Fix CI env variables

.github/workflows/test.yml

@@ -18,29 +18,31 @@ jobs:
           ### TEST RUBY VERSIONS
           - ruby: "2.7"
           - ruby: "3.0"
+            db_gem_version: "~> 1.4" # fixes sqlite3 gem dependency issue
           - ruby: "3.1"
           - ruby: "3.2"
           - ruby: "3.3"
           ### TEST RAILS VERSIONS
           - ruby: "2.7"
-            env:
-              RAILS_VERSION: "6.0"
+            rails_version: "~> 6.0"
           - ruby: "2.7"
-            env:
-              RAILS_VERSION: "6.1"
+            rails_version: "~> 6.1"
           - ruby: "3.3"
-            env:
-              RAILS_VERSION: "7.0"
+            rails_version: "~> 7.0"
           - ruby: "3.3"
-            env:
-              RAILS_VERSION: "7.1"
+            rails_version: "~> 7.1"
           - ruby: "3.3"
-            env:
-              RAILS_VERSION: "7.2"
+            rails_version: "~> 7.2"
 
     steps:
     - uses: actions/checkout@v3
 
+    - name: Set env variables
+      run: |
+        echo "RAILS_VERSION=${{ matrix.rails_version }}" >> "$GITHUB_ENV"
+        echo "DB_GEM=${{ matrix.db_gem }}" >> "$GITHUB_ENV"
+        echo "DB_GEM_VERSION=${{ matrix.db_gem_version }}" >> "$GITHUB_ENV"
+
     - name: Install ruby
       uses: ruby/setup-ruby@v1
       with:

Gemfile

@@ -20,12 +20,11 @@ end
 
 gem "rails", get_env("RAILS_VERSION")
 
+db_gem = get_env("DB_GEM") || "sqlite3"
+gem db_gem, get_env("DB_GEM_VERSION")
 
 if get_env("RAILS_VERSION").to_f >= 7.2
   gem "activerecord-enhancedsqlite3-adapter"
-  gem "sqlite3", "~> 2.0"
-else
-  gem "sqlite3", "~> 1.7"
 end
 
 group :development do

spec/rails_helper.rb

@@ -22,3 +22,35 @@
 
   config.filter_rails_from_backtrace!
 end
+
+if Rails::VERSION::MAJOR <= 6
+  ActiveSupport::Testing::Assertions.module_eval do
+    def assert_difference(expression, *args, &block)
+      expressions =
+        if expression.is_a?(Hash)
+          message = args[0]
+          expression
+        else
+          difference = args[0] || 1
+          message = args[1]
+          Array(expression).index_with(difference)
+        end
+
+      exps = expressions.keys.map { |e|
+        e.respond_to?(:call) ? e : lambda { eval(e, block.binding) }
+      }
+      before = exps.map(&:call)
+
+      retval = _assert_nothing_raised_or_warn("assert_difference", &block)
+
+      expressions.zip(exps, before) do |(code, diff), exp, before_value|
+        actual = exp.call
+        error  = "#{code.inspect} didn't change by #{diff}, but by #{actual - before_value}"
+        error  = "#{message}.\n#{error}" if message
+        assert_equal(before_value + diff, actual, error)
+      end
+
+      retval
+    end
+  end
+end