/**
* Detox test output parsing
* Extracts MCP result markers from test stdout
*/
import { createError } from "../core/errors.js";
import { logger } from "../core/logger.js";
export interface DetoxActionResult {
ok: boolean;
elapsedMs?: number;
data?: Record<string, unknown>;
error?: {
message: string;
name: string;
stack?: string;
};
}
const MCP_RESULT_PATTERN = /\[MCP_RESULT\](.*?)\[\/MCP_RESULT\]/s;
export function parseDetoxOutput(stdout: string): DetoxActionResult {
const match = stdout.match(MCP_RESULT_PATTERN);
if (!match) {
logger.warn("detox", "No MCP_RESULT marker found in output", {
stdout: stdout.slice(-1000),
});
// Try to detect common Detox errors
if (stdout.includes("Element not found")) {
return {
ok: false,
error: {
name: "DetoxError",
message: "Element not found - check selector or wait for element",
},
};
}
if (stdout.includes("Timeout")) {
return {
ok: false,
error: {
name: "TimeoutError",
message: "Action timed out",
},
};
}
return {
ok: false,
error: {
name: "ParseError",
message: "Could not parse Detox output - no result marker found",
},
};
}
try {
const result = JSON.parse(match[1]) as DetoxActionResult;
return result;
} catch (error) {
logger.error("detox", "Failed to parse MCP_RESULT JSON", {
raw: match[1],
error: error instanceof Error ? error.message : "Unknown",
});
return {
ok: false,
error: {
name: "ParseError",
message: `Failed to parse result JSON: ${error instanceof Error ? error.message : "Unknown"}`,
},
};
}
}
export function detectTestFailure(stdout: string, stderr: string): string | null {
// Check for Jest test failures
if (stdout.includes("FAIL") || stderr.includes("FAIL")) {
const failMatch = stdout.match(/●\s+(.+)/);
if (failMatch) {
return failMatch[1];
}
return "Test failed";
}
// Check for Detox errors
if (stderr.includes("DetoxError")) {
const errorMatch = stderr.match(/DetoxError:\s+(.+)/);
if (errorMatch) {
return errorMatch[1];
}
}
// Check for element not found
if (stdout.includes("Cannot find") || stderr.includes("Cannot find")) {
return "Element not found";
}
return null;
}
export function extractScreenshotPath(result: DetoxActionResult): string | null {
if (result.data && typeof result.data.screenshotPath === "string") {
return result.data.screenshotPath;
}
return null;
}
