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59 lines
2.0 KiB
JavaScript

5 years ago
'use strict';
var assign = require('core-js/library/fn/object/assign');
var ContextTraversal = require('power-assert-context-traversal');
var LegacyContextTraversal = require('./legacy-context-traversal');
var StringWriter = require('./string-writer');
var defaultOptions = require('./default-options');
var reduce = require('core-js/library/fn/array/reduce');
/**
* options.reducers [array]
* options.renderers [array]
* options.outputOffset [number]
* options.lineSeparator [string]
* options.legacy [boolean]
*/
function createFormatter (options) {
var formatterConfig = assign({}, defaultOptions(), options);
var reducers = formatterConfig.reducers || [];
var rendererConfigs = formatterConfig.renderers;
var len = rendererConfigs.length;
return function (powerAssertContext) {
var context = reduce(reducers, function (prevContext, reducer) {
return reducer(prevContext);
}, powerAssertContext);
var writer = new StringWriter(formatterConfig);
var traversal;
if (formatterConfig.legacy) {
traversal = new LegacyContextTraversal(context);
traversal.setWritable(writer);
} else {
traversal = new ContextTraversal(context);
}
for (var i = 0; i < len; i += 1) {
var RendererClass;
var renderer;
var config = rendererConfigs[i];
if (typeof config === 'object') {
RendererClass = config.ctor;
renderer = new RendererClass(config.options);
} else if (typeof config === 'function') {
RendererClass = config;
renderer = new RendererClass();
}
renderer.init(traversal);
if (typeof renderer.setWritable === 'function') {
renderer.setWritable(writer);
}
}
traversal.traverse();
writer.write('');
return writer.toString();
};
}
createFormatter.StringWriter = StringWriter;
module.exports = createFormatter;