Add safeguard tests for dealing with dataclasses

tests/test_dataclasses.py

@@ -0,0 +1,243 @@
+# SPDX-FileCopyrightText: 2025 Alexandre Gomes Gaigalas <alganet@gmail.com>
+#
+# SPDX-License-Identifier: ISC
+
+from dataclasses import InitVar, dataclass, field
+from typing import Protocol
+
+import apywire
+
+
+@dataclass
+class Config:
+    host: str
+    port: int
+
+
+@dataclass
+class App:
+    config: Config
+    name: str
+
+
+@dataclass
+class DefaultConfig:
+    host: str = "localhost"
+    port: int = 8080
+
+
+@dataclass
+class PostInitConfig:
+    host: str
+    port: int
+    url: str = field(init=False)
+
+    def __post_init__(self) -> None:
+        self.url = f"http://{self.host}:{self.port}"
+
+
+@dataclass
+class InitVarConfig:
+    host: str
+    port: int
+    debug: InitVar[bool] = False
+    mode: str = field(init=False)
+
+    def __post_init__(self, debug: bool) -> None:
+        self.mode = "debug" if debug else "production"
+
+
+def test_dataclass_runtime() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.Config config": {
+            "host": "localhost",
+            "port": 8080,
+        }
+    }
+    wired = apywire.Wiring(spec)
+    config = wired.config()
+    assert isinstance(config, Config)
+    assert config.host == "localhost"
+    assert config.port == 8080
+
+
+def test_dataclass_compiled() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.Config config": {
+            "host": "localhost",
+            "port": 8080,
+        }
+    }
+    compiler = apywire.WiringCompiler(spec)
+    code = compiler.compile()
+
+    class MockConfig(Protocol):
+        def config(self) -> Config: ...
+
+    execd: dict[str, MockConfig] = {}
+    exec(code, execd)
+
+    wired = execd["compiled"]
+    config = wired.config()
+
+    assert isinstance(config, Config)
+    assert config.host == "localhost"
+    assert config.port == 8080
+
+
+def test_nested_dataclass_runtime() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.Config config": {
+            "host": "localhost",
+            "port": 8080,
+        },
+        "tests.test_dataclasses.App app": {
+            "config": "{config}",
+            "name": "MyApp",
+        },
+    }
+    wired = apywire.Wiring(spec)
+    app = wired.app()
+    assert isinstance(app, App)
+    assert isinstance(app.config, Config)
+    assert app.config.host == "localhost"
+    assert app.name == "MyApp"
+
+
+def test_nested_dataclass_compiled() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.Config config": {
+            "host": "localhost",
+            "port": 8080,
+        },
+        "tests.test_dataclasses.App app": {
+            "config": "{config}",
+            "name": "MyApp",
+        },
+    }
+    compiler = apywire.WiringCompiler(spec)
+    code = compiler.compile()
+
+    class MockApp(Protocol):
+        def app(self) -> App: ...
+
+    execd: dict[str, MockApp] = {}
+    exec(code, execd)
+
+    wired = execd["compiled"]
+    app = wired.app()
+
+    assert isinstance(app, App)
+    assert isinstance(app.config, Config)
+    assert app.config.host == "localhost"
+    assert app.name == "MyApp"
+
+
+def test_dataclass_default_runtime() -> None:
+    spec: apywire.Spec = {"tests.test_dataclasses.DefaultConfig config": {}}
+    wired = apywire.Wiring(spec)
+    config = wired.config()
+    assert isinstance(config, DefaultConfig)
+    assert config.host == "localhost"
+    assert config.port == 8080
+
+
+def test_dataclass_default_compiled() -> None:
+    spec: apywire.Spec = {"tests.test_dataclasses.DefaultConfig config": {}}
+    compiler = apywire.WiringCompiler(spec)
+    code = compiler.compile()
+
+    class MockDefaultConfig(Protocol):
+        def config(self) -> DefaultConfig: ...
+
+    execd: dict[str, MockDefaultConfig] = {}
+    exec(code, execd)
+
+    wired = execd["compiled"]
+    config = wired.config()
+
+    assert isinstance(config, DefaultConfig)
+    assert config.host == "localhost"
+    assert config.port == 8080
+
+
+def test_dataclass_post_init_runtime() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.PostInitConfig config": {
+            "host": "localhost",
+            "port": 8080,
+        }
+    }
+    wired = apywire.Wiring(spec)
+    config = wired.config()
+    assert isinstance(config, PostInitConfig)
+    assert config.host == "localhost"
+    assert config.port == 8080
+    assert config.url == "http://localhost:8080"
+
+
+def test_dataclass_post_init_compiled() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.PostInitConfig config": {
+            "host": "localhost",
+            "port": 8080,
+        }
+    }
+    compiler = apywire.WiringCompiler(spec)
+    code = compiler.compile()
+
+    class MockPostInitConfig(Protocol):
+        def config(self) -> PostInitConfig: ...
+
+    execd: dict[str, MockPostInitConfig] = {}
+    exec(code, execd)
+
+    wired = execd["compiled"]
+    config = wired.config()
+
+    assert isinstance(config, PostInitConfig)
+    assert config.host == "localhost"
+    assert config.port == 8080
+    assert config.url == "http://localhost:8080"
+
+
+def test_dataclass_init_var_runtime() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.InitVarConfig config": {
+            "host": "localhost",
+            "port": 8080,
+            "debug": True,
+        }
+    }
+    wired = apywire.Wiring(spec)
+    config = wired.config()
+    assert isinstance(config, InitVarConfig)
+    assert config.host == "localhost"
+    assert config.port == 8080
+    assert config.mode == "debug"
+
+
+def test_dataclass_init_var_compiled() -> None:
+    spec: apywire.Spec = {
+        "tests.test_dataclasses.InitVarConfig config": {
+            "host": "localhost",
+            "port": 8080,
+            "debug": True,
+        }
+    }
+    compiler = apywire.WiringCompiler(spec)
+    code = compiler.compile()
+
+    class MockInitVarConfig(Protocol):
+        def config(self) -> InitVarConfig: ...
+
+    execd: dict[str, MockInitVarConfig] = {}
+    exec(code, execd)
+
+    wired = execd["compiled"]
+    config = wired.config()
+
+    assert isinstance(config, InitVarConfig)
+    assert config.host == "localhost"
+    assert config.port == 8080
+    assert config.mode == "debug"