module: increase code coverage of cjs loader

Add test cases to cover uncovered wrap and wrapper getters.

Refs: https://coverage.nodejs.org/coverage-99268b1e996d13a0/lib/internal/modules/cjs/loader.js.html#L153

PR-URL: https://github.com/nodejs/node/pull/27898
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

2 files changed, 24 insertions, 0 deletions

diff --git a/test/fixtures/cjs-module-wrap.js b/test/fixtures/cjs-module-wrap.js
index 2e11cc1a3b..4a3114c5f1 100644
--- a/test/fixtures/cjs-module-wrap.js
+++ b/test/fixtures/cjs-module-wrap.js
@@ -1,3 +1,4 @@
+'use strict';
 const assert = require('assert');
 const m = require('module');
 
diff --git a/test/fixtures/cjs-module-wrapper.js b/test/fixtures/cjs-module-wrapper.js
new file mode 100644
index 0000000000..b4e73682af
--- /dev/null
+++ b/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;