Fix bug with partial Hiredis availability

Author: vladvildanov

.github/workflows/integration.yaml

@@ -90,6 +90,21 @@ jobs:
           invoke ${{matrix.test-type}}-tests
           ls -1
 
+      - name: Run tests against hiredis < 3.0.0
+        if: ${{ matrix.connection-type == 'hiredis' && matrix.python-version == '3.12'}}
+        run: |
+          pip uninstall hiredis
+          pip install -U setuptools wheel
+          pip install -r requirements.txt
+          pip install -r dev_requirements.txt
+          if [ "${{matrix.connection-type}}" == "hiredis" ]; then
+           pip install "hiredis<3.0.0"
+          fi
+          invoke devenv
+          sleep 10 # time to settle
+          invoke ${{matrix.test-type}}-tests
+          ls -1
+
       - name: Upload test results and profiling data
         uses: actions/upload-artifact@v4
         with:
@@ -145,6 +160,24 @@ jobs:
             invoke ${{matrix.test-type}}-tests --protocol=3
           fi
 
+      - name: Run tests against hiredis < 3.0.0
+        if: ${{ matrix.connection-type == 'hiredis' && matrix.python-version == '3.12'}}
+        run: |
+          pip uninstall hiredis
+          pip install -U setuptools wheel
+          pip install -r requirements.txt
+          pip install -r dev_requirements.txt
+          if [ "${{matrix.connection-type}}" == "hiredis" ]; then
+            pip install "hiredis<3.0.0"
+          fi
+          invoke devenv
+          sleep 10 # time to settle
+          if [ "${{matrix.event-loop}}" == "uvloop" ]; then
+            invoke ${{matrix.test-type}}-tests --uvloop --protocol=3
+          else
+            invoke ${{matrix.test-type}}-tests --protocol=3
+          fi
+
       - name: Upload test results and profiling data
         uses: actions/upload-artifact@v4
         with:

redis/utils.py

@@ -8,7 +8,11 @@
 
     # Only support Hiredis >= 3.0:
     HIREDIS_AVAILABLE = int(hiredis.__version__.split(".")[0]) >= 3
+    if not HIREDIS_AVAILABLE:
+        raise ImportError("hiredis package should be >= 3.0.0")
     HIREDIS_PACK_AVAILABLE = hasattr(hiredis, "pack_command")
+    if not HIREDIS_PACK_AVAILABLE:
+        raise ImportError("pack_command is not available in the current version of hiredis.")
 except ImportError:
     HIREDIS_AVAILABLE = False
     HIREDIS_PACK_AVAILABLE = False