feat: add google maps mcp source (#125)

apps/freya-backend/src/google-maps/provider.test.ts

@@ -0,0 +1,55 @@
+import type { GoogleMapsSourceOptions } from "@freya/source-google-maps"
+
+import { describe, expect, test } from "bun:test"
+
+import { GoogleMapsSourceProvider } from "./provider.ts"
+
+type McpClient = NonNullable<GoogleMapsSourceOptions["client"]>
+
+class MockMcpClient implements McpClient {
+	async listTools(): ReturnType<McpClient["listTools"]> {
+		return { tools: [] }
+	}
+
+	async readResource(
+		_params: Parameters<McpClient["readResource"]>[0],
+	): ReturnType<McpClient["readResource"]> {
+		throw new Error("unexpected resource read")
+	}
+
+	async callTool(_params: Parameters<McpClient["callTool"]>[0]): ReturnType<McpClient["callTool"]> {
+		return { structuredContent: {} }
+	}
+}
+
+describe("GoogleMapsSourceProvider", () => {
+	test("sourceId is freya.google-maps", () => {
+		const provider = new GoogleMapsSourceProvider({ apiKey: "key" })
+		expect(provider.sourceId).toBe("freya.google-maps")
+	})
+
+	test("throws when service API key is empty", () => {
+		expect(() => new GoogleMapsSourceProvider({ apiKey: "" })).toThrow(
+			"Google Maps MCP API key must be configured",
+		)
+	})
+
+	test("returns source with service API key", async () => {
+		const provider = new GoogleMapsSourceProvider({ apiKey: "key" })
+
+		const source = await provider.feedSourceForUser("user-1", {}, null)
+
+		expect(source.id).toBe("freya.google-maps")
+	})
+
+	test("allows injected test client with service API key", async () => {
+		const provider = new GoogleMapsSourceProvider({
+			apiKey: "key",
+			client: new MockMcpClient(),
+		})
+
+		const source = await provider.feedSourceForUser("user-1", {}, null)
+
+		expect(source.id).toBe("freya.google-maps")
+	})
+})