feat: support OLM Prefix/Suffix (#1847)

* feat: support OLM Prefix/Suffix

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* updated to camel case

* fix merge

* fixed compile error

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* refactored tests

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* refactored tests

* refactored tests

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: shaffeeullah

src/bucket.ts

@@ -105,7 +105,7 @@ export interface AddLifecycleRuleOptions {
 
 export interface LifecycleRule {
   action: {type: string; storageClass?: string} | string;
-  condition: {[key: string]: boolean | Date | number | string};
+  condition: {[key: string]: boolean | Date | number | string | string[]};
   storageClass?: string;
 }
 

system-test/storage.ts

@@ -1397,6 +1397,44 @@ describe('storage', () => {
       );
     });
 
+    it('should add a prefix rule', async () => {
+      await bucket.addLifecycleRule({
+        action: 'delete',
+        condition: {
+          matchesPrefix: [TESTS_PREFIX],
+        },
+      });
+
+      assert(
+        bucket.metadata.lifecycle.rule.some(
+          (rule: LifecycleRule) =>
+            typeof rule.action === 'object' &&
+            rule.action.type === 'Delete' &&
+            typeof rule.condition.matchesPrefix === 'object' &&
+            (rule.condition.matchesPrefix as string[]).length === 1 &&
+            Array.isArray(rule.condition.matchesPrefix)
+        )
+      );
+    });
+
+    it('should add a suffix rule', async () => {
+      await bucket.addLifecycleRule({
+        action: 'delete',
+        condition: {
+          matchesSuffix: [TESTS_PREFIX, 'test_suffix'],
+        },
+      });
+
+      assert(
+        bucket.metadata.lifecycle.rule.some(
+          (rule: LifecycleRule) =>
+            typeof rule.action === 'object' &&
+            rule.action.type === 'Delete' &&
+            Array.isArray(rule.condition.matchesPrefix)
+        )
+      );
+    });
+
     it('should convert a rule with createdBefore to a date in string', done => {
       bucket.addLifecycleRule(
         {