Check if taxes are enabled in ECE tax compatibility logic (#3563)

* Check if taxes are enabled in ECE tax compatibility logic

* Update unit tests

changelog.txt

@@ -3,6 +3,7 @@
 = 8.9.0 - xxxx-xx-xx =
 * Tweak - Makes the new Stripe Express Checkout Element enabled by default.
 * Dev - Add multiple unit tests for the Stripe Express Checkout Element implementation (for both frontend and backend).
+* Fix - Check if taxes are enabled when applying ECE tax compatibility check.
 * Fix - Fix ECE error when initial address on load is not defined as a shipping zone.
 * Fix - Corrected card brand capitalization on the My Account → Subscription page.
 * Fix - Displays a specific message when an authentication error occurs during checkout for 3DS cards (shortcode version).

includes/payment-methods/class-wc-stripe-express-checkout-helper.php

@@ -585,6 +585,7 @@ public function should_show_express_checkout_button() {
 				( is_product() && ! $this->product_needs_shipping( $this->get_product() ) ) ||
 				( ( is_cart() || is_checkout() ) && ! WC()->cart->needs_shipping() )
 			) &&
+			wc_tax_enabled() &&
 			in_array( get_option( 'woocommerce_tax_based_on' ), [ 'billing', 'shipping' ], true )
 		) {
 			return false;

readme.txt

@@ -113,6 +113,7 @@ If you get stuck, you can ask for help in the [Plugin Forum](https://wordpress.o
 = 8.9.0 - xxxx-xx-xx =
 * Tweak - Makes the new Stripe Express Checkout Element enabled by default.
 * Dev - Add multiple unit tests for the Stripe Express Checkout Element implementation (for both frontend and backend).
+* Fix - Check if taxes are enabled when applying ECE tax compatibility check.
 * Fix - Fix ECE error when initial address on load is not defined as a shipping zone.
 * Fix - Corrected card brand capitalization on the My Account → Subscription page.
 * Fix - Displays a specific message when an authentication error occurs during checkout for 3DS cards (shortcode version).

tests/phpunit/test-wc-stripe-express-checkout-helper.php

@@ -19,6 +19,18 @@ public function set_up() {
 		$stripe_settings['test_publishable_key'] = 'pk_test_key';
 		$stripe_settings['test_secret_key']      = 'sk_test_key';
 		WC_Stripe_Helper::update_main_stripe_settings( $stripe_settings );
+
+		// Add a shipping zone.
+		$zone = new WC_Shipping_Zone();
+		$zone->set_zone_name( 'Worldwide' );
+		$zone->set_zone_order( 1 );
+		$zone->save();
+
+		$flat_rate_id    = $zone->add_shipping_method( 'flat_rate' );
+		$method          = WC_Shipping_Zones::get_shipping_method( $flat_rate_id );
+		$option_key      = $method->get_instance_option_key();
+		$options['cost'] = '5';
+		update_option( $option_key, $options );
 	}
 
 	/**
@@ -52,17 +64,24 @@ public function test_hides_ece_if_cannot_compute_taxes() {
 		WC()->cart->add_to_cart( $virtual_product->get_id(), 1 );
 
 		// Hide if cart has virtual product and tax is based on shipping or billing address.
+		update_option( 'woocommerce_calc_taxes', 'yes' );
 		update_option( 'woocommerce_tax_based_on', 'billing' );
 		$this->assertFalse( $wc_stripe_ece_helper_mock->should_show_express_checkout_button() );
 
 		update_option( 'woocommerce_tax_based_on', 'shipping' );
 		$this->assertFalse( $wc_stripe_ece_helper_mock->should_show_express_checkout_button() );
 
+		// Do not hide if taxes are not enabled.
+		update_option( 'woocommerce_calc_taxes', 'no' );
+		$this->assertTrue( $wc_stripe_ece_helper_mock->should_show_express_checkout_button() );
+
 		// Do not hide if taxes are not based on customer billing or shipping address.
+		update_option( 'woocommerce_calc_taxes', 'yes' );
 		update_option( 'woocommerce_tax_based_on', 'base' );
 		$this->assertTrue( $wc_stripe_ece_helper_mock->should_show_express_checkout_button() );
 
 		// Do not hide if cart requires shipping.
+		update_option( 'woocommerce_tax_based_on', 'billing' );
 		$shippable_product = WC_Helper_Product::create_simple_product();
 		WC()->cart->add_to_cart( $shippable_product->get_id(), 1 );
 		$this->assertTrue( $wc_stripe_ece_helper_mock->should_show_express_checkout_button() );