assert: print more lines in the error diff

So far consequitive identical lines were collapsed if there were at
least three. Now they are only collapsed from five identical lines on.

This also simplifies the implementation a tiny bit by abstracting some
logic.

PR-URL: https://github.com/nodejs/node/pull/28058
Reviewed-By: Rich Trott <rtrott@gmail.com>
This commit is contained in:
Ruben Bridgewater 2019-06-03 16:05:37 +02:00 committed by Rich Trott
parent e4ec4f2656
commit 81496567e7
4 changed files with 77 additions and 57 deletions

View File

@ -122,7 +122,7 @@ function createErrDiff(actual, expected, operator) {
let a = actualLines[actualLines.length - 1];
let b = expectedLines[expectedLines.length - 1];
while (a === b) {
if (i++ < 2) {
if (i++ < 3) {
end = `\n ${a}${end}`;
} else {
other = a;
@ -154,7 +154,9 @@ function createErrDiff(actual, expected, operator) {
return `${kReadableOperator.notIdentical}\n\n${actualLines.join('\n')}\n`;
}
if (i > 3) {
// There were at least five identical lines at the end. Mark a couple of
// skipped.
if (i >= 5) {
end = `\n${blue}...${white}${end}`;
skipped = true;
}
@ -169,46 +171,46 @@ function createErrDiff(actual, expected, operator) {
`\n${green}+ actual${white} ${red}- expected${white}`;
const skippedMsg = ` ${blue}...${white} Lines skipped`;
let lines = actualLines;
let plusMinus = `${green}+${white}`;
let maxLength = expectedLines.length;
if (actualLines.length < maxLines) {
lines = expectedLines;
plusMinus = `${red}-${white}`;
maxLength = actualLines.length;
}
for (i = 0; i < maxLines; i++) {
if (actualLines.length < i + 1) {
// If more than one former line is identical, print that. Collapse those
// in case more than three lines before were identical.
if (identical > 1) {
if (maxLength < i + 1) {
// If more than two former lines are identical, print them. Collapse them
// in case more than five lines were identical.
if (identical > 2) {
if (identical > 3) {
res += `\n${blue}...${white}`;
skipped = true;
} else if (identical > 2) {
res += `\n ${expectedLines[i - 2]}`;
if (identical > 4) {
if (identical === 5) {
res += `\n ${lines[i - 3]}`;
printedLines++;
} else {
res += `\n${blue}...${white}`;
skipped = true;
}
}
res += `\n ${lines[i - 2]}`;
printedLines++;
}
res += `\n ${expectedLines[i - 1]}`;
res += `\n ${lines[i - 1]}`;
printedLines++;
}
// No identical lines before.
identical = 0;
// Add the expected line to the cache.
other += `\n${red}-${white} ${expectedLines[i]}`;
if (lines === actualLines) {
res += `\n${plusMinus} ${lines[i]}`;
} else {
other += `\n${plusMinus} ${lines[i]}`;
}
printedLines++;
// Only extra actual lines exist
} else if (expectedLines.length < i + 1) {
// If more than one former line is identical, print that. Collapse those
// in case more than three lines before were identical.
if (identical > 1) {
if (identical > 3) {
res += `\n${blue}...${white}`;
skipped = true;
} else if (identical > 2) {
res += `\n ${actualLines[i - 2]}`;
printedLines++;
}
res += `\n ${actualLines[i - 1]}`;
printedLines++;
}
// No identical lines before.
identical = 0;
// Add the actual line to the result.
res += `\n${green}+${white} ${actualLines[i]}`;
printedLines++;
// Lines diverge
} else {
const expectedLine = expectedLines[i];
@ -235,13 +237,19 @@ function createErrDiff(actual, expected, operator) {
actualLine += ',';
}
if (divergingLines) {
// If more than one former line is identical, print that. Collapse those
// in case more than three lines before were identical.
if (identical > 1) {
// If more than two former lines are identical, print them. Collapse
// them in case more than five lines were identical.
if (identical > 2) {
if (identical > 3) {
res += `\n${blue}...${white}`;
skipped = true;
} else if (identical > 2) {
if (identical > 4) {
if (identical === 5) {
res += `\n ${actualLines[i - 3]}`;
printedLines++;
} else {
res += `\n${blue}...${white}`;
skipped = true;
}
}
res += `\n ${actualLines[i - 2]}`;
printedLines++;
}
@ -264,7 +272,7 @@ function createErrDiff(actual, expected, operator) {
identical++;
// The very first identical line since the last diverging line is be
// added to the result.
if (identical === 1) {
if (identical <= 2) {
res += `\n ${actualLine}`;
printedLines++;
}

View File

@ -53,7 +53,7 @@ assert.throws(
code: 'ERR_ASSERTION',
message: `${defaultMsgStartFull} ... Lines skipped\n\n` +
'+ Uint8Array [\n' +
'- Buffer [Uint8Array] [\n 120,\n...\n 10\n ]'
'- Buffer [Uint8Array] [\n 120,\n...\n 122,\n 10\n ]'
}
);
assert.deepEqual(arr, buf);
@ -66,9 +66,11 @@ assert.deepEqual(arr, buf);
() => assert.deepStrictEqual(buf2, buf),
{
code: 'ERR_ASSERTION',
message: `${defaultMsgStartFull} ... Lines skipped\n\n` +
message: `${defaultMsgStartFull}\n\n` +
' Buffer [Uint8Array] [\n' +
'...\n' +
' 120,\n' +
' 121,\n' +
' 122,\n' +
' 10,\n' +
'+ prop: 1\n' +
' ]'
@ -84,9 +86,11 @@ assert.deepEqual(arr, buf);
() => assert.deepStrictEqual(arr, arr2),
{
code: 'ERR_ASSERTION',
message: `${defaultMsgStartFull} ... Lines skipped\n\n` +
message: `${defaultMsgStartFull}\n\n` +
' Uint8Array [\n' +
'...\n' +
' 120,\n' +
' 121,\n' +
' 122,\n' +
' 10,\n' +
'- prop: 5\n' +
' ]'
@ -932,17 +936,19 @@ assert.deepStrictEqual(obj1, obj2);
),
{
message: 'Expected values to be strictly deep-equal:\n' +
'+ actual - expected ... Lines skipped\n' +
'\n' +
' Comparison {\n' +
'...\n' +
" \"+ foo: 'bar'\\n\" +\n" +
"+ \"- foo: 'baz.'\\n\" +\n" +
"- \"- foo: 'baz'\\n\" +\n" +
" ' }',\n" +
"+ operator: 'deepStrictEqual'\n" +
"- operator: 'throws'\n" +
' }'
'+ actual - expected ... Lines skipped\n' +
'\n' +
' Comparison {\n' +
" message: 'Expected values to be strictly deep-equal:\\n' +\n" +
'...\n' +
" ' [TypeError: foo] {\\n' +\n" +
" \"+ foo: 'bar'\\n\" +\n" +
"+ \"- foo: 'baz.'\\n\" +\n" +
"- \"- foo: 'baz'\\n\" +\n" +
" ' }',\n" +
"+ operator: 'deepStrictEqual'\n" +
"- operator: 'throws'\n" +
' }'
}
);
}

View File

@ -482,12 +482,14 @@ assert.throws(
'',
' [',
' [',
'...',
' [',
' 1,',
' 2,',
'+ 3',
"- '3'",
' ]',
'...',
' 4,',
' 5',
' ]'].join('\n');
assert.throws(
@ -501,10 +503,12 @@ assert.throws(
' [',
' 1,',
'...',
' 1,',
' 0,',
'- 1,',
' 1,',
'...',
' 1,',
' 1',
' ]'
].join('\n');
@ -521,10 +525,11 @@ assert.throws(
' [',
' 1,',
'...',
' 1,',
' 0,',
'+ 1,',
' 1,',
'...',
' 1,',
' 1',
' ]'
].join('\n');

View File

@ -9,7 +9,7 @@ try {
// active.
process.env.TERM = 'FOOBAR';
delete process.env.NODE_DISABLE_COLORS;
assert.deepStrictEqual([1, 2, 2, 2], [2, 2, 2, 2]);
assert.deepStrictEqual([1, 2, 2, 2, 2], [2, 2, 2, 2, 2]);
} catch (err) {
const expected = 'Expected values to be strictly deep-equal:\n' +
'\u001b[32m+ actual\u001b[39m \u001b[31m- expected\u001b[39m' +
@ -19,6 +19,7 @@ try {
'\u001b[31m-\u001b[39m 2,\n' +
' 2,\n' +
'\u001b[34m...\u001b[39m\n' +
' 2,\n' +
' 2\n' +
' ]';
assert.strictEqual(err.message, expected);