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[TEST] add missing testcases for interest bearing currencies

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- `get_interest_at` by providing a Date object
- `get_interest_at` for a Currency without interest
This commit is contained in:
Geert Weening
2014-11-06 21:38:00 -08:00
parent a8ef614b81
commit a447f6b723
1 changed files with 9 additions and 1 deletions
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10
test/currency-test.js
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@@ -1,6 +1,7 @@
var assert = require('assert'); var assert = require('assert');
var utils = require('./testutils'); var utils = require('./testutils');
var currency = utils.load_module('currency').Currency; var currency = utils.load_module('currency').Currency;
var timeUtil = utils.load_module('utils').time;
describe('Currency', function() { describe('Currency', function() {
describe('json_rewrite', function() { describe('json_rewrite', function() {
@@ -217,14 +218,16 @@ describe('Currency', function() {
return +(Math.round(num + "e+"+precision) + "e-"+precision); return +(Math.round(num + "e+"+precision) + "e-"+precision);
} }
describe('get_interest_at', function() { describe('get_interest_at', function() {
it('returns demurred value for demurrage currency', function() { it('should return demurred value for demurrage currency', function() {
var cur = currency.from_json('015841551A748AD2C1F76FF6ECB0CCCD00000000'); var cur = currency.from_json('015841551A748AD2C1F76FF6ECB0CCCD00000000');
// At start, no demurrage should occur // At start, no demurrage should occur
assert.equal(1, cur.get_interest_at(443845330)); assert.equal(1, cur.get_interest_at(443845330));
assert.equal(1, precision(cur.get_interest_at(new Date(timeUtil.fromRipple(443845330))), 14));
// After one year, 0.5% should have occurred // After one year, 0.5% should have occurred
assert.equal(0.995, precision(cur.get_interest_at(443845330 + 31536000), 14)); assert.equal(0.995, precision(cur.get_interest_at(443845330 + 31536000), 14));
assert.equal(0.995, precision(cur.get_interest_at(new Date(timeUtil.fromRipple(443845330 + 31536000))), 14));
// After one demurrage period, 1/e should have occurred // After one demurrage period, 1/e should have occurred
assert.equal(1/Math.E, cur.get_interest_at(443845330 + 6291418827.05)); assert.equal(1/Math.E, cur.get_interest_at(443845330 + 6291418827.05));
@@ -235,6 +238,11 @@ describe('Currency', function() {
// One demurrage period before start, rate should be e // One demurrage period before start, rate should be e
assert.equal(Math.E, cur.get_interest_at(443845330 - 6291418827.05)); assert.equal(Math.E, cur.get_interest_at(443845330 - 6291418827.05));
}); });
it('should return 0 for currency without interest', function() {
var cur = currency.from_json('USD - US Dollar');
assert.equal(0, cur.get_interest_at(443845330));
assert.equal(0, cur.get_interest_at(443845330 + 31536000));
});
}); });
describe('get_iso', function() { describe('get_iso', function() {
it('should get "XRP" iso_code', function() { it('should get "XRP" iso_code', function() {