tests: add test for zero config

test/stats/stats.test.js

@@ -3,8 +3,6 @@
 const { run } = require('../utils/test-utils');
 
 describe('stats flag', () => {
-    // {
-    //     StatsGroup.validOptions().map(option => {
     it('should accept stats "none"', () => {
         const { stderr, stdout } = run(__dirname, ['--stats', 'none']);
         expect(stderr).toBeFalsy();

test/zero-config/entry-absent/zero-config.test.js

@@ -0,0 +1,10 @@
+const { run } = require('../../utils/test-utils');
+
+describe('Zero Config tests', () => {
+    it('runs when config and entry are both absent', () => {
+        const { stdout, stderr } = run(__dirname, [], false);
+        // Entry file is absent, should log the Error from the compiler
+        expect(stdout).toContain("Error: Can't resolve './src'");
+        expect(stderr).toBeFalsy();
+    });
+});

test/zero-config/entry-present/src/index.js

@@ -0,0 +1 @@
+console.log("Shoyo")

test/zero-config/entry-present/zero-config.test.js

@@ -0,0 +1,16 @@
+const fs = require('fs');
+const path = require('path');
+const { run } = require('../../utils/test-utils');
+
+describe('Zero Config tests', () => {
+    it('runs when no config is supplied but entry is present', () => {
+        const { stdout, stderr } = run(__dirname, [], false);
+        // Should be able to find the entry file
+        expect(stdout).toContain('./src/index.js');
+        // Should output at the default output dir and filename
+        expect(stdout).toContain('Entrypoint main = main.js');
+        // check that the output file exists
+        expect(fs.existsSync(path.join(__dirname, '/dist/main.js'))).toBeTruthy();
+        expect(stderr).toBeFalsy();
+    });
+});

test/zero-config/with-config/index.js

@@ -0,0 +1 @@
+console.log("Naruto")

test/zero-config/with-config/webpack.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+    mode: 'development',
+    output: {
+        filename: 'test-output.js',
+    },
+};

test/zero-config/with-config/zero-config-entry.test.js

@@ -0,0 +1,16 @@
+const fs = require('fs');
+const path = require('path');
+const { run } = require('../../utils/test-utils');
+
+describe('Zero Config', () => {
+    it('runs when config is present but not supplied via flag', () => {
+        const { stdout, stderr } = run(__dirname, [], false);
+        // default entry should be used
+        expect(stdout).toContain('./index.js');
+        // should pick up the output path from config
+        expect(stdout).toContain('Entrypoint main = test-output');
+        // check that the output file exists
+        expect(fs.existsSync(path.join(__dirname, '/dist/test-output.js'))).toBeTruthy();
+        expect(stderr).toBeFalsy();
+    });
+});