Fix wrong BTC sum when adding multiple line items

closes #220

app/components/add-reimbursement/component.js

@@ -74,7 +74,7 @@ export default class AddReimbursementComponent extends Component {
   }
 
   updateTotalAmountFromFiat() {
-    let btcAmount = parseFloat(this.total);
+    let btcAmount = 0;
 
     if (this.exchangeRates.btceur > 0 && this.totalEUR > 0) {
       btcAmount += (this.totalEUR / this.exchangeRates.btceur);

app/components/add-reimbursement/template.hbs

@@ -14,6 +14,7 @@
       <p class="label">Total amount (BTC):</p>
       <p>
         <Input @type="text"
+               @name="total-btc"
                @placeholder="0.0015"
                @value={{this.total}}
                @required={{true}}
@@ -49,7 +50,9 @@
 
     <p class="actions">
       <button {{on "click" this.showExpenseForm}}
-        class="green small" type="button">+ Add another item</button>
+        id="add-another-item" class="green small" type="button">
+        + Add another item
+      </button>
     </p>
   {{else}}
     <p>No line items yet.</p>

tests/integration/components/add-reimbursement/component-test.js

@@ -1,6 +1,6 @@
 import { module, test } from 'qunit';
 import { setupRenderingTest } from 'ember-qunit';
-import { render } from '@ember/test-helpers';
+import { click, fillIn, render } from '@ember/test-helpers';
 import { hbs } from 'ember-cli-htmlbars';
 import contributors from '../../../fixtures/contributors';
 
@@ -22,7 +22,37 @@ module('Integration | Component | add-reimbursement', function(hooks) {
     assert.equal(this.element.querySelector('select#contributor option:checked').value, "3",
       'preselects the connected contributor account');
   });
+
+  test('Adding expense items', async function(assert) {
     await render(hbs`<AddReimbursement />`);
-    assert.ok(true);
+
+    assert.dom(this.element).includesText('New expense item');
+
+    await fillIn('form input[name="expense-amount"]', '49');
+    await fillIn('form input[name="expense-title"]', 'Domain kosmos.org (yearly fee)');
+    await click('form#add-expense-item input[type="submit"]');
+
+    assert.equal(this.element.querySelector('input[name="total-eur"]').value, '49',
+      'updates the total EUR amount');
+    assert.equal(this.element.querySelector('input[name="total-usd"]').value, '0',
+      'does not update the total USD amount');
+    assert.equal(this.element.querySelector('input[name="total-btc"]').value, '0.00534493',
+      'updates the total BTC amount');
+
+    assert.dom(this.element).doesNotIncludeText('New expense item');
+
+    await click('button#add-another-item');
+
+    await fillIn('form input[name="expense-amount"]', '29');
+    await fillIn('select[name="expense-currency"]', 'USD');
+    await fillIn('form input[name="expense-title"]', 'Domain kosmos.social (yearly fee)');
+    await click('form#add-expense-item input[type="submit"]');
+
+    assert.equal(this.element.querySelector('input[name="total-usd"]').value, '29',
+      'updates the total USD amount');
+    assert.equal(this.element.querySelector('input[name="total-eur"]').value, '49',
+      'does not update the total EUR amount');
+    assert.equal(this.element.querySelector('input[name="total-btc"]').value, '0.00804268',
+      'updates the total BTC amount');
   });
 });