Add unit tests for parsers

tests/unit/test_parsers.py

@@ -0,0 +1,149 @@
+import json
+import pytest
+from pathlib import Path
+
+from depaudit.parsers import Parser, ParsedManifest
+from depaudit.parsers.javascript import JavaScriptParser
+from depaudit.parsers.python import PythonParser
+from depaudit.parsers.go import GoParser
+from depaudit.parsers.rust import RustParser
+from depaudit.parsers.java import JavaParser
+
+
+class TestJavaScriptParser:
+    def test_can_parse_package_json(self, temp_dir, sample_package_json):
+        parser = JavaScriptParser()
+        file_path = temp_dir / "package.json"
+        file_path.write_text(json.dumps(sample_package_json))
+        assert parser.can_parse(file_path) is True
+
+    def test_can_parse_package_lock_json(self, temp_dir):
+        parser = JavaScriptParser()
+        file_path = temp_dir / "package-lock.json"
+        file_path.write_text("{}")
+        assert parser.can_parse(file_path) is True
+
+    def test_parse_package_json(self, temp_dir, sample_package_json):
+        parser = JavaScriptParser()
+        file_path = temp_dir / "package.json"
+        file_path.write_text(json.dumps(sample_package_json))
+
+        manifest = parser.parse(file_path)
+
+        assert manifest.language == "javascript"
+        assert manifest.project_name == "test-project"
+        assert manifest.project_version == "1.0.0"
+        assert len(manifest.dependencies) == 4
+
+        dep_names = {d.name for d in manifest.dependencies}
+        assert "express" in dep_names
+        assert "lodash" in dep_names
+        assert "jest" in dep_names
+        assert "fsevents" in dep_names
+
+
+class TestPythonParser:
+    def test_can_parse_requirements_txt(self, temp_dir):
+        parser = PythonParser()
+        file_path = temp_dir / "requirements.txt"
+        file_path.write_text("")
+        assert parser.can_parse(file_path) is True
+
+    def test_can_parse_pyproject_toml(self, temp_dir):
+        parser = PythonParser()
+        file_path = temp_dir / "pyproject.toml"
+        file_path.write_text("")
+        assert parser.can_parse(file_path) is True
+
+    def test_parse_requirements_txt(self, temp_dir, sample_requirements_txt):
+        parser = PythonParser()
+        file_path = temp_dir / "requirements.txt"
+        file_path.write_text(sample_requirements_txt)
+
+        manifest = parser.parse(file_path)
+
+        assert manifest.language == "python"
+        dep_names = {d.name for d in manifest.dependencies}
+        assert "requests" in dep_names
+        assert "flask" in dep_names
+        assert "pytest" in dep_names
+
+
+class TestGoParser:
+    def test_can_parse_go_mod(self, temp_dir):
+        parser = GoParser()
+        file_path = temp_dir / "go.mod"
+        file_path.write_text("")
+        assert parser.can_parse(file_path) is True
+
+    def test_parse_go_mod(self, temp_dir, sample_go_mod):
+        parser = GoParser()
+        file_path = temp_dir / "go.mod"
+        file_path.write_text(sample_go_mod)
+
+        manifest = parser.parse(file_path)
+
+        assert manifest.language == "go"
+        assert "github.com/test/project" in (manifest.project_name or "")
+
+        dep_names = {d.name for d in manifest.dependencies}
+        assert "github.com/gin-gonic/gin" in dep_names
+        assert "github.com/spf13/viper" in dep_names
+
+
+class TestRustParser:
+    def test_can_parse_cargo_toml(self, temp_dir):
+        parser = RustParser()
+        file_path = temp_dir / "Cargo.toml"
+        file_path.write_text("")
+        assert parser.can_parse(file_path) is True
+
+    def test_parse_cargo_toml(self, temp_dir, sample_cargo_toml):
+        parser = RustParser()
+        file_path = temp_dir / "Cargo.toml"
+        file_path.write_text(sample_cargo_toml)
+
+        manifest = parser.parse(file_path)
+
+        assert manifest.language == "rust"
+        assert manifest.project_name == "test-project"
+
+        dep_names = {d.name for d in manifest.dependencies}
+        assert "serde" in dep_names
+        assert "tokio" in dep_names
+
+
+class TestJavaParser:
+    def test_can_parse_pom_xml(self, temp_dir):
+        parser = JavaParser()
+        file_path = temp_dir / "pom.xml"
+        file_path.write_text("")
+        assert parser.can_parse(file_path) is True
+
+    def test_parse_pom_xml(self, temp_dir, sample_pom_xml):
+        parser = JavaParser()
+        file_path = temp_dir / "pom.xml"
+        file_path.write_text(sample_pom_xml)
+
+        manifest = parser.parse(file_path)
+
+        assert manifest.language == "java"
+        assert "com.example" in (manifest.project_name or "")
+
+
+class TestParserFactory:
+    def test_get_parser_for_package_json(self, temp_dir):
+        from depaudit.parsers.factory import ParserFactory
+        file_path = temp_dir / "package.json"
+        file_path.write_text("{}")
+        parser = ParserFactory.get_parser(file_path)
+        assert parser is not None
+        assert isinstance(parser, JavaScriptParser)
+
+    def test_get_parser_for_requirements_txt(self, temp_dir):
+        from depaudit.parsers.factory import ParserFactory
+        file_path = temp_dir / "requirements.txt"
+        file_path.write_text("")
+        parser = ParserFactory.get_parser(file_path)
+        assert parser is not None
+        assert isinstance(parser, PythonParser)