feat: Add synopisis core loop (#166)

Co-authored-by: Michael Neale <michael.neale@gmail.com>

tests/synopsis/test_system.py

@@ -0,0 +1,93 @@
+import os
+from unittest.mock import Mock
+import pytest
+from goose.synopsis.system import OperatingSystem
+
+
+@pytest.fixture
+def os_instance(tmpdir):
+    original_cwd = os.getcwd()
+    os.chdir(tmpdir)
+    yield OperatingSystem(cwd=str(tmpdir))
+    os.chdir(original_cwd)
+
+
+def test_to_relative(os_instance, tmpdir):
+    abs_path = os.path.join(tmpdir, "test_file.txt")
+    rel_path = os_instance.to_relative(abs_path)
+    assert rel_path == "test_file.txt"
+
+
+def test_remember_forget_file(os_instance, tmpdir):
+    test_file = tmpdir.join("test_file.txt")
+    test_file.write("test content")
+
+    os_instance.remember_file(str(test_file))
+    assert os_instance.is_active(str(test_file))
+
+    os_instance.forget_file(str(test_file))
+    assert not os_instance.is_active(str(test_file))
+
+
+def test_active_files(os_instance, tmpdir):
+    test_file1 = tmpdir.join("test_file1.txt")
+    test_file2 = tmpdir.join("test_file2.py")
+    test_file1.write("test content 1")
+    test_file2.write("test content 2")
+
+    os_instance.remember_file(str(test_file1))
+    os_instance.remember_file(str(test_file2))
+
+    active_files = list(os_instance.active_files)
+    assert len(active_files) == 2
+    assert any(f.path == "test_file1.txt" for f in active_files)
+    assert any(f.path == "test_file2.py" for f in active_files)
+
+
+def test_info(os_instance):
+    info = os_instance.info()
+    assert "os" in info
+    assert "cwd" in info
+    assert "shell" in info
+
+
+def test_add_process(os_instance):
+    process = Mock()
+    process.pid = 1234
+    process.stdout = Mock()
+    process.stdout.fileno.return_value = 1
+    process_id = os_instance.add_process(process)
+    assert process_id == 1234
+    assert 1234 in os_instance._processes
+
+
+def test_get_processes(os_instance):
+    process1 = Mock()
+    process1.pid = 1234
+    process1.args = "python -m http.server 8000"
+    process1.stdout = Mock()
+    process1.stdout.fileno.return_value = 1
+    os_instance.add_process(process1)
+
+    process2 = Mock()
+    process2.pid = 5678
+    process2.args = "python script.py"
+    process2.stdout = Mock()
+    process2.stdout.fileno.return_value = 2
+    os_instance.add_process(process2)
+
+    processes = os_instance.get_processes()
+    assert processes == {1234: "python -m http.server 8000", 5678: "python script.py"}
+
+
+def test_cancel_process(os_instance):
+    process = Mock()
+    process.pid = 1234
+    process.stdout = Mock()
+    process.stdout.fileno.return_value = 1
+    os_instance.add_process(process)
+
+    result = os_instance.cancel_process(1234)
+    assert result is True
+    assert 1234 not in os_instance._processes
+    process.terminate.assert_called_once()