Add dummy verifier class for tests

.gitignore

@@ -166,3 +166,5 @@ config_dev.toml
 
 # Proprietary source code samples.
 uav_test.sh
+
+addons/

esbmc_ai/verifiers/dummy_verifier.py

@@ -0,0 +1,85 @@
+# Author: Yiannis Charalambous
+
+"""This module holds the code for a dummy source code verifier."""
+
+from typing import Any, Optional, override
+
+from esbmc_ai.solution import SourceFile
+from esbmc_ai.config import ConfigField
+from esbmc_ai.verifiers.base_source_verifier import BaseSourceVerifier, VerifierOutput
+
+
+class DummyVerifierOutput(VerifierOutput):
+    """Class that represents the dummy verifier output. The output is going to
+    be blank, and the return code can be set to whatever value. If it is 0, it
+    will be successful."""
+
+    return_code: int
+    """The return code of the verifier."""
+    output: str
+    """The output of the verifier."""
+
+    @override
+    def successful(self) -> bool:
+        return self.return_code == 0
+
+
+class DummyVerifier(BaseSourceVerifier):
+    """The base class for creating a source verifier for ESBMC-AI. In order for
+    this class to work with ESBMC-AI, the constructor must have default values
+    to all arguments because it will be invoked without passing anything.
+
+    Loading from the config will be permitted but it would be preferred if you
+    use the base class method `get_config_value`. The fields of the config that
+    are going to be loaded need to be declared and returned by the
+    `get_config_fields` method. The config loader will automatically preppend
+    the verifier_name declared to each key so that there are no clashes in the
+    config. So the verifier "esbmc" will have for key "timeout" the following
+    field in the config: "esbmc.timeout"."""
+
+    def __init__(self) -> None:
+        """Creates a new dummy verifier."""
+        super().__init__(verifier_name="dummy_verifier")
+
+    @override
+    def get_config_fields(self) -> list[ConfigField]:
+        return []
+
+    @override
+    def verify_source(
+        self,
+        source_file: SourceFile,
+        source_file_iteration: int = -1,
+        **kwargs: Any,
+    ) -> DummyVerifierOutput:
+        """Verifies source_file, the kwargs are optional arguments that are
+        child dependent. For API purposes, the overriden method can provide the
+        abilitiy to override values that would be loaded from the config by
+        specifying them in the kwargs."""
+        _ = source_file
+        _ = source_file_iteration
+        value = kwargs["value"] if "value" in kwargs else 0
+        return DummyVerifierOutput(value, "")
+
+    @override
+    def apply_formatting(self, verifier_output: str, format: str) -> str:
+        _ = format
+        return verifier_output
+
+    @override
+    def get_error_line(self, verifier_output: str) -> Optional[int]:
+        """1"""
+        _ = verifier_output
+        return 1
+
+    @override
+    def get_error_line_idx(self, verifier_output: str) -> Optional[int]:
+        """0"""
+        _ = verifier_output
+        return 0
+
+    @override
+    def get_error_type(self, verifier_output: str) -> Optional[str]:
+        """Returns empty string"""
+        _ = verifier_output
+        return ""