test(load-release-rules): limited loading to cjs files

since we dont yet have a solution for loading from esm and are already limited to cjs in other areas

for #296

README.md

@@ -168,14 +168,14 @@ With this configuration:
   "plugins": [
     ["@semantic-release/commit-analyzer", {
       "preset": "angular",
-      "releaseRules": "./config/release-rules.js"
+      "releaseRules": "./config/release-rules.cjs"
     }],
     "@semantic-release/release-notes-generator"
   ]
 }
 ```
 ```js
-// File: config/release-rules.js
+// File: config/release-rules.cjs
 module.exports = [
   {type: 'docs', scope: 'README', release: 'patch'},
   {type: 'refactor', scope: 'core-*', release: 'minor'},

test/fixtures/release-rules-invalid.cjs

@@ -0,0 +1 @@
+module.exports = 42;

test/fixtures/release-rules.cjs

@@ -0,0 +1,6 @@
+module.exports = [
+  {breaking: true, release: 'major'},
+  {type: 'feat', release: 'minor'},
+  {type: 'fix', release: 'patch'},
+  {type: 'perf', release: 'patch'},
+];

test/integration.test.js

@@ -117,7 +117,7 @@ test('Accept a "releaseRules" option that reference a requirable module', async
     {hash: '456', message: 'feat(scope2): Second feature'},
   ];
   const releaseType = await analyzeCommits(
-    {releaseRules: './test/fixtures/release-rules'},
+    {releaseRules: './test/fixtures/release-rules.cjs'},
     {cwd, commits, logger: t.context.logger}
   );
 
@@ -357,7 +357,7 @@ test('Throw error if "releaseRules" is not an Array or a String', async (t) => {
 });
 
 test('Throw error if "releaseRules" option reference a requirable module that is not an Array or a String', async (t) => {
-  await t.throwsAsync(analyzeCommits({releaseRules: './test/fixtures/release-rules-invalid'}, {cwd}), {
+  await t.throwsAsync(analyzeCommits({releaseRules: './test/fixtures/release-rules-invalid.cjs'}, {cwd}), {
     message: /Error in commit-analyzer configuration: "releaseRules" must be an array of rules/,
   });
 });

test/load-release-rules.test.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 import loadReleaseRules from '../lib/load-release-rules.js';
-import testReleaseRules from './fixtures/release-rules.js';
+import testReleaseRules from './fixtures/release-rules.cjs';
 
 const cwd = process.cwd();
 
@@ -11,7 +11,7 @@ test('Accept a "releaseRules" option', (t) => {
 });
 
 test('Accept a "releaseRules" option that reference a requireable module', t => {
-  const releaseRules = loadReleaseRules({releaseRules: './test/fixtures/release-rules'}, {cwd});
+  const releaseRules = loadReleaseRules({releaseRules: './test/fixtures/release-rules.cjs'}, {cwd});
 
   t.deepEqual(releaseRules, testReleaseRules);
 });
@@ -58,7 +58,7 @@ test('Throw error if "releaseRules" is not an Array or a String', (t) => {
 });
 
 test('Throw error if "releaseRules" option reference a requirable module that is not an Array or a String', (t) => {
-  t.throws(() => loadReleaseRules({releaseRules: './test/fixtures/release-rules-invalid'}, {cwd}), {
+  t.throws(() => loadReleaseRules({releaseRules: './test/fixtures/release-rules-invalid.cjs'}, {cwd}), {
     message: /Error in commit-analyzer configuration: "releaseRules" must be an array of rules/,
   });
 });