fix(tests): make jest tests run again

Signed-off-by: Erik Michelson <github@erik.michelson.eu>

backend/jest.tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "isolatedModules": true
+  },
+  "include": ["src/**/*.ts", "test/**/*.ts"]
+}

backend/jest.tsconfig.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2026 The HedgeDoc developers (see AUTHORS file)
+
+SPDX-License-Identifier: CC0-1.0

backend/package.json

@@ -116,7 +116,7 @@
       "^.+\\.(t|j)s$": [
         "ts-jest",
         {
-          "tsconfig": "test/tsconfig.json",
+          "tsconfig": "jest.tsconfig.json",
           "diagnostics": {
             "ignoreCodes": [
               151002
@@ -125,6 +125,10 @@
         }
       ]
     },
+    "transformIgnorePatterns": [
+      "/node_modules/",
+      "<rootDir>/../commons/dist/cjs/"
+    ],
     "coverageDirectory": "../coverage",
     "testEnvironment": "node",
     "reporters": [

backend/src/frontend-config/frontend-config.service.spec.ts

@@ -153,6 +153,7 @@ describe('FrontendConfigService', () => {
             type: AuthProviderType.LDAP,
             providerName: authConfig.ldap[0].providerName,
             identifier: authConfig.ldap[0].identifier,
+            theme: null,
           });
         }
         if (authConfig.oidc.length > 0) {
@@ -162,6 +163,7 @@ describe('FrontendConfigService', () => {
             type: AuthProviderType.OIDC,
             providerName: authConfig.oidc[0].providerName,
             identifier: authConfig.oidc[0].identifier,
+            theme: null,
           });
         }
       });

backend/tsconfig.json

@@ -11,7 +11,6 @@
     "outDir": "./dist",
     "incremental": true,
     "strict": true,
-    "strictNullChecks": true,
     "strictPropertyInitialization": false,
     "resolveJsonModule": true,
     "useDefineForClassFields": false,