Add dummy tests and --single for faster CI testing

Add dummy test files for moduleapi and sentinel suites.
Use --single to run only dummy tests in CI for quick pipeline validation.

Signed-off-by: Hanxi Zhang <hanxizh@amazon.com>

Author: hanxizh9910

.github/workflows/daily.yml

@@ -125,7 +125,7 @@ jobs:
         run: CFLAGS='-Werror' ./runtest-moduleapi --single unit/moduleapi/dummy-flaky --failures-json test-failures/moduleapi.json --verbose --dump-logs ${{github.event.inputs.test_args}}
       - name: sentinel tests
         if: true && !contains(github.event.inputs.skiptests, 'sentinel')
-        run: ./runtest-sentinel --failures-json test-failures/sentinel.json ${{github.event.inputs.cluster_test_args}}
+        run: ./runtest-sentinel --single dummy --failures-json test-failures/sentinel.json ${{github.event.inputs.cluster_test_args}}
       - name: cluster tests
         if: true && !contains(github.event.inputs.skiptests, 'cluster')
         run: ./runtest-cluster --failures-json test-failures/cluster.json ${{github.event.inputs.cluster_test_args}}
@@ -1925,7 +1925,7 @@ jobs:
         run: CFLAGS='-Werror' ./runtest-moduleapi --single unit/moduleapi/dummy-flaky --failures-json test-failures/moduleapi.json --log-req-res --no-latency --dont-clean --force-resp3 --dont-pre-clean --verbose --dump-logs ${{github.event.inputs.test_args}}
       - name: sentinel tests
         if: true && !contains(github.event.inputs.skiptests, 'sentinel')
-        run: ./runtest-sentinel --failures-json test-failures/sentinel.json --log-req-res --dont-clean --force-resp3 ${{github.event.inputs.cluster_test_args}}
+        run: ./runtest-sentinel --single dummy --failures-json test-failures/sentinel.json --log-req-res --dont-clean --force-resp3 ${{github.event.inputs.cluster_test_args}}
       - name: cluster tests
         if: true && !contains(github.event.inputs.skiptests, 'cluster')
         run: ./runtest-cluster --failures-json test-failures/cluster.json --log-req-res --dont-clean --force-resp3 ${{github.event.inputs.cluster_test_args}}

tests/cluster/tests/03-failover-loop.tcl

@@ -10,7 +10,7 @@ test "Create a 5 nodes cluster" {
 }
 
 test "Cluster is up" {
-    assert_cluster_state ok
+    assert_cluster_state okk
 }
 
 set iterations 20

tests/sentinel/tests/99-dummy-flaky.tcl

@@ -0,0 +1,11 @@
+test "sentinel-dummy - basic ping" {
+    assert_equal {PONG} [S 0 PING]
+}
+
+#test "sentinel-dummy - intentional failure" {
+#    assert_equal "wrong" [S 0 PING]
+#}
+
+test "sentinel-dummy - another passing test" {
+    assert_equal {PONG} [S 1 PING]
+}