Add comprehensive tests for FileReadTool

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/file_read_tool_test.py

@@ -0,0 +1,84 @@
+import os
+import pytest
+from crewai_tools import FileReadTool
+
+def test_file_read_tool_constructor():
+    """Test FileReadTool initialization with file_path."""
+    # Create a temporary test file
+    test_file = "/tmp/test_file.txt"
+    test_content = "Hello, World!"
+    with open(test_file, "w") as f:
+        f.write(test_content)
+
+    # Test initialization with file_path
+    tool = FileReadTool(file_path=test_file)
+    assert tool.file_path == test_file
+    assert "test_file.txt" in tool.description
+
+    # Clean up
+    os.remove(test_file)
+
+def test_file_read_tool_run():
+    """Test FileReadTool _run method with file_path at runtime."""
+    # Create a temporary test file
+    test_file = "/tmp/test_file.txt"
+    test_content = "Hello, World!"
+    with open(test_file, "w") as f:
+        f.write(test_content)
+
+    # Test reading file with runtime file_path
+    tool = FileReadTool()
+    result = tool._run(file_path=test_file)
+    assert result == test_content
+
+    # Clean up
+    os.remove(test_file)
+
+def test_file_read_tool_error_handling():
+    """Test FileReadTool error handling."""
+    # Test missing file path
+    tool = FileReadTool()
+    result = tool._run()
+    assert "Error: No file path provided" in result
+
+    # Test non-existent file
+    result = tool._run(file_path="/nonexistent/file.txt")
+    assert "Error: File not found at path:" in result
+
+    # Test permission error (create a file without read permissions)
+    test_file = "/tmp/no_permission.txt"
+    with open(test_file, "w") as f:
+        f.write("test")
+    os.chmod(test_file, 0o000)
+
+    result = tool._run(file_path=test_file)
+    assert "Error: Permission denied" in result
+
+    # Clean up
+    os.chmod(test_file, 0o666)  # Restore permissions to delete
+    os.remove(test_file)
+
+def test_file_read_tool_constructor_and_run():
+    """Test FileReadTool using both constructor and runtime file paths."""
+    # Create two test files
+    test_file1 = "/tmp/test1.txt"
+    test_file2 = "/tmp/test2.txt"
+    content1 = "File 1 content"
+    content2 = "File 2 content"
+
+    with open(test_file1, "w") as f1, open(test_file2, "w") as f2:
+        f1.write(content1)
+        f2.write(content2)
+
+    # Test that constructor file_path works
+    tool = FileReadTool(file_path=test_file1)
+    result = tool._run()
+    assert result == content1
+
+    # Test that runtime file_path overrides constructor
+    result = tool._run(file_path=test_file2)
+    assert result == content2
+
+    # Clean up
+    os.remove(test_file1)
+    os.remove(test_file2)