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test: refactor test-cli-eval.js
PR-URL: #10898 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>
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‎test/parallel/test-cli-eval.js‎

Lines changed: 75 additions & 74 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
11
'use strict';
22
if (module.parent) {
3-
// signal we've been loaded as a module
3+
// Signal we've been loaded as a module.
4+
// The following console.log() is part of the test.
45
console.log('Loaded as a module, exiting with status code 42.');
56
process.exit(42);
67
}
@@ -9,114 +10,114 @@ const common = require('../common');
910
const assert = require('assert');
1011
const child = require('child_process');
1112
const path = require('path');
12-
const nodejs = '"' + process.execPath + '"';
13+
const nodejs = `"${process.execPath}"`;
1314

15+
// Assert that nothing is written to stdout.
16+
child.exec(`${nodejs} --eval 42`, common.mustCall((err, stdout, stderr) => {
17+
assert.ifError(err);
18+
assert.strictEqual(stdout, '');
19+
assert.strictEqual(stderr, '');
20+
}));
1421

15-
// replace \ by / because windows uses backslashes in paths, but they're still
16-
// interpreted as the escape character when put between quotes.
17-
const filename = __filename.replace(/\\/g, '/');
18-
19-
// assert that nothing is written to stdout
20-
child.exec(nodejs + ' --eval 42',
21-
function(err, stdout, stderr) {
22-
assert.ifError(err);
23-
assert.strictEqual(stdout, '');
24-
assert.strictEqual(stderr, '');
25-
});
26-
27-
// assert that "42\n" is written to stderr
28-
child.exec(nodejs + ' --eval "console.error(42)"',
29-
function(err, stdout, stderr) {
22+
// Assert that "42\n" is written to stderr.
23+
child.exec(`${nodejs} --eval "console.error(42)"`,
24+
common.mustCall((err, stdout, stderr) => {
3025
assert.ifError(err);
3126
assert.strictEqual(stdout, '');
3227
assert.strictEqual(stderr, '42\n');
33-
});
34-
35-
// assert that the expected output is written to stdout
36-
['--print', '-p -e', '-pe', '-p'].forEach(function(s) {
37-
const cmd = nodejs + ' ' + s + ' ';
38-
39-
child.exec(cmd + '42',
40-
function(err, stdout, stderr) {
41-
assert.ifError(err);
42-
assert.strictEqual(stdout, '42\n');
43-
assert.strictEqual(stderr, '');
44-
});
45-
46-
child.exec(cmd + "'[]'", common.mustCall(
47-
function(err, stdout, stderr) {
48-
assert.ifError(err);
49-
assert.strictEqual(stdout, '[]\n');
50-
assert.strictEqual(stderr, '');
51-
}));
28+
}));
29+
30+
// Assert that the expected output is written to stdout.
31+
['--print', '-p -e', '-pe', '-p'].forEach((s) => {
32+
const cmd = `${nodejs} ${s} `;
33+
34+
child.exec(`${cmd}42`, common.mustCall((err, stdout, stderr) => {
35+
assert.ifError(err);
36+
assert.strictEqual(stdout, '42\n');
37+
assert.strictEqual(stderr, '');
38+
}));
39+
40+
child.exec(`${cmd} '[]'`, common.mustCall((err, stdout, stderr) => {
41+
assert.ifError(err);
42+
assert.strictEqual(stdout, '[]\n');
43+
assert.strictEqual(stderr, '');
44+
}));
5245
});
5346

54-
// assert that module loading works
55-
child.exec(nodejs + ' --eval "require(\'' + filename + '\')"',
56-
function(err, stdout, stderr) {
57-
assert.strictEqual(err.code, 42);
58-
assert.strictEqual(
59-
stdout, 'Loaded as a module, exiting with status code 42.\n');
60-
assert.strictEqual(stderr, '');
61-
});
47+
// Assert that module loading works.
48+
{
49+
// Replace \ by / because Windows uses backslashes in paths, but they're still
50+
// interpreted as the escape character when put between quotes.
51+
const filename = __filename.replace(/\\/g, '/');
52+
53+
child.exec(`${nodejs} --eval "require('${filename}')"`,
54+
common.mustCall((err, stdout, stderr) => {
55+
assert.strictEqual(err.code, 42);
56+
assert.strictEqual(
57+
stdout, 'Loaded as a module, exiting with status code 42.\n');
58+
assert.strictEqual(stderr, '');
59+
}));
60+
}
6261

6362
// Check that builtin modules are pre-defined.
64-
child.exec(nodejs + ' --print "os.platform()"',
65-
function(err, stdout, stderr) {
63+
child.exec(`${nodejs} --print "os.platform()"`,
64+
common.mustCall((err, stdout, stderr) => {
6665
assert.ifError(err);
6766
assert.strictEqual(stderr, '');
6867
assert.strictEqual(stdout.trim(), require('os').platform());
69-
});
68+
}));
7069

71-
// module path resolve bug, regression test
72-
child.exec(nodejs + ' --eval "require(\'./test/parallel/test-cli-eval.js\')"',
73-
function(err, stdout, stderr) {
70+
// Module path resolve bug regression test.
71+
child.exec(`${nodejs} --eval "require('./test/parallel/test-cli-eval.js')"`,
72+
common.mustCall((err, stdout, stderr) => {
7473
assert.strictEqual(err.code, 42);
7574
assert.strictEqual(
7675
stdout, 'Loaded as a module, exiting with status code 42.\n');
7776
assert.strictEqual(stderr, '');
78-
});
77+
}));
7978

80-
// Missing argument should not crash
81-
child.exec(nodejs + ' -e', common.mustCall(function(err, stdout, stderr) {
79+
// Missing argument should not crash.
80+
child.exec(`${nodejs} -e`, common.mustCall((err, stdout, stderr) => {
8281
assert.strictEqual(err.code, 9);
8382
assert.strictEqual(stdout, '');
8483
assert.strictEqual(stderr.trim(),
8584
`${process.execPath}: -e requires an argument`);
8685
}));
8786

88-
// empty program should do nothing
89-
child.exec(nodejs + ' -e ""', function(err, stdout, stderr) {
87+
// Empty program should do nothing.
88+
child.exec(`${nodejs} -e ""`, common.mustCall((err, stdout, stderr) => {
9089
assert.ifError(err);
9190
assert.strictEqual(stdout, '');
9291
assert.strictEqual(stderr, '');
93-
});
92+
}));
9493

95-
// "\\-42" should be interpreted as an escaped expression, not a switch
96-
child.exec(nodejs + ' -p "\\-42"',
97-
function(err, stdout, stderr) {
98-
assert.ifError(err);
99-
assert.strictEqual(stdout, '-42\n');
100-
assert.strictEqual(stderr, '');
101-
});
94+
// "\\-42" should be interpreted as an escaped expression, not a switch.
95+
child.exec(`${nodejs} -p "\\-42"`, common.mustCall((err, stdout, stderr) => {
96+
assert.ifError(err);
97+
assert.strictEqual(stdout, '-42\n');
98+
assert.strictEqual(stderr, '');
99+
}));
102100

103-
child.exec(nodejs + ' --use-strict -p process.execArgv',
104-
function(err, stdout, stderr) {
101+
child.exec(`${nodejs} --use-strict -p process.execArgv`,
102+
common.mustCall((err, stdout, stderr) => {
105103
assert.ifError(err);
106104
assert.strictEqual(
107105
stdout, "[ '--use-strict', '-p', 'process.execArgv' ]\n"
108106
);
109107
assert.strictEqual(stderr, '');
110-
});
108+
}));
111109

112-
// Regression test for https://github.com/nodejs/node/issues/3574
113-
const emptyFile = path.join(common.fixturesDir, 'empty.js');
114-
child.exec(nodejs + ` -e 'require("child_process").fork("${emptyFile}")'`,
115-
function(err, stdout, stderr) {
116-
assert.ifError(err);
117-
assert.strictEqual(stdout, '');
118-
assert.strictEqual(stderr, '');
119-
});
110+
// Regression test for https://github.com/nodejs/node/issues/3574.
111+
{
112+
const emptyFile = path.join(common.fixturesDir, 'empty.js');
113+
114+
child.exec(`${nodejs} -e 'require("child_process").fork("${emptyFile}")'`,
115+
common.mustCall((err, stdout, stderr) => {
116+
assert.ifError(err);
117+
assert.strictEqual(stdout, '');
118+
assert.strictEqual(stderr, '');
119+
}));
120+
}
120121

121122
// Regression test for https://github.com/nodejs/node/issues/8534.
122123
{

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