test: add testcase for SourceTextModule custom inspect

ch1ller0 · targos · commit b5b234deff63 · 2019-05-31T08:46:53.000+02:00
PR-URL: #27889 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
diff --git a/test/parallel/test-vm-module-basic.js b/test/parallel/test-vm-module-basic.js
@@ -5,6 +5,7 @@
 const common = require('../common');
 const assert = require('assert');
 const { SourceTextModule, createContext } = require('vm');
+const util = require('util');
 
 (async function test1() {
 const context = createContext({
@@ -63,3 +64,21 @@ const { SourceTextModule, createContext } = require('vm');
 const m3 = new SourceTextModule('3', { context: context2 });
 assert.strictEqual(m3.url, 'vm:module(0)');
 })();
+
+// Check inspection of the instance
+{
+ const context = createContext({ foo: 'bar' });
+ const m = new SourceTextModule('1', { context });
+
+ assert.strictEqual(
+ util.inspect(m),
+ "SourceTextModule {\n status: 'uninstantiated',\n linkingStatus:" +
+ " 'unlinked',\n url: 'vm:module(0)',\n context: { foo: 'bar' }\n}"
+ );
+ assert.strictEqual(
+ m[util.inspect.custom].call(Object.create(null)),
+ 'SourceTextModule {\n status: undefined,\n linkingStatus: undefined,' +
+ '\n url: undefined,\n context: undefined\n}'
+ );
+ assert.strictEqual(util.inspect(m, { depth: -1 }), '[SourceTextModule]');
+}

-Original file line number
+Diff line change
 constcommon=require('../common');
 constassert=require('assert');
 const{ SourceTextModule, createContext }=require('vm');
 +constutil=require('util');
 (asyncfunctiontest1(){
 constcontext=createContext({
 constm3=newSourceTextModule('3',{context: context2});
 assert.strictEqual(m3.url,'vm:module(0)');
 })();
++
 +// Check inspection of the instance
 +{
 +constcontext=createContext({foo: 'bar'});
 +constm=newSourceTextModule('1',{ context });
++
 +assert.strictEqual(
 +util.inspect(m),
 +"SourceTextModule {\n status: 'uninstantiated',\n linkingStatus:"+
 +" 'unlinked',\n url: 'vm:module(0)',\n context: { foo: 'bar' }\n}"
 +);
 +assert.strictEqual(
 +m[util.inspect.custom].call(Object.create(null)),
 +'SourceTextModule {\n status: undefined,\n linkingStatus: undefined,'+
 +'\n url: undefined,\n context: undefined\n}'
 +);
 +assert.strictEqual(util.inspect(m,{depth: -1}),'[SourceTextModule]');
 +}