fix: honor MySQL contracts in managed PHPUnit

Author: chubes4

docs/recipe-contract.md

@@ -759,7 +759,7 @@ The runtime provides:
 - `WP_TESTS_DIR` pointing at the configured WordPress tests library.
 - `WP_TESTS_CONFIG_FILE_PATH` and `WP_PHPUNIT__TESTS_CONFIG` pointing at the
   generated `wp-tests-config.php`.
-- An isolated SQLite test database via `DB_NAME=':memory:'`.
+- An isolated SQLite test database via `DB_NAME=':memory:'` by default.
 - A plugin working directory via `cwd=<sandbox path>`, matching the practical
   role of `wp-env run --env-cwd`.
 - Structured diagnostics in the recipe artifact bundle, including the raw test
@@ -774,13 +774,21 @@ created test tables and before test discovery and execution. Any dependency
 `plugins_loaded` callbacks registered during that load are invoked once after
 dependency activation.
 
+Set `databaseType` to `mysql` when managed PHPUnit tests require MySQL semantics.
+The builder provisions a disposable MySQL service, maps its canonical `DB_*`
+outputs into the runtime, and writes those values into `wp-tests-config.php`.
+An explicit MySQL declaration fails before tests if the runtime cannot provide
+that service; WP Codebox never substitutes SQLite for it. Omitting
+`databaseType` preserves the default SQLite behavior.
+
 Use `recipe build phpunit` when generating recipes for plugin CI or offloaded lab
 runners:
 
 ```json
 {
   "pluginSlug": "woocommerce",
   "pluginSource": "../woocommerce/plugins/woocommerce",
+  "databaseType": "mysql",
   "services": [
     {
       "id": "mysql",

packages/cli/src/commands/recipe-build.ts

@@ -11,6 +11,7 @@ interface WordPressPhpunitBuilderOptions {
   blueprint?: unknown
   wordpressVersion?: string
   phpVersion?: string
+  databaseType?: "sqlite" | "mysql"
   wordpressInstallMode?: RuntimeWordPressInstallMode
   extensions?: WorkspaceRecipePHPWasmExtensionManifest[]
   backendPackage?: WorkspaceRecipeRuntimeBackendPackage
@@ -81,6 +82,7 @@ function buildRecipe(recipeType: RecipeBuildOptions["recipeType"], options: Word
         blueprint: phpunitOptions.blueprint,
         wordpressVersion: stringOrUndefined(phpunitOptions.wordpressVersion),
         phpVersion: stringOrUndefined(phpunitOptions.phpVersion),
+        databaseType: phpunitOptions.databaseType,
         wordpressInstallMode: phpunitOptions.wordpressInstallMode,
         extensions: Array.isArray(phpunitOptions.extensions) ? phpunitOptions.extensions : [],
         backendPackage: phpunitOptions.backendPackage,

packages/runtime-core/src/command-registry.ts

@@ -955,6 +955,7 @@ export const commandRegistry = [
       { name: "bootstrap-mode", description: "Bootstrap strategy: managed keeps WP Codebox-owned setup; project requires the plugin's native PHPUnit bootstrap.", format: "managed|project" },
       { name: "project-bootstrap", description: "Plugin-relative PHPUnit bootstrap path used when bootstrap-mode=project. If omitted, the phpunit.xml bootstrap attribute is used.", format: "relative path" },
       { name: "multisite", description: "Run as multisite.", format: "boolean" },
+      { name: "database-type", description: "Required WordPress database backend. MySQL requires a managed external database service; omitted defaults to SQLite.", format: "sqlite|mysql" },
     ],
     outputShape: "Raw PHPUnit runner JSON/log output plus normalized test-results artifact when artifacts are collected.",
     policyRequirement: "Runtime policy commands must include wordpress.phpunit.",

packages/runtime-core/src/recipe-builders.ts

@@ -14,6 +14,7 @@ export interface NormalizeRecipeMountsOptions {
 export interface WordPressPhpunitRecipeOptions {
   wordpressVersion?: string
   phpVersion?: string
+  databaseType?: "sqlite" | "mysql"
   wordpressInstallMode?: RuntimeWordPressInstallMode
   blueprint?: unknown
   extensions?: WorkspaceRecipePHPWasmExtensionManifest[]
@@ -73,6 +74,7 @@ export function buildWordPressPhpunitRecipe(options: WordPressPhpunitRecipeOptio
   const pluginSlug = requiredPluginSlug(options.pluginSlug, "buildWordPressPhpunitRecipe")
   const pluginTarget = `/wordpress/wp-content/plugins/${pluginSlug}`
   const autoloadFile = options.autoloadFile ?? (options.bootstrapMode === "project" ? "" : "/wp-codebox-vendor/autoload.php")
+  const services = phpunitRuntimeServices(options.databaseType, options.services)
 
   return {
     schema: "wp-codebox/workspace-recipe/v1",
@@ -87,7 +89,7 @@ export function buildWordPressPhpunitRecipe(options: WordPressPhpunitRecipeOptio
     },
     inputs: {
       extra_plugins: normalizeExtraPlugins(options.extra_plugins),
-      ...(options.services && options.services.length > 0 ? { services: options.services } : {}),
+      ...(services.length > 0 ? { services } : {}),
       mounts: normalizeRecipeMounts([
         ...(options.pluginSource ? [{ source: options.pluginSource, target: pluginTarget } satisfies WorkspaceRecipeMount] : []),
         ...(options.mounts ?? []),
@@ -118,12 +120,30 @@ export function buildWordPressPhpunitRecipe(options: WordPressPhpunitRecipeOptio
           commandArg("bootstrap-mode", options.bootstrapMode ?? "managed"),
           commandArg("project-bootstrap", options.projectBootstrap ?? ""),
           commandArg("multisite", options.multisite ? "1" : "0"),
+          ...(options.databaseType ? [commandArg("database-type", options.databaseType)] : []),
         ],
       }],
     },
   }
 }
 
+function phpunitRuntimeServices(databaseType: WordPressPhpunitRecipeOptions["databaseType"], services: WorkspaceRecipeRuntimeService[] = []): WorkspaceRecipeRuntimeService[] {
+  if (databaseType !== undefined && databaseType !== "sqlite" && databaseType !== "mysql") {
+    throw new Error(`Unsupported PHPUnit database type: ${databaseType}`)
+  }
+  if (databaseType !== "mysql") {
+    return services
+  }
+
+  const mysqlIndex = services.findIndex((service) => service.kind === "mysql")
+  const canonicalOutputs = { host: "DB_HOST", port: "DB_PORT", username: "DB_USER", password: "DB_PASSWORD", database: "DB_NAME" }
+  if (mysqlIndex === -1) {
+    return [...services, { id: "wordpress-database", kind: "mysql", outputs: canonicalOutputs }]
+  }
+
+  return services.map((service, index) => index === mysqlIndex ? { ...service, outputs: { ...service.outputs, ...canonicalOutputs } } : service)
+}
+
 function normalizeRecipeSteps(steps: readonly WorkspaceRecipeStep[], label: string): WorkspaceRecipeStep[] {
   return steps.map((step, index) => {
     if (!step.command || typeof step.command !== "string") {

packages/runtime-playground/src/phpunit-command-handlers.ts

@@ -21,6 +21,7 @@ export interface PhpunitRunCodeOptions {
   bootstrapMode: string
   projectBootstrap: string
   multisite: boolean
+  databaseType: "sqlite" | "mysql"
   /**
    * Sandbox-internal, writable path for the structured diagnostics log. Defaults
    * to a /tmp path so diagnostics survive read-only plugin mounts and a mid-install
@@ -361,6 +362,7 @@ $preload_files = json_decode(${JSON.stringify(JSON.stringify(options.preloadFile
 $bootstrap_mode = ${JSON.stringify(options.bootstrapMode || "managed")};
 $project_bootstrap = ${JSON.stringify(options.projectBootstrap)};
 $multisite = ${JSON.stringify(options.multisite)};
+$database_type = ${JSON.stringify(options.databaseType)};
 
 function pg_build_phpunit_argv($raw): array {
     $phpunit_argv = array('phpunit');
@@ -630,11 +632,33 @@ function pg_run_boot_stage(array $cfg = []): ?string {
         $config = "<?php\n";
         pg_append_wp_config_defines($config, $extra_defines);
         $config .= '$table_prefix = ' . var_export($table_prefix, true) . ";\n";
-        $config .= <<<'CONFIG'
+        $database_type = (string) ($cfg['database_type'] ?? 'sqlite');
+        if ($database_type === 'mysql') {
+            $db_host = getenv('DB_HOST');
+            if (!is_string($db_host) || $db_host === '') {
+                throw new RuntimeException('Managed PHPUnit requires DB_HOST when database-type=mysql; declare a MySQL runtime service with canonical DB_* outputs.');
+            }
+            $db_port = getenv('DB_PORT');
+            if (is_string($db_port) && $db_port !== '') {
+                $db_host .= ':' . $db_port;
+            }
+            foreach (array(
+                'DB_NAME' => getenv('DB_NAME') ?: 'runtime',
+                'DB_USER' => getenv('DB_USER') ?: 'runtime',
+                'DB_PASSWORD' => getenv('DB_PASSWORD') ?: '',
+                'DB_HOST' => $db_host,
+            ) as $name => $value) {
+                $config .= 'define(' . var_export($name, true) . ', ' . var_export($value, true) . ");\n";
+            }
+        } else {
+            $config .= <<<'CONFIG'
 define('DB_NAME', ':memory:');
 define('DB_USER', 'root');
 define('DB_PASSWORD', '');
 define('DB_HOST', 'localhost');
+CONFIG;
+        }
+        $config .= <<<'CONFIG'
 define('DB_CHARSET', 'utf8');
 define('WP_TESTS_DOMAIN', 'example.org');
 define('WP_TESTS_EMAIL', 'admin@example.org');
@@ -1075,7 +1099,7 @@ if ($autoload_file_role === '' && $bootstrap_mode === 'project' && $project_auto
 }
 $harness_autoload_file = $legacy_project_autoload_file !== '' ? '/wp-codebox-vendor/autoload.php' : $autoload_file;
 
-$config_path = pg_run_boot_stage(array('extra_defines' => $wp_config_defines, 'table_prefix' => $bootstrap_mode === 'project' ? 'wp_' : 'wptests_', 'autoload_file' => $harness_autoload_file, 'autoload_required' => $bootstrap_mode !== 'project' || $harness_autoload_file !== ''));
+$config_path = pg_run_boot_stage(array('extra_defines' => $wp_config_defines, 'table_prefix' => $bootstrap_mode === 'project' ? 'wp_' : 'wptests_', 'autoload_file' => $harness_autoload_file, 'autoload_required' => $bootstrap_mode !== 'project' || $harness_autoload_file !== '', 'database_type' => $database_type));
 if ($bootstrap_mode === 'project') {
     pg_prepare_project_bootstrap_environment($config_path);
     pg_skip_project_bootstrap_shell_install();

packages/runtime-playground/src/wordpress-command-runners.ts

@@ -911,6 +911,20 @@ export async function runPhpunitCommand({
   const explicitCode = argValue(args, "code") || argValue(args, "code-file")
   const pluginSlug = argValue(args, "plugin-slug")?.trim() || ""
   const bootstrapMode = argValue(args, "bootstrap-mode")?.trim() || "managed"
+  const declaredDatabaseType = argValue(args, "database-type")?.trim()
+  if (declaredDatabaseType && declaredDatabaseType !== "sqlite" && declaredDatabaseType !== "mysql") {
+    throw new Error(`wordpress.phpunit does not support database-type=${declaredDatabaseType}; supported backends are sqlite and mysql`)
+  }
+  const externalDatabase = runtimeSpec.environment?.databaseSetup === "external"
+  const databaseType: "sqlite" | "mysql" = declaredDatabaseType === "mysql" || declaredDatabaseType === "sqlite"
+    ? declaredDatabaseType
+    : externalDatabase && runtimeSpec.runtimeEnv?.DB_HOST ? "mysql" : "sqlite"
+  if (databaseType === "mysql" && !externalDatabase) {
+    throw new Error("wordpress.phpunit requires a managed external database service when database-type=mysql; refusing to substitute SQLite")
+  }
+  if (declaredDatabaseType === "sqlite" && externalDatabase) {
+    throw new Error("wordpress.phpunit declared database-type=sqlite but the runtime uses an external database; refusing backend substitution")
+  }
   const autoloadFile = argValue(args, "autoload-file")?.trim() || (bootstrapMode === "project" ? "" : "/wp-codebox-vendor/autoload.php")
   const autoloadFileRole = argValue(args, "autoload-file-role")?.trim() === "harness" ? "harness" : undefined
   const processIdentity = boundedProcessIdentity(spec.processIdentity)
@@ -937,6 +951,7 @@ export async function runPhpunitCommand({
     bootstrapMode,
     projectBootstrap: argValue(args, "project-bootstrap")?.trim() || "",
     multisite: booleanArg(args, "multisite"),
+    databaseType,
     resultFile,
   })
   if (!explicitCode && !pluginSlug) {

tests/phpunit-project-autoload.test.ts

@@ -438,6 +438,7 @@ const projectModeCode = phpunitRunCode({
   bootstrapMode: "project",
   projectBootstrap: "tests/legacy/bootstrap.php",
   multisite: false,
+  databaseType: "sqlite",
 })
 
 const implicitProjectConfigCode = phpunitRunCode({
@@ -458,6 +459,7 @@ const implicitProjectConfigCode = phpunitRunCode({
   bootstrapMode: "project",
   projectBootstrap: "",
   multisite: false,
+  databaseType: "sqlite",
 })
 assertConfiglessPluginUsesManagedDiscovery(implicitProjectConfigCode)
 
@@ -523,6 +525,7 @@ const canonicalHarnessProjectModeCode = phpunitRunCode({
   bootstrapMode: "project",
   projectBootstrap: "tests/legacy/bootstrap.php",
   multisite: false,
+  databaseType: "sqlite",
 })
 assert.ok(canonicalHarnessProjectModeCode.includes('$autoload_file_role = "harness";'))
 assert.ok(canonicalHarnessProjectModeCode.includes('$harness_autoload_file = $legacy_project_autoload_file !== \'\' ? \'/wp-codebox-vendor/autoload.php\' : $autoload_file;'))
@@ -587,6 +590,35 @@ assert.equal((decodedExplicitCode.match(/declare\(strict_types=1\);/g) ?? []).le
 assert.ok(decodedExplicitCode.includes("echo getenv('TC_MYSQL_PORT');"), "explicit PHPUnit code receives the same runtime bootstrap")
 assert.ok(decodedExplicitCode.indexOf('putenv("TC_MYSQL_PORT=3306");') < decodedExplicitCode.lastIndexOf("TC_MYSQL_PORT"), "explicit env-json handling remains after runtime environment bootstrap")
 
+let capturedMysqlCode = ""
+await runPhpunitCommand({
+  artifactRoot: mkdtempSync(join(tmpdir(), "wp-codebox-phpunit-mysql-artifacts-")),
+  mounts: [],
+  runPlaygroundCommand: async (_command, _server, input) => {
+    capturedMysqlCode = input.code
+    return { text: "ok", exitCode: 0 }
+  },
+  runtimeSpec: {
+    environment: { kind: "wordpress", name: "test", version: "latest", databaseSetup: "external" },
+    runtimeEnv: { DB_HOST: "127.0.0.1", DB_PORT: "3307", DB_NAME: "runtime", DB_USER: "runtime", DB_PASSWORD: "secret" },
+    policy: { commands: ["wordpress.phpunit"] },
+  } as never,
+  server: { playground: {} } as never,
+  spec: { command: "wordpress.phpunit", args: ["plugin-slug=demo-plugin", "database-type=mysql"] },
+})
+const decodedMysqlCode = decodedBootstrapWrapper(capturedMysqlCode)
+assert.ok(decodedMysqlCode.includes('$database_type = "mysql";'))
+assert.ok(decodedMysqlCode.includes("'DB_HOST' => $db_host"), "managed PHPUnit writes the provisioned MySQL host into wp-tests-config.php")
+assert.ok(decodedMysqlCode.includes("getenv('DB_PASSWORD')"), "managed PHPUnit consumes the provisioned MySQL credentials")
+await assert.rejects(runPhpunitCommand({
+  artifactRoot: mkdtempSync(join(tmpdir(), "wp-codebox-phpunit-mysql-reject-")),
+  mounts: [],
+  runPlaygroundCommand: async () => { throw new Error("workload must not execute") },
+  runtimeSpec: { environment: { kind: "wordpress", name: "test", version: "latest" }, policy: { commands: ["wordpress.phpunit"] } } as never,
+  server: { playground: {} } as never,
+  spec: { command: "wordpress.phpunit", args: ["plugin-slug=demo-plugin", "database-type=mysql"] },
+}), /requires a managed external database service.*refusing to substitute SQLite/)
+
 const coreModeCode = corePhpunitRunCode({
   coreRoot: "/wordpress",
   testsDir: "/wordpress/tests/phpunit",
@@ -628,9 +660,11 @@ const managedModeCode = phpunitRunCode({
   bootstrapMode: "managed",
   projectBootstrap: "",
   multisite: false,
+  databaseType: "sqlite",
 })
 
 assert.ok(managedModeCode.includes("configured PHPUnit harness autoload file is not readable"))
+assert.ok(managedModeCode.includes("define('DB_NAME', ':memory:');"), "default managed PHPUnit remains on SQLite")
 assert.ok(managedModeCode.includes("'cacheResult' => false"))
 assert.ok(managedModeCode.includes("global $argv, $pg_stage_output_buffering, $wp_rewrite;"), "managed WordPress installation must expose the rewrite global required by multisite setup")
 assert.ok(managedModeCode.includes('$dep_mounts = "/wordpress/wp-content/plugins/demo-plugin\\n/wordpress/wp-content/plugins/dependency";'), "dependency mounts must be newline-delimited for the generated PHP runner")

tests/runtime-services.test.ts

@@ -29,6 +29,12 @@ assert.equal(validateWorkspaceRecipeJsonSchema({ schema: "wp-codebox/workspace-r
 assert.equal(runtimeServicePlan([mariaDbService])[0]?.version, "mariadb:11.4")
 assert.equal(validateWorkspaceRecipeJsonSchema({ schema: "wp-codebox/workspace-recipe/v1", inputs: { services: [{ ...service, configuration: { foreignKeyTargetPolicy: "anything" } }] }, workflow: { steps: [{ command: "wordpress.run-php" }] } }).valid, false)
 assert.deepEqual(buildWordPressPhpunitRecipe({ pluginSlug: "example", services: [emptyRootService] }).inputs?.services, [emptyRootService])
+const mysqlPhpunitRecipe = buildWordPressPhpunitRecipe({ pluginSlug: "example", databaseType: "mysql" })
+assert.deepEqual(mysqlPhpunitRecipe.inputs?.services, [{ id: "wordpress-database", kind: "mysql", outputs: { host: "DB_HOST", port: "DB_PORT", username: "DB_USER", password: "DB_PASSWORD", database: "DB_NAME" } }])
+assert.ok(mysqlPhpunitRecipe.workflow.steps[0].args?.includes("database-type=mysql"))
+const sqlitePhpunitRecipe = buildWordPressPhpunitRecipe({ pluginSlug: "example" })
+assert.equal(sqlitePhpunitRecipe.inputs?.services, undefined)
+assert.equal(sqlitePhpunitRecipe.workflow.steps[0].args?.some((arg) => arg.startsWith("database-type=")), false)
 assert.equal(buildWordPressPhpunitRecipe({ pluginSlug: "example", wordpressInstallMode: "do-not-attempt-installing" }).runtime?.wordpressInstallMode, "do-not-attempt-installing")
 const builderDirectory = await mkdtemp(join(tmpdir(), "wp-codebox-phpunit-builder-"))
 try {
@@ -37,6 +43,7 @@ try {
   await writeFile(optionsPath, JSON.stringify({
     pluginSlug: "example",
     phpVersion: "8.3",
+    databaseType: "mysql",
     extensions: [{ manifest: "./sodium/manifest.json" }],
     backendPackage: { kind: "playground", source: "./playground-cli", package: "@wp-playground/cli" },
     testRoot: "/home/example/bin/tests/core",
@@ -47,6 +54,8 @@ try {
   assert.ok(builtRecipe.workflow.steps[0].args?.includes("test-root=/home/example/bin/tests/core"))
   assert.ok(builtRecipe.workflow.steps[0].args?.includes("phpunit-xml=/home/example/bin/tests/core/phpunit.xml"))
   assert.equal(builtRecipe.runtime?.phpVersion, "8.3")
+  assert.equal(builtRecipe.inputs?.services?.[0]?.kind, "mysql")
+  assert.ok(builtRecipe.workflow.steps[0].args?.includes("database-type=mysql"))
   assert.deepEqual(builtRecipe.runtime?.extensions, [{ manifest: "./sodium/manifest.json" }])
   assert.deepEqual(builtRecipe.runtime?.backendPackage, { kind: "playground", source: "./playground-cli", package: "@wp-playground/cli" })