Add acceptance tests for multi-statement queries, zero-date imports, and fallback behavior

Author: swissspidy

features/db-import.feature

@@ -97,6 +97,34 @@ Feature: Import a WordPress database
       MySQL/MariaDB binary not available, falling back to wpdb for import.
       """
 
+  @require-mysql-or-mariadb
+  Scenario: Database import falls back to wpdb and handles zero-date column defaults
+    Given a WP install
+    And a fake-bin/mysql file:
+      """
+      #!/bin/sh
+      exit 127
+      """
+    And a fake-bin/mariadb file:
+      """
+      #!/bin/sh
+      exit 127
+      """
+    And a zero_date.sql file:
+      """
+      CREATE TABLE IF NOT EXISTS wp_zero_date_test (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        created_at DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00'
+      );
+      """
+
+    When I run `chmod +x fake-bin/mysql fake-bin/mariadb`
+    And I try `env PATH={RUN_DIR}/fake-bin:$PATH wp db import zero_date.sql --debug`
+    Then STDOUT should be:
+      """
+      Success: Imported from 'zero_date.sql'.
+      """
+
   # SQLite doesn't support the --dbuser flag.
   @require-mysql-or-mariadb
   Scenario: Import from database name path by default with passed-in dbuser/dbpass

features/db-query.feature

@@ -181,3 +181,44 @@ Feature: Query the database with WordPress' MySQL config
       """
       MySQL/MariaDB binary not available, falling back to wpdb.
       """
+
+  @require-mysql-or-mariadb
+  Scenario: Database querying falls back to wpdb for multi-statement queries when mysql binary is unavailable
+    Given a WP install
+    And a fake-bin/mysql file:
+      """
+      #!/bin/sh
+      exit 127
+      """
+    And a fake-bin/mariadb file:
+      """
+      #!/bin/sh
+      exit 127
+      """
+
+    When I run `chmod +x fake-bin/mysql fake-bin/mariadb`
+    And I try `env PATH={RUN_DIR}/fake-bin:$PATH wp db query "SELECT 1 as num; SELECT 2 as num;" --debug`
+    Then STDOUT should contain:
+      """
+      num
+      1
+      """
+    And STDOUT should contain:
+      """
+      num
+      2
+      """
+
+  Scenario: Database querying falls back to wpdb when PATH contains no binaries
+    Given a WP install
+
+    When I try `env PATH=/empty_path wp db query "SELECT COUNT(ID) FROM wp_users;" --debug`
+    Then STDOUT should be:
+      """
+      COUNT(ID)
+      1
+      """
+    And STDERR should contain:
+      """
+      MySQL/MariaDB binary not available, falling back to wpdb.
+      """