Source factorio dir from config-host.json in tests

If a factorio dir is configured in config-host.json then use that in the
tests.  This removes the requirement of having a factorio installation
in ./factorio or linking to one there when running the tests.

test/integration/export.js

@@ -5,12 +5,14 @@ const path = require("path");
 const { _exportLocale } = require("@clusterio/host/dist/node/src/export");
 const { FactorioServer } = require("@clusterio/host/dist/node/src/server");
 
+const { factorioDir } = require("./index");
+
 
 describe("Integration of lib/factorio/export", function() {
 	describe("exportLocale()", function() {
 		it("returns a nested Map with base game locale information", async function() {
 			let writePath = path.join("temp", "test", "server");
-			let testServer = new FactorioServer("factorio", writePath, {});
+			let testServer = new FactorioServer(factorioDir, writePath, {});
 			await testServer.init();
 
 			let locale = await _exportLocale(testServer, new Map(), ["base"], "en");

test/integration/index.js

@@ -126,15 +126,35 @@ async function get(urlPath) {
 	return res;
 }
 
+function loadJSON(filePath) {
+	try {
+		// eslint-disable-next-line node/no-sync
+		return JSON.parse(fs.readFileSync(filePath, "utf8"));
+	} catch (err) {
+		if (err.code === "ENOENT") {
+			return undefined;
+		}
+		throw err;
+	}
+}
+
+function getFactorioDir(hostConfig) {
+	const factorioDir = hostConfig?.["host.factorio_directory"] ?? "factorio";
+	return path.join(factorioDir);
+}
+
 let controllerProcess;
 let hostProcess;
 let control;
 
+const baseHostConfig = loadJSON("config-host.json");
+
 let url = "https://localhost:4443/";
 let controlToken = jwt.sign({ aud: "user", user: "test" }, Buffer.from("TestSecretDoNotUse", "base64"));
 let instancesDir = path.join("temp", "test", "instances");
 let modsDir = path.join("temp", "test", "mods");
 let databaseDir = path.join("temp", "test", "database");
+let factorioDir = getFactorioDir(baseHostConfig);
 let pluginListPath = path.join("temp", "test", "plugin-list.json");
 let controllerConfigPath = path.join("temp", "test", "config-controller.json");
 let hostConfigPath = path.join("temp", "test", "config-host.json");
@@ -274,7 +294,9 @@ before(async function() {
 	controllerProcess = await spawn("controller:", "node ../../packages/controller run", /Started controller/);
 
 	await execCtl("host create-config --id 4 --name host --generate-token");
-	await exec(`node ../../packages/host config set host.factorio_directory ${path.join("..", "..", "factorio")}`);
+
+	const relativeFactorioDir = path.isAbsolute(factorioDir) ? factorioDir : path.join("..", "..", factorioDir);
+	await exec(`node ../../packages/host config set host.factorio_directory ${relativeFactorioDir}`);
 	await exec("node ../../packages/host config set host.tls_ca ../../test/file/tls/cert.pem");
 
 	hostProcess = await spawn("host:", "node ../../packages/host run", /Started host/);
@@ -338,6 +360,7 @@ module.exports = {
 	instancesDir,
 	modsDir,
 	databaseDir,
+	factorioDir,
 	controllerConfigPath,
 	hostConfigPath,
 	controlConfigPath,

test/integration/server.js

@@ -8,13 +8,13 @@ const lib = require("@clusterio/lib");
 const { FactorioServer, _getVersion } = require("@clusterio/host/dist/node/src/server");
 const { logger } = lib;
 
-const { slowTest } = require("./index");
+const { slowTest, factorioDir } = require("./index");
 
 
 describe("Integration of host/src/server", function() {
 	describe("_getVersion()", function() {
 		it("should get a version from factorio's changelog.txt", async function() {
-			let version = await _getVersion(path.join("factorio", "data", "changelog.txt"));
+			let version = await _getVersion(path.join(factorioDir, "data", "changelog.txt"));
 			if (!/^\d+\.\d+\.\d+$/.test(version)) {
 				assert.fail(`Detected version '${version}' does not followed the format x.y.z`);
 			}
@@ -23,7 +23,7 @@ describe("Integration of host/src/server", function() {
 
 	describe("class FactorioServer", function() {
 		let writePath = path.join("temp", "test", "integration");
-		let server = new FactorioServer("factorio", writePath, {});
+		let server = new FactorioServer(factorioDir, writePath, {});
 		let logFile;
 
 		before(async function() {