigurable(MyConfigurable):
     required_str = Option(str, required=False, default='kaboom')
 
 
+class PrinterInterface():
+    def print(self, *args):
+        raise NotImplementedError()
+
+
+class ConcretePrinter(PrinterInterface):
+    def __init__(self, prefix):
+        self.prefix = prefix
+
+    def print(self, *args):
+        return ';'.join((self.prefix, *args))
+
+
+class MyServiceDependantConfigurable(Configurable):
+    printer = Service(PrinterInterface, )
+
+    def __call__(self, printer: PrinterInterface, *args):
+        return printer.print(*args)
+
+
 def test_missing_required_option_error():
     with pytest.raises(TypeError) as exc:
         MyConfigurable()
@@ -75,3 +97,37 @@ def test_option_resolution_order():
     assert o.required_str == 'kaboom'
     assert o.default_str == 'foo'
     assert o.integer == None
+
+
+def test_service_name_validator():
+    assert validate_service_name('foo') == 'foo'
+    assert validate_service_name('foo.bar') == 'foo.bar'
+    assert validate_service_name('Foo') == 'Foo'
+    assert validate_service_name('Foo.Bar') == 'Foo.Bar'
+    assert validate_service_name('Foo.a0') == 'Foo.a0'
+
+    with pytest.raises(ValueError):
+        validate_service_name('foo.0')
+
+    with pytest.raises(ValueError):
+        validate_service_name('0.foo')
+
+
+SERVICES = Container(
+    printer0=ConcretePrinter(prefix='0'),
+    printer1=ConcretePrinter(prefix='1'),
+)
+
+
+def test_service_dependency():
+    o = MyServiceDependantConfigurable(printer='printer0')
+
+    assert o(SERVICES.get('printer0'), 'foo', 'bar') == '0;foo;bar'
+    assert o(SERVICES.get('printer1'), 'bar', 'baz') == '1;bar;baz'
+    assert o(*SERVICES.args_for(o), 'foo', 'bar') == '0;foo;bar'
+
+
+def test_service_dependency_unavailable():
+    o = MyServiceDependantConfigurable(printer='printer2')
+    with pytest.raises(KeyError):
+        SERVICES.args_for(o)