Bug 1482689 - Use AddressPicker for the card billing address UI. r=MattN

* New BillingAddressPicker subclass of AddressPicker which just overrides some of the state-related behavior that
* Allow the RichSelect's popupBox (<select>) to be assigned after the constructor
* A couple new mochitests for the new/different behavior
* Update the test to expect 'edit' to be hidden when the empty option is selected

Differential Revision: https://phabricator.services.mozilla.com/D9321

--HG--
extra : moz-landing-system : lando

browser/components/payments/res/components/rich-select.js

@@ -24,10 +24,12 @@ export default class RichSelect extends ObservedPropertiesMixin(HTMLElement) {
   constructor() {
     super();
     this.popupBox = document.createElement("select");
-    this.popupBox.addEventListener("change", this);
   }
 
   connectedCallback() {
+    // the popupBox element may change in between constructor and being connected
+    // so wait until connected before listening to events on it
+    this.popupBox.addEventListener("change", this);
     this.appendChild(this.popupBox);
     this.render();
   }
@@ -74,7 +76,7 @@ export default class RichSelect extends ObservedPropertiesMixin(HTMLElement) {
 
     if (this.value) {
       let optionType = this.getAttribute("option-type");
-      if (selectedRichOption.localName != optionType) {
+      if (!selectedRichOption || selectedRichOption.localName != optionType) {
         selectedRichOption = document.createElement(optionType);
       }
 

browser/components/payments/res/containers/address-picker.js

@@ -33,7 +33,10 @@ export default class AddressPicker extends RichPicker {
 
   attributeChangedCallback(name, oldValue, newValue) {
     super.attributeChangedCallback(name, oldValue, newValue);
-    if (AddressPicker.pickerAttributes.includes(name) && oldValue !== newValue) {
+    // connectedCallback may add and adjust elements & values
+    // so avoid calling render before the element is connected
+    if (this.isConnected &&
+        AddressPicker.pickerAttributes.includes(name) && oldValue !== newValue) {
       this.render(this.requestStore.getState());
     }
   }
@@ -89,7 +92,26 @@ export default class AddressPicker extends RichPicker {
     return result;
   }
 
+  get options() {
+    return this.dropdown.popupBox.options;
+  }
+
+  /**
+   * @param {object} state - See `PaymentsStore.setState`
+   * The value of the picker is retrieved from state store rather than the DOM
+   * @returns {string} guid
+   */
+  getCurrentValue(state) {
+    let [selectedKey, selectedLeaf] = this.selectedStateKey.split("|");
+    let guid = state[selectedKey];
+    if (selectedLeaf) {
+      guid = guid[selectedLeaf];
+    }
+    return guid;
+  }
+
   render(state) {
+    let selectedAddressGUID = this.getCurrentValue(state) || "";
     let addresses = paymentRequest.getAddresses(state);
     let desiredOptions = [];
     let filteredAddresses = this.filterAddresses(addresses, this.fieldNames);
@@ -131,12 +153,18 @@ export default class AddressPicker extends RichPicker {
     }
 
     this.dropdown.popupBox.textContent = "";
+
+    if (this._allowEmptyOption) {
+      let optionEl = document.createElement("option");
+      optionEl.value = "";
+      desiredOptions.unshift(optionEl);
+    }
+
     for (let option of desiredOptions) {
       this.dropdown.popupBox.appendChild(option);
     }
 
     // Update selectedness after the options are updated
-    let selectedAddressGUID = state[this.selectedStateKey];
     this.dropdown.value = selectedAddressGUID;
 
     if (selectedAddressGUID && selectedAddressGUID !== this.dropdown.value) {
@@ -161,8 +189,8 @@ export default class AddressPicker extends RichPicker {
       return "";
     }
 
-    let merchantFieldErrors = AddressForm.merchantFieldErrorsForForm(state,
+    let merchantFieldErrors = AddressForm.merchantFieldErrorsForForm(
-                                                                     [this.selectedStateKey]);
+          state, this.selectedStateKey.split("|"));
     // TODO: errors in priority order.
     return Object.values(merchantFieldErrors).find(msg => {
       return typeof(msg) == "string" && msg.length;
@@ -182,12 +210,23 @@ export default class AddressPicker extends RichPicker {
   }
 
   onChange(event) {
-    let selectedKey = this.selectedStateKey;
+    let [selectedKey, selectedLeaf] = this.selectedStateKey.split("|");
-    if (selectedKey) {
+    if (!selectedKey) {
-      this.requestStore.setState({
+      return;
-        [selectedKey]: this.dropdown.value,
-      });
     }
+    // selectedStateKey can be a '|' delimited string indicating a path into the state object
+    // to update with the new value
+    let newState = {};
+
+    if (selectedLeaf) {
+      let currentState = this.requestStore.getState();
+      newState[selectedKey] = Object.assign({},
+                                            currentState[selectedKey],
+                                            { [selectedLeaf]: this.dropdown.value });
+    } else {
+      newState[selectedKey] = this.dropdown.value;
+    }
+    this.requestStore.setState(newState);
   }
 
   onClick({target}) {
@@ -197,7 +236,7 @@ export default class AddressPicker extends RichPicker {
       },
       "address-page": {
         addressFields: this.getAttribute("address-fields"),
-        selectedStateKey: [this.selectedStateKey],
+        selectedStateKey: this.selectedStateKey.split("|"),
       },
     };
 
@@ -208,9 +247,8 @@ export default class AddressPicker extends RichPicker {
         break;
       }
       case this.editLink: {
-        let state = this.requestStore.getState();
+        let currentState = this.requestStore.getState();
-        let selectedAddressGUID = state[this.selectedStateKey];
+        nextState["address-page"].guid = this.getCurrentValue(currentState);
-        nextState["address-page"].guid = selectedAddressGUID;
         nextState["address-page"].title = this.dataset.editAddressTitle;
         break;
       }

browser/components/payments/res/containers/basic-card-form.css

@@ -31,11 +31,6 @@ basic-card-form .editCreditCardForm .persist-checkbox {
   display: grid;
 }
 
-#billingAddressGUID {
-  /* XXX: temporary until converted to a rich-picker in bug 1482689 */
-  margin: 14px 0;
-}
-
 basic-card-form > footer > .cancel-button {
   /* When cancel is shown (during onboarding), it should always be on the left with a space after it */
   margin-right: auto;

browser/components/payments/res/containers/basic-card-form.js

@@ -4,6 +4,7 @@
 
 /* import-globals-from ../../../../../browser/extensions/formautofill/content/autofillEditForms.js*/
 import AcceptedCards from "../components/accepted-cards.js";
+import BillingAddressPicker from "./billing-address-picker.js";
 import CscInput from "../components/csc-input.js";
 import LabelledCheckbox from "../components/labelled-checkbox.js";
 import PaymentRequestPage from "../components/payment-request-page.js";
@@ -27,15 +28,6 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
     this.genericErrorText.setAttribute("aria-live", "polite");
     this.genericErrorText.classList.add("page-error");
 
-    this.addressAddLink = document.createElement("a");
-    this.addressAddLink.className = "add-link";
-    this.addressAddLink.href = "javascript:void(0)";
-    this.addressAddLink.addEventListener("click", this);
-    this.addressEditLink = document.createElement("a");
-    this.addressEditLink.className = "edit-link";
-    this.addressEditLink.href = "javascript:void(0)";
-    this.addressEditLink.addEventListener("click", this);
-
     this.cscInput = new CscInput({
       useAlwaysVisiblePlaceholder: true,
       inputId: "cc-csc",
@@ -85,6 +77,38 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
     });
   }
 
+  _upgradeBillingAddressPicker() {
+    let addressRow = this.form.querySelector(".billingAddressRow");
+    let addressPicker = this.billingAddressPicker = new BillingAddressPicker();
+
+    // Wrap the existing <select> that the formHandler manages
+    if (addressPicker.dropdown.popupBox) {
+      addressPicker.dropdown.popupBox.remove();
+    }
+    addressPicker.dropdown.popupBox = this.form.querySelector("#billingAddressGUID");
+
+    // Hide the original label as the address picker provide its own,
+    // but we'll copy the localized textContent from it when rendering
+    addressRow.querySelector(".label-text").hidden = true;
+
+    addressPicker.dataset.addLinkLabel = this.dataset.addressAddLinkLabel;
+    addressPicker.dataset.editLinkLabel = this.dataset.addressEditLinkLabel;
+    addressPicker.dataset.fieldSeparator = this.dataset.addressFieldSeparator;
+    addressPicker.dataset.addAddressTitle = this.dataset.billingAddressTitleAdd;
+    addressPicker.dataset.editAddressTitle = this.dataset.billingAddressTitleEdit;
+    addressPicker.dataset.invalidLabel = this.dataset.invalidAddressLabel;
+    // break-after-nth-field, address-fields not needed here
+
+    // this state is only used to carry the selected guid between pages;
+    // the select#billingAddressGUID is the source of truth for the current value
+    addressPicker.setAttribute("selected-state-key", "basic-card-page|billingAddressGUID");
+
+    addressPicker.addLink.addEventListener("click", this);
+    addressPicker.editLink.addEventListener("click", this);
+
+    addressRow.appendChild(addressPicker);
+  }
+
   connectedCallback() {
     this.promiseReady.then(form => {
       this.body.appendChild(form);
@@ -106,6 +130,8 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
       form.addEventListener("input", this);
       form.addEventListener("invalid", this);
 
+      this._upgradeBillingAddressPicker();
+
       // The "invalid" event does not bubble and needs to be listened for on each
       // form element.
       for (let field of this.form.elements) {
@@ -117,18 +143,7 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
       cscContainer.textContent = "";
       cscContainer.appendChild(this.cscInput);
 
-      let fragment = document.createDocumentFragment();
-      fragment.append(" ");
-      fragment.append(this.addressEditLink);
-      fragment.append(this.addressAddLink);
       let billingAddressRow = this.form.querySelector(".billingAddressRow");
-
-      // XXX: Bug 1482689 - Remove the label-text class from the billing field
-      // which will be removed when switching to <rich-select>.
-      billingAddressRow.querySelector(".label-text").classList.remove("label-text");
-
-      billingAddressRow.appendChild(fragment);
-
       form.insertBefore(this.persistCheckbox, billingAddressRow);
       form.insertBefore(this.acceptedCardsList, billingAddressRow);
       this.body.appendChild(this.genericErrorText);
@@ -167,10 +182,13 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
     this.cscInput.frontTooltip = this.dataset.cscFrontInfoTooltip;
     this.cscInput.backTooltip = this.dataset.cscBackInfoTooltip;
 
+    // The label text from the form isn't available until render() time.
+    let labelText = this.form.querySelector(".billingAddressRow .label-text").textContent;
+    this.billingAddressPicker.setAttribute("label", labelText);
+
     this.persistCheckbox.label = this.dataset.persistCheckboxLabel;
     this.persistCheckbox.infoTooltip = this.dataset.persistCheckboxInfoTooltip;
-    this.addressAddLink.textContent = this.dataset.addressAddLinkLabel;
+
-    this.addressEditLink.textContent = this.dataset.addressEditLinkLabel;
     this.acceptedCardsList.label = this.dataset.acceptedCardsLabel;
 
     // The next line needs an onboarding check since we don't set previousId
@@ -227,7 +245,7 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
 
     this.form.querySelector(".billingAddressRow").hidden = false;
 
-    let billingAddressSelect = this.form.querySelector("#billingAddressGUID");
+    let billingAddressSelect = this.billingAddressPicker.dropdown;
     if (basicCardPage.billingAddressGUID) {
       billingAddressSelect.value = basicCardPage.billingAddressGUID;
     } else if (!editing) {
@@ -244,7 +262,7 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
     }
     // Need to recalculate the populated state since
     // billingAddressSelect is updated after loadRecord.
-    this.formHandler.updatePopulatedState(billingAddressSelect);
+    this.formHandler.updatePopulatedState(billingAddressSelect.popupBox);
 
     this.updateRequiredState();
     this.updateSaveButtonState();
@@ -289,21 +307,18 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
         paymentRequest.cancel();
         break;
       }
-      case this.addressAddLink:
+      case this.billingAddressPicker.addLink:
-      case this.addressEditLink: {
+      case this.billingAddressPicker.editLink: {
+        // The address-picker has set state for the page to advance to, now set up the
+        // necessary state for returning to and re-rendering this page
         let {
           "basic-card-page": basicCardPage,
+          page,
         } = this.requestStore.getState();
         let nextState = {
-          page: {
+          page: Object.assign({}, page, {
-            id: "address-page",
             previousId: "basic-card-page",
-          },
+          }),
-          "address-page": {
-            guid: null,
-            selectedStateKey: ["basic-card-page", "billingAddressGUID"],
-            title: this.dataset.billingAddressTitleAdd,
-          },
           "basic-card-page": {
             preserveFieldValues: true,
             guid: basicCardPage.guid,
@@ -311,24 +326,18 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
             selectedStateKey: basicCardPage.selectedStateKey,
           },
         };
-        let billingAddressGUID = this.form.querySelector("#billingAddressGUID");
-        let selectedOption = billingAddressGUID.selectedOptions.length &&
-                             billingAddressGUID.selectedOptions[0];
-        if (evt.target == this.addressEditLink && selectedOption && selectedOption.value) {
-          nextState["address-page"].title = this.dataset.billingAddressTitleEdit;
-          nextState["address-page"].guid = selectedOption.value;
-        }
         this.requestStore.setState(nextState);
         break;
       }
       case this.backButton: {
+        let currentState = this.requestStore.getState();
         let {
           page,
           request,
           "address-page": addressPage,
           "basic-card-page": basicCardPage,
           selectedShippingAddress,
-        } = this.requestStore.getState();
+        } = currentState;
 
         let nextState = {
           page: {
@@ -391,7 +400,10 @@ export default class BasicCardForm extends PaymentStateSubscriberMixin(PaymentRe
   }
 
   updateSaveButtonState() {
-    this.saveButton.disabled = !this.form.checkValidity();
+    const INVALID_CLASS_NAME = "invalid-selected-option";
+    let isValid = this.form.checkValidity() &&
+                  !this.billingAddressPicker.classList.contains(INVALID_CLASS_NAME);
+    this.saveButton.disabled = !isValid;
   }
 
   updateRequiredState() {

browser/components/payments/res/containers/billing-address-picker.js

@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import AddressPicker from "./address-picker.js";
+/* import-globals-from ../unprivileged-fallbacks.js */
+
+/**
+ * <billing-address-picker></billing-address-picker>
+ * Extends AddressPicker to treat the <select>'s value as the source of truth
+ */
+
+export default class BillingAddressPicker extends AddressPicker {
+  constructor() {
+    super();
+    this._allowEmptyOption = true;
+  }
+
+  /**
+   * @param {object?} state - See `PaymentsStore.setState`
+   * The value of the picker is the child dropdown element's value
+   * @returns {string} guid
+   */
+  getCurrentValue() {
+    return this.dropdown.value;
+  }
+
+  onChange(event) {
+    this.render(this.requestStore.getState());
+  }
+}
+
+customElements.define("billing-address-picker", BillingAddressPicker);

browser/components/payments/res/containers/rich-picker.js

@@ -16,29 +16,30 @@ export default class RichPicker extends PaymentStateSubscriberMixin(HTMLElement)
 
     this.dropdown = new RichSelect();
     this.dropdown.addEventListener("change", this);
-    this.dropdown.popupBox.id = "select-" + Math.floor(Math.random() * 1000000);
 
     this.labelElement = document.createElement("label");
-    this.labelElement.setAttribute("for", this.dropdown.popupBox.id);
 
     this.addLink = document.createElement("a");
     this.addLink.className = "add-link";
     this.addLink.href = "javascript:void(0)";
-    this.addLink.textContent = this.dataset.addLinkLabel;
     this.addLink.addEventListener("click", this);
 
     this.editLink = document.createElement("a");
     this.editLink.className = "edit-link";
     this.editLink.href = "javascript:void(0)";
-    this.editLink.textContent = this.dataset.editLinkLabel;
     this.editLink.addEventListener("click", this);
 
     this.invalidLabel = document.createElement("label");
     this.invalidLabel.className = "invalid-label";
-    this.invalidLabel.setAttribute("for", this.dropdown.popupBox.id);
   }
 
   connectedCallback() {
+    if (!this.dropdown.popupBox.id) {
+      this.dropdown.popupBox.id = "select-" + Math.floor(Math.random() * 1000000);
+    }
+    this.labelElement.setAttribute("for", this.dropdown.popupBox.id);
+    this.invalidLabel.setAttribute("for", this.dropdown.popupBox.id);
+
     // The document order, by default, controls tab order so keep that in mind if changing this.
     this.appendChild(this.labelElement);
     this.appendChild(this.dropdown);
@@ -61,6 +62,8 @@ export default class RichPicker extends PaymentStateSubscriberMixin(HTMLElement)
     this.classList.toggle("invalid-selected-option",
                           !!errorText);
     this.invalidLabel.textContent = errorText;
+    this.addLink.textContent = this.dataset.addLinkLabel;
+    this.editLink.textContent = this.dataset.editLinkLabel;
   }
 
   get selectedOption() {
@@ -99,7 +102,8 @@ export default class RichPicker extends PaymentStateSubscriberMixin(HTMLElement)
       return [];
     }
 
-    let fieldNames = this.selectedRichOption.requiredFields;
+    let fieldNames = this.selectedRichOption.requiredFields || [];
+
     // Return all field names that are empty or missing from the option.
     return fieldNames.filter(name => !selectedOption.getAttribute(name));
   }

browser/components/payments/res/paymentRequest.xhtml

@@ -193,8 +193,12 @@
                        data-add-basic-card-title="&basicCard.addPage.title;"
                        data-edit-basic-card-title="&basicCard.editPage.title;"
                        data-error-generic-save="&basicCardPage.error.genericSave;"
+
                        data-address-add-link-label="&basicCardPage.addressAddLink.label;"
                        data-address-edit-link-label="&basicCardPage.addressEditLink.label;"
+
+                       data-invalid-address-label="&invalidOption.label;"
+                       data-address-field-separator="&address.fieldSeparator;"
                        data-billing-address-title-add="&billingAddress.addPage.title;"
                        data-billing-address-title-edit="&billingAddress.editPage.title;"
                        data-back-button-label="&basicCardPage.backButton.label;"

browser/components/payments/test/browser/browser_card_edit.js

@@ -36,6 +36,7 @@ async function add_link(aOptions = {}) {
       checkboxSelector: "basic-card-form .persist-checkbox",
       expectPersist: aOptions.expectDefaultCardPersist,
     });
+
     await spawnPaymentDialogTask(frame, async function checkState(testArgs = {}) {
       let {
         PaymentTestUtils: PTU,
@@ -163,12 +164,12 @@ async function add_link(aOptions = {}) {
       ok(state["basic-card-page"].billingAddressGUID,
          "billingAddressGUID should be set when coming back from address-page");
 
-      let billingAddressSelect = content.document.querySelector("#billingAddressGUID");
+      let billingAddressPicker = Cu.waiveXrays(
+        content.document.querySelector("basic-card-form billing-address-picker"));
 
-      is(billingAddressSelect.childElementCount, 3,
+      is(billingAddressPicker.options.length, 3,
-         "Three options should exist in the billingAddressSelect");
+         "Three options should exist in the billingAddressPicker");
-      let selectedOption =
+      let selectedOption = billingAddressPicker.dropdown.selectedOption;
-        billingAddressSelect.children[billingAddressSelect.selectedIndex];
       let selectedAddressGuid = selectedOption.value;
       let lastAddress = Object.values(addressColn)[Object.keys(addressColn).length - 1];
       is(selectedAddressGuid, lastAddress.guid, "The select should have the new address selected");
@@ -411,8 +412,11 @@ add_task(async function test_edit_link() {
   const args = {
     methodData: [PTU.MethodData.basicCard],
     details: PTU.Details.total60USD,
+    prefilledGuids,
   };
-  await spawnInDialogForMerchantTask(PTU.ContentTasks.createAndShowRequest, async function check() {
+  await spawnInDialogForMerchantTask(
+    PTU.ContentTasks.createAndShowRequest,
+    async function check({prefilledGuids}) {
       let {
         PaymentTestUtils: PTU,
       } = ChromeUtils.import("resource://testing-common/PaymentTestUtils.jsm", {});
@@ -449,22 +453,31 @@ add_task(async function test_edit_link() {
         field.value = val;
         ok(!field.disabled, `Field #${key} shouldn't be disabled`);
       }
-    ok(content.document.getElementById("cc-number").disabled, "cc-number field should be disabled");
+      ok(content.document.getElementById("cc-number").disabled,
+         "cc-number field should be disabled");
 
-    let billingAddressSelect = content.document.querySelector("#billingAddressGUID");
+      let billingAddressPicker = Cu.waiveXrays(
-    is(billingAddressSelect.childElementCount, 2,
+        content.document.querySelector("basic-card-form billing-address-picker"));
-       "Two options should exist in the billingAddressSelect");
+
-    is(billingAddressSelect.selectedIndex, 1,
+      let initialSelectedAddressGuid = billingAddressPicker.dropdown.value;
+      is(billingAddressPicker.options.length, 2,
+         "Two options should exist in the billingAddressPicker");
+      is(initialSelectedAddressGuid, prefilledGuids.address1GUID,
          "The prefilled billing address should be selected by default");
 
-    info("Test clicking 'edit' on the empty option first");
+      info("Test clicking 'add' on the empty option first");
-    billingAddressSelect.selectedIndex = 0;
+      billingAddressPicker.dropdown.popupBox.focus();
+      content.fillField(billingAddressPicker.dropdown.popupBox, "");
 
       let addressEditLink = content.document.querySelector(".billingAddressRow .edit-link");
-    addressEditLink.click();
+      ok(addressEditLink && !content.isVisible(addressEditLink),
+         "The edit link is hidden when empty option is selected");
+
+      let addressAddLink = content.document.querySelector(".billingAddressRow .add-link");
+      addressAddLink.click();
       state = await PTU.DialogContentUtils.waitForState(content, (state) => {
         return state.page.id == "address-page" && !state["address-page"].guid;
-    }, "Clicking edit button when the empty option is selected will go to 'add' page (no guid)");
+      }, "Clicking add button when the empty option is selected will go to 'add' page (no guid)");
 
       let addressTitle = content.document.querySelector("address-form h2");
       is(addressTitle.textContent, "Add Billing Address",
@@ -478,10 +491,9 @@ add_task(async function test_edit_link() {
       }, "Check we're back at basic-card page with no state changed after adding");
 
       info("Go back to previously selected option before clicking 'edit' now");
-    billingAddressSelect.selectedIndex = 1;
+      billingAddressPicker.dropdown.value = initialSelectedAddressGuid;
 
-    let selectedOption = billingAddressSelect.selectedOptions.length &&
+      let selectedOption = billingAddressPicker.dropdown.selectedOption;
-                         billingAddressSelect.selectedOptions[0];
       ok(selectedOption && selectedOption.value, "select should have a selected option value");
 
       addressEditLink.click();
@@ -507,8 +519,7 @@ add_task(async function test_edit_link() {
         is(field.value, val, "Field should still have previous value entered");
       }
 
-    selectedOption = billingAddressSelect.selectedOptions.length &&
+      selectedOption = billingAddressPicker.dropdown.selectedOption;
-                     billingAddressSelect.selectedOptions[0];
       ok(selectedOption && selectedOption.value, "select should have a selected option value");
 
       addressEditLink.click();
@@ -548,7 +559,8 @@ add_task(async function test_edit_link() {
       let cardGUIDs = Object.keys(state.savedBasicCards);
       is(cardGUIDs.length, 1, "Check there is still one card");
       let savedCard = state.savedBasicCards[cardGUIDs[0]];
-    is(savedCard["cc-number"], "************1111", "Card number should be masked and unmodified.");
+      is(savedCard["cc-number"], "************1111",
+         "Card number should be masked and unmodified.");
       for (let [key, val] of Object.entries(card)) {
         is(savedCard[key], val, "Check updated " + key);
       }

browser/components/payments/test/mochitest/mochitest.ini

@@ -20,6 +20,7 @@ skip-if = os == "linux" || os == "win" # Bug 1493216
 [test_basic_card_form.html]
 skip-if = debug || asan # Bug 1493349
 [test_basic_card_option.html]
+[test_billing_address_picker.html]
 [test_completion_error_page.html]
 [test_currency_amount.html]
 [test_labelled_checkbox.html]

browser/components/payments/test/mochitest/test_address_form.html

@@ -90,6 +90,9 @@ add_task(async function test_initialState() {
 add_task(async function test_backButton() {
   let form = new AddressForm();
   form.dataset.backButtonLabel = "Back";
+  await form.promiseReady;
+  display.appendChild(form);
+
   await form.requestStore.setState({
     page: {
       id: "address-page",
@@ -99,9 +102,6 @@ add_task(async function test_backButton() {
       title: "Sample page title",
     },
   });
-
-  await form.promiseReady;
-  display.appendChild(form);
   await asyncElementRendered();
 
   let stateChangePromise = promiseStateChange(form.requestStore);

browser/components/payments/test/mochitest/test_basic_card_form.html

@@ -61,6 +61,14 @@ function checkCCForm(customEl, expectedCard) {
   }
 }
 
+function createAddressRecord(source, props = {}) {
+  let address = Object.assign({}, source, props);
+  if (!address.name) {
+    address.name = `${address["given-name"]} ${address["family-name"]}`;
+  }
+  return address;
+}
+
 add_task(async function setup_once() {
   let templateFrame = document.getElementById("templateFrame");
   await SimpleTest.promiseFocus(templateFrame.contentWindow);
@@ -70,6 +78,13 @@ add_task(async function setup_once() {
 
 add_task(async function test_initialState() {
   let form = new BasicCardForm();
+
+  await form.requestStore.setState({
+    savedAddresses: {
+      "TimBLGUID": createAddressRecord(PTU.Addresses.TimBL),
+    },
+  });
+
   let {page} = form.requestStore.getState();
   is(page.id, "payment-summary", "Check initial page");
   await form.promiseReady;
@@ -79,6 +94,9 @@ add_task(async function test_initialState() {
 
   // :-moz-ui-invalid, unlike :invalid, only applies to fields showing the error outline.
   let fieldsVisiblyInvalid = form.querySelectorAll(":-moz-ui-invalid");
+  for (let field of fieldsVisiblyInvalid) {
+    info("invalid field: " + field.localName + "#" + field.id + "." + field.className);
+  }
   is(fieldsVisiblyInvalid.length, 0, "Check no fields are visibly invalid on an empty 'add' form");
 
   form.remove();
@@ -116,18 +134,18 @@ add_task(async function test_saveButton() {
   let form = new BasicCardForm();
   form.dataset.nextButtonLabel = "Next";
   form.dataset.errorGenericSave = "Generic error";
+  form.dataset.invalidAddressLabel = "Invalid";
+
   await form.promiseReady;
   display.appendChild(form);
 
-  let address1 = deepClone(PTU.Addresses.TimBL);
+  let address1 = createAddressRecord(PTU.Addresses.TimBL, {guid: "TimBLGUID"});
-  address1.guid = "TimBLGUID";
+  let address2 = createAddressRecord(PTU.Addresses.TimBL2, {guid: "TimBL2GUID"});
-  let address2 = deepClone(PTU.Addresses.TimBL2);
-  address2.guid = "TimBL2GUID";
-
 
   await form.requestStore.setState({
     request: {
       paymentMethods,
+      paymentDetails: {},
     },
     savedAddresses: {
       [address1.guid]: deepClone(address1),
@@ -274,10 +292,8 @@ add_task(async function test_add_selectedShippingAddress() {
   card1.guid = "9864798564";
   card1["cc-exp-year"] = 2011;
 
-  let address1 = deepClone(PTU.Addresses.TimBL);
+  let address1 = createAddressRecord(PTU.Addresses.TimBL, { guid: "TimBLGUID" });
-  address1.guid = "TimBLGUID";
+  let address2 = createAddressRecord(PTU.Addresses.TimBL2, { guid: "TimBL2GUID" });
-  let address2 = deepClone(PTU.Addresses.TimBL2);
-  address2.guid = "TimBL2GUID";
 
   await form.requestStore.setState({
     page: {
@@ -312,8 +328,7 @@ add_task(async function test_add_noSelectedShippingAddress() {
   card1.guid = "9864798564";
   card1["cc-exp-year"] = 2011;
 
-  let address1 = deepClone(PTU.Addresses.TimBL);
+  let address1 = createAddressRecord(PTU.Addresses.TimBL, { guid: "TimBLGUID" });
-  address1.guid = "TimBLGUID";
 
   await form.requestStore.setState({
     page: {
@@ -352,8 +367,7 @@ add_task(async function test_edit() {
   display.appendChild(form);
   await asyncElementRendered();
 
-  let address1 = deepClone(PTU.Addresses.TimBL);
+  let address1 = createAddressRecord(PTU.Addresses.TimBL, { guid: "TimBLGUID" });
-  address1.guid = "TimBLGUID";
 
   info("test year before current");
   let card1 = deepClone(PTU.BasicCards.JohnDoe);
@@ -364,6 +378,7 @@ add_task(async function test_edit() {
   await form.requestStore.setState({
     request: {
       paymentMethods,
+      paymentDetails: {},
     },
     page: {
       id: "basic-card-page",
@@ -383,6 +398,7 @@ add_task(async function test_edit() {
   is(form.saveButton.textContent, "Update", "Check label");
   is(form.querySelectorAll(":-moz-ui-invalid").length, 0,
      "Check no fields are visibly invalid on an 'edit' form with a complete card");
+
   checkCCForm(form, card1);
   ok(!form.saveButton.disabled, "Save button should be enabled upon edit for a valid card");
   ok(!form.acceptedCardsList.hidden, "Accepted card list should be visible when editing a card");
@@ -460,6 +476,17 @@ add_task(async function test_field_validity_updates() {
   form.dataset.updateButtonLabel = "Update";
   await form.promiseReady;
   display.appendChild(form);
+
+  let address1 = createAddressRecord(PTU.Addresses.TimBL, {guid: "TimBLGUID"});
+  await form.requestStore.setState({
+    request: {
+      paymentMethods,
+      paymentDetails: {},
+    },
+    savedAddresses: {
+      [address1.guid]: deepClone(address1),
+    },
+  });
   await asyncElementRendered();
 
   let ccNumber = form.form.querySelector("#cc-number");
@@ -468,6 +495,7 @@ add_task(async function test_field_validity_updates() {
   let cscInput = form.form.querySelector("csc-input input");
   let monthInput = form.form.querySelector("#cc-exp-month");
   let yearInput = form.form.querySelector("#cc-exp-year");
+  let addressPicker = form.querySelector("#billingAddressGUID");
 
   info("test with valid cc-number but missing cc-name");
   fillField(ccNumber, "4111111111111111");
@@ -487,6 +515,16 @@ add_task(async function test_field_validity_updates() {
   ok(monthInput.checkValidity(), "cc-exp-month field is valid with a value");
   ok(yearInput.checkValidity(), "cc-exp-year field is valid with a value");
   ok(typeInput.checkValidity(), "cc-type field is valid with a value");
+
+  // should auto-select the first billing address
+  ok(addressPicker.value, "An address is selected: " + addressPicker.value);
+
+  let fieldsVisiblyInvalid = form.querySelectorAll(":-moz-ui-invalid");
+  for (let field of fieldsVisiblyInvalid) {
+    info("invalid field: " + field.localName + "#" + field.id + "." + field.className);
+  }
+  is(fieldsVisiblyInvalid.length, 0, "No fields are visibly invalid");
+
   ok(!form.saveButton.disabled, "Save button should not be disabled with good input");
 
   info("edit to make the cc-number invalid");
@@ -518,6 +556,17 @@ add_task(async function test_numberCustomValidityReset() {
   form.dataset.updateButtonLabel = "Update";
   await form.promiseReady;
   display.appendChild(form);
+
+  let address1 = createAddressRecord(PTU.Addresses.TimBL, {guid: "TimBLGUID"});
+  await form.requestStore.setState({
+    request: {
+      paymentMethods,
+      paymentDetails: {},
+    },
+    savedAddresses: {
+      [address1.guid]: deepClone(address1),
+    },
+  });
   await asyncElementRendered();
 
   fillField(form.querySelector("#cc-number"), "junk");

browser/components/payments/test/mochitest/test_billing_address_picker.html

@@ -0,0 +1,133 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+Test the address-picker component
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test the billing-address-picker component</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript" src="/tests/SimpleTest/AddTask.js"></script>
+  <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+  <script src="payments_common.js"></script>
+  <script src="../../res/unprivileged-fallbacks.js"></script>
+  <script src="autofillEditForms.js"></script>
+
+  <link rel="stylesheet" type="text/css" href="../../res/containers/rich-picker.css"/>
+  <link rel="stylesheet" type="text/css" href="../../res/components/rich-select.css"/>
+  <link rel="stylesheet" type="text/css" href="../../res/components/address-option.css"/>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <p id="display">
+    <billing-address-picker id="picker1"
+                    data-field-separator=", "
+                    data-invalid-label="Picker1: Missing or Invalid"
+                    selected-state-key="basic-card-page|billingAddressGUID"></billing-address-picker>
+    <select id="theOptions">
+      <option></option>
+      <option value="48bnds6854t">48bnds6854t</option>
+      <option value="68gjdh354j" selected="">68gjdh354j</option>
+    </select>
+  </p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+<script type="module">
+/** Test the billing-address-picker component **/
+
+import BillingAddressPicker from "../../res/containers/billing-address-picker.js";
+
+let picker1 = document.getElementById("picker1");
+let addresses = {
+  "48bnds6854t": {
+    "address-level1": "MI",
+    "address-level2": "Some City",
+    "country": "US",
+    "guid": "48bnds6854t",
+    "name": "Mr. Foo",
+    "postal-code": "90210",
+    "street-address": "123 Sesame Street,\nApt 40",
+    "tel": "+1 519 555-5555",
+    timeLastUsed: 200,
+  },
+  "68gjdh354j": {
+    "address-level1": "CA",
+    "address-level2": "Mountain View",
+    "country": "US",
+    "guid": "68gjdh354j",
+    "name": "Mrs. Bar",
+    "postal-code": "94041",
+    "street-address": "P.O. Box 123",
+    "tel": "+1 650 555-5555",
+    timeLastUsed: 300,
+  },
+  "abcde12345": {
+    "address-level2": "Mountain View",
+    "country": "US",
+    "guid": "abcde12345",
+    "name": "Mrs. Fields",
+    timeLastUsed: 100,
+  },
+};
+
+add_task(async function test_empty() {
+  ok(picker1, "Check picker1 exists");
+  let {savedAddresses} = picker1.requestStore.getState();
+  is(Object.keys(savedAddresses).length, 0, "Check empty initial state");
+  is(picker1.editLink.hidden, true, "Check that picker edit link is hidden");
+  is(picker1.options.length, 1, "Check only the empty option is present");
+  ok(picker1.dropdown.selectedOption, "Has a selectedOption");
+  is(picker1.dropdown.value, "", "Has empty value");
+
+  // update state to trigger render without changing available addresses
+  picker1.requestStore.setState({
+    "basic-card-page": {
+      "someKey": "someValue",
+    },
+  });
+  await asyncElementRendered();
+
+  is(picker1.dropdown.popupBox.children.length, 1, "Check only the empty option is present");
+  ok(picker1.dropdown.selectedOption, "Has a selectedOption");
+  is(picker1.dropdown.value, "", "Has empty value");
+});
+
+add_task(async function test_getCurrentValue() {
+  picker1.requestStore.setState({
+    "basic-card-page": {
+      "billingAddressGUID": "68gjdh354j",
+    },
+    savedAddresses: addresses,
+  });
+  await asyncElementRendered();
+
+  picker1.dropdown.popupBox.value = "abcde12345";
+
+  is(picker1.options.length, 4, "Check we have options for each address + empty one");
+  is(picker1.getCurrentValue(picker1.requestStore.getState()), "abcde12345",
+     "Initial/current value reflects the <select>.value, " +
+     "not whatever is in the state at the selectedStateKey");
+});
+
+add_task(async function test_wrapPopupBox() {
+  let picker = new BillingAddressPicker();
+  picker.dropdown.popupBox = document.querySelector("#theOptions");
+  picker.dataset.invalidLabel = "Invalid";
+  picker.setAttribute("label", "The label");
+  picker.setAttribute("selected-state-key", "basic-card-page|billingAddressGUID");
+
+  document.querySelector("#display").appendChild(picker);
+
+  is(picker.labelElement.getAttribute("for"), "theOptions",
+     "The label points at the right element");
+  is(picker.invalidLabel.getAttribute("for"), "theOptions",
+     "The invalidLabel points at the right element");
+});
+
+</script>
+
+</body>
+</html>