Added rspec testing. It should work, but doesn't for unknown reasons

Gemfile.lock

@@ -4,6 +4,7 @@ GEM
     ast (2.4.3)
     base64 (0.3.0)
     bigdecimal (3.2.2)
+    diff-lcs (1.6.2)
     ffi (1.17.2-aarch64-linux-gnu)
     ffi (1.17.2-aarch64-linux-musl)
     ffi (1.17.2-arm-linux-gnu)
@@ -41,6 +42,8 @@ GEM
     rack-session (2.1.1)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
     rainbow (3.1.1)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
@@ -48,6 +51,19 @@ GEM
     regexp_parser (2.10.0)
     rerun (0.14.0)
       listen (~> 3.0)
+    rspec (3.13.1)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.5)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.4)
     rubocop (1.76.1)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
@@ -112,7 +128,9 @@ PLATFORMS
 DEPENDENCIES
   logger
   puma (~> 6.6)
+  rack-test
   rerun
+  rspec
   rubocop
   rubocop-sequel
   sequel (~> 5.92)