Drop hardcoded DATABASE_VERSION from database_version spec

The "should get database version" spec compared PLSQL::Connection
#database_version against a DATABASE_VERSION env var set in each
workflow. The value was brittle: the test.yml / test_gemfiles.yml
rows hardcoded "23.26.1.0" (the Instant Client version), which
couples the spec to a manually maintained string that has to track
whichever gvenzl/oracle-free container is currently in use.

Drop the env var dependency and assert the structural shape instead
(an Array of four Integers) so the spec remains meaningful across
Oracle Database releases without a hardcoded version to maintain.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

.github/workflows/test.yml

@@ -29,7 +29,6 @@ jobs:
       DATABASE_NAME: FREEPDB1
       TZ: Europe/Riga
       DATABASE_SYS_PASSWORD: Oracle18
-      DATABASE_VERSION: 23.26.1.0
 
     services:
       oracle:

.github/workflows/test_11g.yml

@@ -29,7 +29,6 @@ jobs:
       DATABASE_NAME: XE
       TZ: Europe/Riga
       DATABASE_SYS_PASSWORD: Oracle18
-      DATABASE_VERSION: 11.2.0.2
 
     services:
       oracle:

.github/workflows/test_gemfiles.yml

@@ -43,7 +43,6 @@ jobs:
       DATABASE_NAME: FREEPDB1
       TZ: Europe/Riga
       DATABASE_SYS_PASSWORD: Oracle18
-      DATABASE_VERSION: 23.26.1.0
 
     services:
       oracle:

spec/plsql/connection_spec.rb

@@ -422,8 +422,10 @@
 
   describe "session information" do
     it "should get database version" do
-      # using Oracle version 10.2.0.4 for unit tests
-      expect(@conn.database_version).to eq DATABASE_VERSION.split(".").map { |n| n.to_i }
+      version = @conn.database_version
+      expect(version).to be_an(Array)
+      expect(version.size).to eq(4)
+      expect(version).to all(be_a(Integer))
     end
 
     it "should get session ID" do

spec/spec_helper.rb

@@ -53,19 +53,10 @@
   [ENV["DATABASE_USER"] || "hr", ENV["DATABASE_PASSWORD"] || "hr"],
   [ENV["DATABASE_USER2"] || "arunit", ENV["DATABASE_PASSWORD2"] || "arunit"]
 ]
-# specify which database version is used (will be verified in one test)
-DATABASE_VERSION = ENV["DATABASE_VERSION"] || "10.2.0.4"
-
 if ENV["USE_VM_DATABASE"] == "Y"
   RSpec.configure do |config|
     config.before(:suite) do
       TestDb.build
-
-      # Set Verbose off to hide warning: already initialized constant DATABASE_VERSION
-      original_verbosity = $VERBOSE
-      $VERBOSE           = nil
-      DATABASE_VERSION   = TestDb.database_version
-      $VERBOSE           = original_verbosity
     end
   end
 end