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test: refactor and simplify test-repl-preview
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Use an object to indicate which part belongs to the input and which
to the output.
On top of that this also simplifies the expected output by
automatically inserting the default repl line for previews and by
automatically checking for the correct output line length.

PR-URL: #32154
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
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@BridgeAR @addaleax
BridgeAR authored and addaleax committed Mar 13, 2020
1 parent 9c18ff6 commit e322f74
Showing 1 changed file with 90 additions and 62 deletions.
152 changes: 90 additions & 62 deletions test/parallel/test-repl-preview.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ const common = require('../common');
const assert = require('assert');
const { REPLServer } = require('repl');
const { Stream } = require('stream');
const { inspect } = require('util');

common.skipIfInspectorDisabled();

Expand Down Expand Up @@ -76,84 +77,111 @@ async function tests(options) {
'function koo() { console.log("abc"); }',
'a = undefined;'
]);
const testCases = [
['foo', [2, 4], '[Function: foo]',
'foo',
'\x1B[90m[Function: foo]\x1B[39m\x1B[11G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[36m[Function: foo]\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'],
['koo', [2, 4], '[Function: koo]',
'k\x1B[90moo\x1B[39m\x1B[9G\x1B[0Ko\x1B[90mo\x1B[39m\x1B[10G\x1B[0Ko',
'\x1B[90m[Function: koo]\x1B[39m\x1B[11G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[36m[Function: koo]\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'],
['a', [1, 2], undefined],
[" { b: 1 }['b'] === 1", [2, 6], '\x1B[33mtrue\x1B[39m',
" { b: 1 }['b']",
'\x1B[90m1\x1B[39m\x1B[22G\x1B[1A\x1B[1B\x1B[2K\x1B[1A ',
'\x1B[90m1\x1B[39m\x1B[23G\x1B[1A\x1B[1B\x1B[2K\x1B[1A=== 1',
'\x1B[90mtrue\x1B[39m\x1B[28G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'
],
["{ b: 1 }['b'] === 1;", [2, 7], '\x1B[33mfalse\x1B[39m',
"{ b: 1 }['b']",
'\x1B[90m1\x1B[39m\x1B[21G\x1B[1A\x1B[1B\x1B[2K\x1B[1A ',
'\x1B[90m1\x1B[39m\x1B[22G\x1B[1A\x1B[1B\x1B[2K\x1B[1A=== 1',
'\x1B[90mtrue\x1B[39m\x1B[27G\x1B[1A\x1B[1B\x1B[2K\x1B[1A;',
'\x1B[90mfalse\x1B[39m\x1B[28G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mfalse\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'
],
['{ a: true }', [2, 3], '{ a: \x1B[33mtrue\x1B[39m }',
'{ a: tru\x1B[90me\x1B[39m\x1B[16G\x1B[0Ke }\r',
'{ a: \x1B[33mtrue\x1B[39m }',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'],
['1n + 2n', [2, 5], '\x1B[33m3n\x1B[39m',
'1n + 2',
'\x1B[90mType[39m\x1B[14G\x1B[1A\x1B[1B\x1B[2K\x1B[1An',
'\x1B[90m3n\x1B[39m\x1B[15G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33m3n\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'],
['{ a: true };', [2, 4], '\x1B[33mtrue\x1B[39m',
'{ a: tru\x1B[90me\x1B[39m\x1B[16G\x1B[0Ke };',
'\x1B[90mtrue\x1B[39m\x1B[20G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'],
[' \t { a: true};', [2, 5], '\x1B[33mtrue\x1B[39m',
' { a: tru\x1B[90me\x1B[39m\x1B[18G\x1B[0Ke}',
'\x1B[90m{ a: true }\x1B[39m\x1B[20G\x1B[1A\x1B[1B\x1B[2K\x1B[1A;',
'\x1B[90mtrue\x1B[39m\x1B[21G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'],
['{};1', [2, 4], '\x1B[33m1\x1B[39m',
'{};1',
'\x1B[90m1\x1B[39m\x1B[12G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33m1\x1B[39m',
'\x1B[1G\x1B[0Jrepl > \x1B[8G'

const testCases = [{
input: 'foo',
noPreview: '[Function: foo]',
preview: [
'foo',
'\x1B[90m[Function: foo]\x1B[39m\x1B[11G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[36m[Function: foo]\x1B[39m'
]
}, {
input: 'koo',
noPreview: '[Function: koo]',
preview: [
'k\x1B[90moo\x1B[39m\x1B[9G\x1B[0Ko\x1B[90mo\x1B[39m\x1B[10G\x1B[0Ko',
'\x1B[90m[Function: koo]\x1B[39m\x1B[11G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[36m[Function: koo]\x1B[39m'
]
}, {
input: 'a',
noPreview: 'repl > ', // No "undefined" output.
preview: ['a\r'] // No "undefined" preview.
}, {
input: " { b: 1 }['b'] === 1",
noPreview: '\x1B[33mtrue\x1B[39m',
preview: [
" { b: 1 }['b']",
'\x1B[90m1\x1B[39m\x1B[22G\x1B[1A\x1B[1B\x1B[2K\x1B[1A ',
'\x1B[90m1\x1B[39m\x1B[23G\x1B[1A\x1B[1B\x1B[2K\x1B[1A=== 1',
'\x1B[90mtrue\x1B[39m\x1B[28G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m'
]
}, {
input: "{ b: 1 }['b'] === 1;",
noPreview: '\x1B[33mfalse\x1B[39m',
preview: [
"{ b: 1 }['b']",
'\x1B[90m1\x1B[39m\x1B[21G\x1B[1A\x1B[1B\x1B[2K\x1B[1A ',
'\x1B[90m1\x1B[39m\x1B[22G\x1B[1A\x1B[1B\x1B[2K\x1B[1A=== 1',
'\x1B[90mtrue\x1B[39m\x1B[27G\x1B[1A\x1B[1B\x1B[2K\x1B[1A;',
'\x1B[90mfalse\x1B[39m\x1B[28G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mfalse\x1B[39m'
]
}, {
input: '{ a: true }',
noPreview: '{ a: \x1B[33mtrue\x1B[39m }',
preview: [
'{ a: tru\x1B[90me\x1B[39m\x1B[16G\x1B[0Ke }\r',
'{ a: \x1B[33mtrue\x1B[39m }'
]
}, {
input: '{ a: true };',
noPreview: '\x1B[33mtrue\x1B[39m',
preview: [
'{ a: tru\x1B[90me\x1B[39m\x1B[16G\x1B[0Ke };',
'\x1B[90mtrue\x1B[39m\x1B[20G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m'
]
}, {
input: ' \t { a: true};',
noPreview: '\x1B[33mtrue\x1B[39m',
preview: [
' { a: tru\x1B[90me\x1B[39m\x1B[18G\x1B[0Ke}',
'\x1B[90m{ a: true }\x1B[39m\x1B[20G\x1B[1A\x1B[1B\x1B[2K\x1B[1A;',
'\x1B[90mtrue\x1B[39m\x1B[21G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33mtrue\x1B[39m'
]
}, {
input: '1n + 2n',
noPreview: '\x1B[33m3n\x1B[39m',
preview: [
'1n + 2',
'\x1B[90mType[39m\x1B[14G\x1B[1A\x1B[1B\x1B[2K\x1B[1An',
'\x1B[90m3n\x1B[39m\x1B[15G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33m3n\x1B[39m'
]
}, {
input: '{};1',
noPreview: '\x1B[33m1\x1B[39m',
preview: [
'{};1',
'\x1B[90m1\x1B[39m\x1B[12G\x1B[1A\x1B[1B\x1B[2K\x1B[1A\r',
'\x1B[33m1\x1B[39m'
]
];
}];

const hasPreview = repl.terminal &&
(options.preview !== undefined ? !!options.preview : true);

for (const [input, length, expected, ...preview] of testCases) {
for (const { input, noPreview, preview } of testCases) {
console.log(`Testing ${input}`);

const toBeRun = input.split('\n');
let lines = await runAndWait(toBeRun, repl);

assert.strictEqual(lines.length, length[+hasPreview]);
if (expected === undefined) {
assert(!lines.some((e) => e.includes('undefined')));
} else if (hasPreview) {
if (hasPreview) {
// Remove error messages. That allows the code to run in different
// engines.
// eslint-disable-next-line no-control-regex
lines = lines.map((line) => line.replace(/Error: .+?\x1B/, ''));
assert.strictEqual(lines.pop(), '\x1B[1G\x1B[0Jrepl > \x1B[8G');
assert.deepStrictEqual(lines, preview);
} else {
assert.ok(lines[0].includes(expected), lines);
assert.ok(lines[0].includes(noPreview), lines.map(inspect));
if (preview.length !== 1 || preview[0] !== `${input}\r`)
assert.strictEqual(lines.length, 2);
}
}
}
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