ea17a6ace1
100% code coverage for the preconditions module. Usage: ``` $.checkState(something === anotherthing, 'Expected something to be anotherthing'); $.checkArgument(something < 100, 'something', 'must be less than 100'); $.checkArgumentType(something, PrivateKey, 'something'); // The third argument is a helper to mention the name of the argument $.checkArgumentType(something, PrivateKey); // but it's optional (will show up as "(unknown argument)") ```
30 lines
800 B
JavaScript
30 lines
800 B
JavaScript
'use strict';
|
|
|
|
var errors = require('../errors');
|
|
var _ = require('lodash');
|
|
|
|
module.exports = {
|
|
checkState: function(condition, message) {
|
|
if (!condition) {
|
|
throw new errors.InvalidState(message);
|
|
}
|
|
},
|
|
checkArgument: function(condition, argumentName, message) {
|
|
if (!condition) {
|
|
throw new errors.InvalidArgument(argumentName, message);
|
|
}
|
|
},
|
|
checkArgumentType: function(argument, type, argumentName) {
|
|
argumentName = argumentName || '(unknown name)';
|
|
if (_.isString(type)) {
|
|
if (typeof argument !== type) {
|
|
throw new errors.InvalidArgumentType(argument, type, argumentName);
|
|
}
|
|
} else {
|
|
if (!(argument instanceof type)) {
|
|
throw new errors.InvalidArgumentType(argument, type.name, argumentName);
|
|
}
|
|
}
|
|
}
|
|
};
|