module: increase code coverage of cjs loader

test/fixtures/cjs-module-wrap.js

@@ -1,3 +1,4 @@
+'use strict';
 const assert = require('assert');
 const m = require('module');
 

test/fixtures/cjs-module-wrapper.js

@@ -0,0 +1,23 @@
+'use strict';
+const assert = require('assert');
+const m = require('module');
+
+global.mwc = 0;
+
+const originalWrapper = m.wrapper;
+const patchedWrapper = {...m.wrapper};
+
+patchedWrapper[0] += 'global.mwc = (global.mwc || 0 ) + 1';
+
+// Storing original version of wrapper function
+m.wrapper = patchedWrapper;
+
+require('./not-main-module.js');
+
+assert.strictEqual(mwc, 1);
+
+// Restoring original wrapper function
+m.wrapper = originalWrapper;
+// Cleaning require cache
+delete require.cache[require.resolve('./not-main-module.js')];
+delete global.mwc;

test/parallel/test-module-wrap.js

@@ -4,6 +4,6 @@ const fixtures = require('../common/fixtures');
 const { execFileSync } = require('child_process');
 
 const cjsModuleWrapTest = fixtures.path('cjs-module-wrap.js');
-const node = process.argv[0];
+const node = process.execPath;
 
 execFileSync(node, [cjsModuleWrapTest], { stdio: 'pipe' });

test/parallel/test-module-wrapper.js

@@ -0,0 +1,9 @@
+'use strict';
+require('../common');
+const fixtures = require('../common/fixtures');
+const { execFileSync } = require('child_process');
+
+const cjsModuleWrapTest = fixtures.path('cjs-module-wrapper.js');
+const node = process.execPath;
+
+execFileSync(node, [cjsModuleWrapTest], { stdio: 'pipe' });