get-context
Extract website context for generating test cases efficiently. Integrated with Playwright MCP server, it provides real-time page and element details to enhance test accuracy and streamline test case creation.
Instructions
Get the website context which would be used to write the testcase
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Input Schema (JSON Schema)
{
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"properties": {},
"type": "object"
}
Implementation Reference
- src/mcp/index.ts:231-234 (registration)Registration of the get-context tool in the MCP server, specifying name, description, empty input schema, and inline handler function.server.tool( "get-context", "Get the website context which would be used to write the testcase", {},
- src/mcp/index.ts:235-312 (handler)The handler function that logs the event, retrieves the current state, processes messages (DOM, Text, Interaction, Image) into text or image content while limiting total length to 20k characters, removes processed messages from state, adds note if remaining, and returns the content array.async () => { posthogServer.capture({ distinctId: getUserId(), event: 'get_context', }); const state = getState(); if (state.messages.length === 0) { return { content: [ { type: "text", text: `No messages available` } ] }; } const content: any = []; let totalLength = 0; let messagesProcessed = 0; while (messagesProcessed < state.messages.length && totalLength < 20000) { const message = state.messages[messagesProcessed]; let currentContent = message.content if (message.type === 'DOM') { currentContent = `DOM: ${message.content}`; } else if (message.type === 'Text') { currentContent = `Text: ${message.content}`; } else if (message.type === 'Interaction') { const interaction = JSON.parse(message.content); delete interaction.eventId; delete interaction.dom; delete interaction.elementUUID; if (interaction.selectors) { interaction.selectors = interaction.selectors.slice(0, 10); } currentContent = JSON.stringify(interaction); } else if (message.type === 'Image') { currentContent = message.content; } totalLength += currentContent.length; const item: any = {} const isImage = message.type === 'Image'; if (isImage) { item.type = "image"; item.data = message.content; item.mimeType = "image/png"; } else { item.type = "text"; item.text = currentContent; } content.push(item); messagesProcessed++; } // Remove processed messages state.messages.splice(0, messagesProcessed); updateState(page, state); const remainingCount = state.messages.length; if (remainingCount > 0) { content.push({ type: "text", text: `Remaining ${remainingCount} messages, please fetch those in next requests.\n` }); } return { content }; } );