Fail when specified config is wrong or json is specified

Author: TrySound

lib/svgo-node.js

@@ -9,11 +9,6 @@ const {
 } = require('./svgo.js');
 
 const importConfig = async configFile => {
-  try {
-    await fs.promises.access(configFile);
-  } catch {
-    return null;
-  }
   const config = require(configFile);
   if (config == null || typeof config !== 'object' || Array.isArray(config)) {
     throw Error(`Invalid config file "${configFile}"`);

lib/svgo/coa.js

@@ -34,7 +34,7 @@ module.exports = function makeProgram(program) {
         .option('-f, --folder <FOLDER>', 'Input folder, optimize and rewrite all *.svg files')
         .option('-o, --output <OUTPUT...>', 'Output file or folder (by default the same as the input), "-" for STDOUT')
         .option('-p, --precision <INTEGER>', 'Set number of digits in the fractional part, overrides plugins params')
-        .option('--config <CONFIG>', 'Config file or JSON string to extend or replace default')
+        .option('--config <CONFIG>', 'Custom config file, only .js is supported')
         .option('--datauri <FORMAT>', 'Output as Data URI string (base64), URI encoded (enc) or unencoded (unenc)')
         .option('--multipass', 'Pass over SVGs multiple times to ensure all optimizations are applied')
         .option('--pretty', 'Make SVG pretty printed')

test/config/_index.js

@@ -206,16 +206,20 @@ describe('config', function() {
       );
       expect(config).to.deep.equal({ plugins: [] });
     });
-    it('gives null module does not exist', async () => {
-      const absoluteConfig = await loadConfig(
-        path.join(process.cwd(), './test/config/fixtures/config.js'),
-      );
-      expect(absoluteConfig).to.equal(null);
-      const searchedConfig = await loadConfig(
+    it('gives null when config is not found', async () => {
+      const config = await loadConfig(
         null,
         path.join(process.cwd(), './test/config'),
       );
-      expect(searchedConfig).to.equal(null);
+      expect(config).to.equal(null);
+    });
+    it('is failed when specified config does not exist', async () => {
+      try {
+        await loadConfig("{}");
+        expect.fail('Config is loaded successfully');
+      } catch (error) {
+        expect(error.message).to.match(/Cannot find module/);
+      }
     });
     it('is failed to load when module exports not an object', async () => {
       try {