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[CHORE] Add Amount#invert mathematical utility function.

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Stefan Thomas
2014-03-22 00:47:41 -07:00
parent 6f5cf8506f
commit 893fc4c168
2 changed files with 35 additions and 0 deletions
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12
test/amount-test.js
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@@ -512,4 +512,16 @@ describe('Amount', function() {
assert.strictEqual(Amount.from_json('2000/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh').ratio_human(Amount.from_json('10/015841551A748AD2C1F76FF6ECB0CCCD00000000/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh'), {reference_date: 443845330 + 31535000}).to_text_full(), '201.0049931765529/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh');
});
});
describe('_invert', function() {
it('Invert 1', function () {
assert.strictEqual(Amount.from_json('1/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh').invert().to_text_full(), '1/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh');
});
it('Invert 20', function () {
assert.strictEqual(Amount.from_json('20/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh').invert().to_text_full(), '0.05/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh');
});
it('Invert 0.02', function () {
assert.strictEqual(Amount.from_json('0.02/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh').invert().to_text_full(), '50/USD/rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh');
});
});
});