feat(supported-version): add service_preferences and support for php-fpm and nginx (#255)

supported-version/src/services/preferences/parse-service-preferences.spec.ts

@@ -0,0 +1,50 @@
+import { parseServicePreferences } from './parse-service-preferences';
+
+describe('parseServicePreferences', () => {
+  it('returns an empty map when input is empty', () => {
+    expect(parseServicePreferences('')).toEqual({});
+  });
+
+  it('returns an empty map for whitespace-only input', () => {
+    expect(parseServicePreferences('   ')).toEqual({});
+  });
+
+  it('maps a single name to its tier', () => {
+    expect(parseServicePreferences('opensearch')).toEqual({ search: 'opensearch' });
+  });
+
+  it('maps two names in different tiers', () => {
+    expect(parseServicePreferences('elasticsearch,valkey')).toEqual({
+      search: 'elasticsearch',
+      cache: 'valkey',
+    });
+  });
+
+  it('accepts single-implementation-tier names as no-op-like preferences', () => {
+    expect(parseServicePreferences('mysql,rabbitmq')).toEqual({
+      db: 'mysql',
+      queue: 'rabbitmq',
+    });
+  });
+
+  it('tolerates whitespace around names', () => {
+    expect(parseServicePreferences(' opensearch , valkey ')).toEqual({
+      search: 'opensearch',
+      cache: 'valkey',
+    });
+  });
+
+  it('throws on unknown service name', () => {
+    expect(() => parseServicePreferences('foobar')).toThrowError(/unknown service "foobar"/);
+  });
+
+  it('throws on a collision in the search tier', () => {
+    expect(() => parseServicePreferences('elasticsearch,opensearch')).toThrowError(
+      /collision in tier "search"/
+    );
+  });
+
+  it('throws on a collision in the cache tier', () => {
+    expect(() => parseServicePreferences('redis,valkey')).toThrowError(/collision in tier "cache"/);
+  });
+});