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>
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@ -122,7 +122,7 @@ function createErrDiff(actual, expected, operator) {
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let a = actualLines[actualLines.length - 1];
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let b = expectedLines[expectedLines.length - 1];
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while (a === b) {
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if (i++ < 2) {
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if (i++ < 3) {
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end = `\n ${a}${end}`;
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} else {
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other = a;
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@ -154,7 +154,9 @@ function createErrDiff(actual, expected, operator) {
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return `${kReadableOperator.notIdentical}\n\n${actualLines.join('\n')}\n`;
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}
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if (i > 3) {
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// There were at least five identical lines at the end. Mark a couple of
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// skipped.
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if (i >= 5) {
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end = `\n${blue}...${white}${end}`;
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skipped = true;
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}
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@ -169,46 +171,46 @@ function createErrDiff(actual, expected, operator) {
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`\n${green}+ actual${white} ${red}- expected${white}`;
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const skippedMsg = ` ${blue}...${white} Lines skipped`;
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let lines = actualLines;
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let plusMinus = `${green}+${white}`;
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let maxLength = expectedLines.length;
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if (actualLines.length < maxLines) {
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lines = expectedLines;
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plusMinus = `${red}-${white}`;
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maxLength = actualLines.length;
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}
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for (i = 0; i < maxLines; i++) {
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if (actualLines.length < i + 1) {
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// If more than one former line is identical, print that. Collapse those
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// in case more than three lines before were identical.
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if (identical > 1) {
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if (maxLength < i + 1) {
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// If more than two former lines are identical, print them. Collapse them
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// in case more than five lines were identical.
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if (identical > 2) {
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if (identical > 3) {
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res += `\n${blue}...${white}`;
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skipped = true;
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} else if (identical > 2) {
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res += `\n ${expectedLines[i - 2]}`;
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if (identical > 4) {
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if (identical === 5) {
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res += `\n ${lines[i - 3]}`;
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printedLines++;
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} else {
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res += `\n${blue}...${white}`;
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skipped = true;
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}
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}
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res += `\n ${lines[i - 2]}`;
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printedLines++;
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}
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res += `\n ${expectedLines[i - 1]}`;
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res += `\n ${lines[i - 1]}`;
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printedLines++;
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}
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// No identical lines before.
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identical = 0;
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// Add the expected line to the cache.
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other += `\n${red}-${white} ${expectedLines[i]}`;
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if (lines === actualLines) {
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res += `\n${plusMinus} ${lines[i]}`;
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} else {
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other += `\n${plusMinus} ${lines[i]}`;
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}
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printedLines++;
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// Only extra actual lines exist
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} else if (expectedLines.length < i + 1) {
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// If more than one former line is identical, print that. Collapse those
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// in case more than three lines before were identical.
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if (identical > 1) {
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if (identical > 3) {
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res += `\n${blue}...${white}`;
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skipped = true;
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} else if (identical > 2) {
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res += `\n ${actualLines[i - 2]}`;
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printedLines++;
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}
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res += `\n ${actualLines[i - 1]}`;
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printedLines++;
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}
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// No identical lines before.
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identical = 0;
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// Add the actual line to the result.
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res += `\n${green}+${white} ${actualLines[i]}`;
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printedLines++;
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// Lines diverge
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} else {
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const expectedLine = expectedLines[i];
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@ -235,13 +237,19 @@ function createErrDiff(actual, expected, operator) {
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actualLine += ',';
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}
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if (divergingLines) {
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// If more than one former line is identical, print that. Collapse those
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// in case more than three lines before were identical.
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if (identical > 1) {
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// If more than two former lines are identical, print them. Collapse
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// them in case more than five lines were identical.
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if (identical > 2) {
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if (identical > 3) {
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res += `\n${blue}...${white}`;
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skipped = true;
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} else if (identical > 2) {
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if (identical > 4) {
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if (identical === 5) {
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res += `\n ${actualLines[i - 3]}`;
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printedLines++;
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} else {
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res += `\n${blue}...${white}`;
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skipped = true;
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}
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}
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res += `\n ${actualLines[i - 2]}`;
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printedLines++;
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}
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@ -264,7 +272,7 @@ function createErrDiff(actual, expected, operator) {
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identical++;
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// The very first identical line since the last diverging line is be
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// added to the result.
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if (identical === 1) {
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if (identical <= 2) {
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res += `\n ${actualLine}`;
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printedLines++;
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}
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@ -53,7 +53,7 @@ assert.throws(
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code: 'ERR_ASSERTION',
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message: `${defaultMsgStartFull} ... Lines skipped\n\n` +
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'+ Uint8Array [\n' +
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'- Buffer [Uint8Array] [\n 120,\n...\n 10\n ]'
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'- Buffer [Uint8Array] [\n 120,\n...\n 122,\n 10\n ]'
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}
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);
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assert.deepEqual(arr, buf);
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@ -66,9 +66,11 @@ assert.deepEqual(arr, buf);
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() => assert.deepStrictEqual(buf2, buf),
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{
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code: 'ERR_ASSERTION',
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message: `${defaultMsgStartFull} ... Lines skipped\n\n` +
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message: `${defaultMsgStartFull}\n\n` +
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' Buffer [Uint8Array] [\n' +
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'...\n' +
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' 120,\n' +
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' 121,\n' +
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' 122,\n' +
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' 10,\n' +
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'+ prop: 1\n' +
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' ]'
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@ -84,9 +86,11 @@ assert.deepEqual(arr, buf);
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() => assert.deepStrictEqual(arr, arr2),
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{
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code: 'ERR_ASSERTION',
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message: `${defaultMsgStartFull} ... Lines skipped\n\n` +
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message: `${defaultMsgStartFull}\n\n` +
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' Uint8Array [\n' +
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'...\n' +
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' 120,\n' +
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' 121,\n' +
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' 122,\n' +
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' 10,\n' +
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'- prop: 5\n' +
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' ]'
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@ -932,17 +936,19 @@ assert.deepStrictEqual(obj1, obj2);
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),
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{
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message: 'Expected values to be strictly deep-equal:\n' +
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'+ actual - expected ... Lines skipped\n' +
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'\n' +
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' Comparison {\n' +
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'...\n' +
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" \"+ foo: 'bar'\\n\" +\n" +
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"+ \"- foo: 'baz.'\\n\" +\n" +
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"- \"- foo: 'baz'\\n\" +\n" +
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" ' }',\n" +
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"+ operator: 'deepStrictEqual'\n" +
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"- operator: 'throws'\n" +
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' }'
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'+ actual - expected ... Lines skipped\n' +
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'\n' +
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' Comparison {\n' +
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" message: 'Expected values to be strictly deep-equal:\\n' +\n" +
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'...\n' +
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" ' [TypeError: foo] {\\n' +\n" +
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" \"+ foo: 'bar'\\n\" +\n" +
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"+ \"- foo: 'baz.'\\n\" +\n" +
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"- \"- foo: 'baz'\\n\" +\n" +
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" ' }',\n" +
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"+ operator: 'deepStrictEqual'\n" +
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"- operator: 'throws'\n" +
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' }'
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}
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);
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}
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@ -482,12 +482,14 @@ assert.throws(
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'',
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' [',
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' [',
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'...',
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' [',
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' 1,',
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' 2,',
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'+ 3',
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"- '3'",
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' ]',
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'...',
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' 4,',
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' 5',
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' ]'].join('\n');
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assert.throws(
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@ -501,10 +503,12 @@ assert.throws(
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' [',
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' 1,',
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'...',
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' 1,',
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' 0,',
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'- 1,',
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' 1,',
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'...',
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' 1,',
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' 1',
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' ]'
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].join('\n');
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@ -521,10 +525,11 @@ assert.throws(
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' [',
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' 1,',
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'...',
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' 1,',
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' 0,',
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'+ 1,',
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' 1,',
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'...',
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' 1,',
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' 1',
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' ]'
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].join('\n');
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// active.
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process.env.TERM = 'FOOBAR';
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delete process.env.NODE_DISABLE_COLORS;
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assert.deepStrictEqual([1, 2, 2, 2], [2, 2, 2, 2]);
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assert.deepStrictEqual([1, 2, 2, 2, 2], [2, 2, 2, 2, 2]);
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} catch (err) {
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const expected = 'Expected values to be strictly deep-equal:\n' +
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'\u001b[32m+ actual\u001b[39m \u001b[31m- expected\u001b[39m' +
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@ -19,6 +19,7 @@ try {
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'\u001b[31m-\u001b[39m 2,\n' +
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' 2,\n' +
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'\u001b[34m...\u001b[39m\n' +
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' 2,\n' +
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' 2\n' +
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' ]';
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assert.strictEqual(err.message, expected);
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