e3a013ae99
Currently, jasmine's pretty printer traverses objects to 40 levels of nesting. If an object is more deeply nested than that, an exception is thrown. I find that after a few levels of nesting, the output becomes difficult to read. The process of serializing such deep objects also sometimes crashes the browser or causes a 'slow script' warning. This commit exposes a 'MAX_PRETTY_PRINT_DEPTH' option. It also causes the pretty printer to skip over parts of an object that are nested to deeply by simply printing out 'Object' or 'Array', rather than throwing an exception.
131 lines
3.7 KiB
JavaScript
131 lines
3.7 KiB
JavaScript
/**
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* Base class for pretty printing for expectation results.
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*/
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jasmine.PrettyPrinter = function() {
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this.ppNestLevel_ = 0;
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};
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/**
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* Formats a value in a nice, human-readable string.
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*
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* @param value
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*/
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jasmine.PrettyPrinter.prototype.format = function(value) {
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this.ppNestLevel_++;
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try {
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if (value === jasmine.undefined) {
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this.emitScalar('undefined');
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} else if (value === null) {
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this.emitScalar('null');
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} else if (value === jasmine.getGlobal()) {
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this.emitScalar('<global>');
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} else if (value.jasmineToString) {
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this.emitScalar(value.jasmineToString());
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} else if (typeof value === 'string') {
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this.emitString(value);
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} else if (jasmine.isSpy(value)) {
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this.emitScalar("spy on " + value.identity);
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} else if (value instanceof RegExp) {
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this.emitScalar(value.toString());
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} else if (typeof value === 'function') {
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this.emitScalar('Function');
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} else if (typeof value.nodeType === 'number') {
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this.emitScalar('HTMLNode');
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} else if (value instanceof Date) {
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this.emitScalar('Date(' + value + ')');
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} else if (value.__Jasmine_been_here_before__) {
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this.emitScalar('<circular reference: ' + (jasmine.isArray_(value) ? 'Array' : 'Object') + '>');
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} else if (jasmine.isArray_(value) || typeof value == 'object') {
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value.__Jasmine_been_here_before__ = true;
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if (jasmine.isArray_(value)) {
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this.emitArray(value);
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} else {
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this.emitObject(value);
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}
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delete value.__Jasmine_been_here_before__;
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} else {
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this.emitScalar(value.toString());
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}
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} finally {
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this.ppNestLevel_--;
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}
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};
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jasmine.PrettyPrinter.prototype.iterateObject = function(obj, fn) {
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for (var property in obj) {
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if (!obj.hasOwnProperty(property)) continue;
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if (property == '__Jasmine_been_here_before__') continue;
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fn(property, obj.__lookupGetter__ ? (obj.__lookupGetter__(property) !== jasmine.undefined &&
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obj.__lookupGetter__(property) !== null) : false);
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}
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};
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jasmine.PrettyPrinter.prototype.emitArray = jasmine.unimplementedMethod_;
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jasmine.PrettyPrinter.prototype.emitObject = jasmine.unimplementedMethod_;
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jasmine.PrettyPrinter.prototype.emitScalar = jasmine.unimplementedMethod_;
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jasmine.PrettyPrinter.prototype.emitString = jasmine.unimplementedMethod_;
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jasmine.StringPrettyPrinter = function() {
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jasmine.PrettyPrinter.call(this);
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this.string = '';
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};
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jasmine.util.inherit(jasmine.StringPrettyPrinter, jasmine.PrettyPrinter);
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jasmine.StringPrettyPrinter.prototype.emitScalar = function(value) {
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this.append(value);
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};
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jasmine.StringPrettyPrinter.prototype.emitString = function(value) {
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this.append("'" + value + "'");
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};
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jasmine.StringPrettyPrinter.prototype.emitArray = function(array) {
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if (this.ppNestLevel_ > jasmine.MAX_PRETTY_PRINT_DEPTH) {
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this.append("Array");
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return;
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}
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this.append('[ ');
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for (var i = 0; i < array.length; i++) {
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if (i > 0) {
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this.append(', ');
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}
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this.format(array[i]);
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}
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this.append(' ]');
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};
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jasmine.StringPrettyPrinter.prototype.emitObject = function(obj) {
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if (this.ppNestLevel_ > jasmine.MAX_PRETTY_PRINT_DEPTH) {
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this.append("Object");
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return;
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}
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var self = this;
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this.append('{ ');
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var first = true;
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this.iterateObject(obj, function(property, isGetter) {
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if (first) {
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first = false;
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} else {
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self.append(', ');
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}
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self.append(property);
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self.append(' : ');
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if (isGetter) {
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self.append('<getter>');
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} else {
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self.format(obj[property]);
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}
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});
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this.append(' }');
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};
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jasmine.StringPrettyPrinter.prototype.append = function(value) {
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this.string += value;
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};
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