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Currency#to_json should output a format that can be successfully converted back to a Currency object via from_json. So for demurrage currencies it should output the full hex currency code. Currency#to_human on the other hand should always print something a human will understand. For demurrage currencies we'll print the three-letter code for now.
105 lines
4.1 KiB
JavaScript
105 lines
4.1 KiB
JavaScript
var assert = require('assert');
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var utils = require('./testutils');
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var currency = utils.load_module('currency').Currency;
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describe('Currency', function() {
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describe('json_rewrite', function() {
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it('json_rewrite("USD") == "USD"', function() {
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assert.strictEqual('USD', currency.json_rewrite('USD'));
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});
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it('json_rewrite("NaN") == "XRP"', function() {
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assert.strictEqual('XRP', currency.json_rewrite(NaN));
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});
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it('json_rewrite("015841551A748AD2C1F76FF6ECB0CCCD00000000") == "015841551A748AD2C1F76FF6ECB0CCCD00000000"', function() {
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assert.strictEqual(currency.json_rewrite("015841551A748AD2C1F76FF6ECB0CCCD00000000"),
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'015841551A748AD2C1F76FF6ECB0CCCD00000000');
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});
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});
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describe('from_json', function() {
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it('from_json(NaN).to_json() == "XRP"', function() {
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var r = currency.from_json(NaN);
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assert(!r.is_valid());
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assert.strictEqual('XRP', r.to_json());
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});
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it('from_json("XRP").to_json() == "XRP"', function() {
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var r = currency.from_json('XRP');
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assert(r.is_valid());
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assert(r.is_native());
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assert.strictEqual('XRP', r.to_json());
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});
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});
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describe('to_human', function() {
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it('"USD".to_human() == "USD"', function() {
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assert.strictEqual('USD', currency.from_json('USD').to_human());
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});
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it('"NaN".to_human() == "XRP"', function() {
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assert.strictEqual('XRP', currency.from_json(NaN).to_human());
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});
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it('"015841551A748AD2C1F76FF6ECB0CCCD00000000") == "015841551A748AD2C1F76FF6ECB0CCCD00000000"', function() {
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assert.strictEqual(currency.from_json("015841551A748AD2C1F76FF6ECB0CCCD00000000").to_human(),
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'XAU');
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});
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});
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describe('parse_json(currency obj)', function() {
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assert.strictEqual('USD', new currency().parse_json(currency.from_json('USD')).to_json());
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});
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describe('is_valid', function() {
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it('Currency.is_valid("XRP")', function() {
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assert(currency.is_valid('XRP'));
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});
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it('!Currency.is_valid(NaN)', function() {
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assert(!currency.is_valid(NaN));
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});
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it('from_json("XRP").is_valid()', function() {
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assert(currency.from_json('XRP').is_valid());
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});
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it('!from_json(NaN).is_valid()', function() {
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assert(!currency.from_json(NaN).is_valid());
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});
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});
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describe('clone', function() {
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it('should clone currency object', function() {
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var c = currency.from_json('XRP');
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assert.strictEqual('XRP', c.clone().to_json());
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});
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});
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describe('to_human', function() {
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it('should generate human string', function() {
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assert.strictEqual('XRP', currency.from_json('XRP').to_human());
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});
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});
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describe('has_interest', function() {
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it('should be true for type 1 currency codes', function() {
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assert(currency.from_hex('015841551A748AD2C1F76FF6ECB0CCCD00000000').has_interest());
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assert(currency.from_json('015841551A748AD2C1F76FF6ECB0CCCD00000000').has_interest());
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});
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it('should be false for type 0 currency codes', function() {
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assert(!currency.from_hex('0000000000000000000000005553440000000000').has_interest());
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assert(!currency.from_json('USD').has_interest());
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});
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});
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function precision(num, precision) {
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return +(Math.round(num + "e+"+precision) + "e-"+precision);
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}
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describe('get_interest_at', function() {
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it('returns demurred value for demurrage currency', function() {
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var cur = currency.from_json('015841551A748AD2C1F76FF6ECB0CCCD00000000');
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// At start, no demurrage should occur
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assert.equal(1, cur.get_interest_at(443845330));
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// After one year, 0.5% should have occurred
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assert.equal(0.995, precision(cur.get_interest_at(443845330 + 31536000), 14));
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// After one demurrage period, 1/e should have occurred
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assert.equal(1/Math.E, cur.get_interest_at(443845330 + 6291418827.05));
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// One year before start, it should be (roughly) 0.5% higher.
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assert.equal(1.005, precision(cur.get_interest_at(443845330 - 31536000), 4));
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// One demurrage period before start, rate should be e
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assert.equal(Math.E, cur.get_interest_at(443845330 - 6291418827.05));
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});
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});
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});
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