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have Base generate the strings for error messages immediately #3075

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merged 3 commits into from
Dec 7, 2017
+38 −8
Merged

have Base generate the strings for error messages immediately #3075

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09226eb
have Base generate the strings for error messages immediately instead…
abrady0 Oct 20, 2017
760b4db
re-add stringify during list to appease tests, open for discussion if…
abrady0 Oct 20, 2017
24b65e8
Merge branch 'master' into master
boneskull Dec 7, 2017
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24 changes: 16 additions & 8 deletions lib/reporters/base.js
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,17 @@ exports.cursor = {
}
};

function showDiff (err) {
return err && err.showDiff !== false && sameType(err.actual, err.expected) && err.expected !== undefined;
}

function stringifyDiffObjs (err) {
if (!utils.isString(err.actual) || !utils.isString(err.expected)) {
err.actual = utils.stringify(err.actual);
err.expected = utils.stringify(err.expected);
}
}

/**
* Output the given `failures` as a list.
*
Expand Down Expand Up @@ -183,8 +194,6 @@ exports.list = function (failures) {
}
var stack = err.stack || message;
var index = message ? stack.indexOf(message) : -1;
var actual = err.actual;
var expected = err.expected;

if (index === -1) {
msg = message;
Expand All @@ -200,12 +209,8 @@ exports.list = function (failures) {
msg = 'Uncaught ' + msg;
}
// explicitly show diff
if (err.showDiff !== false && sameType(actual, expected) && expected !== undefined) {
if (!(utils.isString(actual) && utils.isString(expected))) {
err.actual = actual = utils.stringify(actual);
err.expected = expected = utils.stringify(expected);
}

if (showDiff(err)) {
stringifyDiffObjs(err);
fmt = color('error title', ' %s) %s:\n%s') + color('error stack', '\n%s\n');
var match = message.match(/^([^:]+): expected/);
msg = '\n ' + color('error message', match ? match[1] : msg);
Expand Down Expand Up @@ -290,6 +295,9 @@ function Base (runner) {
runner.on('fail', function (test, err) {
stats.failures = stats.failures || 0;
stats.failures++;
if (showDiff(err)) {
stringifyDiffObjs(err);
}
test.err = err;
failures.push(test);
});
Expand Down
22 changes: 22 additions & 0 deletions test/reporters/list.spec.js
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Original file line number Diff line number Diff line change
Expand Up @@ -192,6 +192,28 @@ describe('List reporter', function () {

Base.cursor = cachedCursor;
});
it('should immediately construct fail strings', function () {
var actual = { a: 'actual' };
var expected = { a: 'expected' };
var test = {};
var checked = false;
var err;
runner.on = function (event, callback) {
if (!checked && event === 'fail') {
err = new Error('fake failure object with actual/expected');
err.actual = actual;
err.expected = expected;
err.showDiff = true;
callback(test, err);
checked = true;
}
};
List.call({epilogue: function () {}}, runner);

process.stdout.write = stdoutWrite;
expect(typeof err.actual).to.equal('string');
expect(typeof err.expected).to.equal('string');
});
});

describe('on end', function () {
Expand Down