[YUNIKORN-2998] add test case

coverage.out

@@ -0,0 +1 @@
+mode: set

pkg/scheduler/objects/application_test.go

@@ -3627,17 +3627,26 @@ func TestTryNodesNoReserve(t *testing.T) {
 	assert.Assert(t, result == nil, "result should be nil since node2 is unschedulable")
 
 	// case 3: node does not have enough resources
-	node3 := newNode("node-3", map[string]resources.Quantity{"first": 1})
+	node3 := newNode(nodeID3, map[string]resources.Quantity{"first": 1})
 	iterator = getNodeIteratorFn(node3)
 	result = app.tryNodesNoReserve(ask, iterator(), node1.NodeID)
 	assert.Assert(t, result == nil, "result should be nil since node3 does not have enough resources")
 
-	// case 4: success
-	node4 := newNode("node-4", map[string]resources.Quantity{"first": 5})
+	// case 4: node fails predicate
+	mockPlugin := mockCommon.NewPredicatePlugin(false, map[string]int{nodeID4: 1})
+	plugins.RegisterSchedulerPlugin(mockPlugin)
+	defer plugins.UnregisterSchedulerPlugins()
+	node4 := newNode(nodeID4, map[string]resources.Quantity{"first": 5})
 	iterator = getNodeIteratorFn(node4)
 	result = app.tryNodesNoReserve(ask, iterator(), node1.NodeID)
+	assert.Assert(t, result == nil, "result should be nil since node4 fails predicate")
+
+	// case 5: success
+	node5 := newNode(nodeID5, map[string]resources.Quantity{"first": 5})
+	iterator = getNodeIteratorFn(node5)
+	result = app.tryNodesNoReserve(ask, iterator(), node1.NodeID)
 	assert.Assert(t, result != nil, "result should not be nil")
-	assert.Equal(t, node4.NodeID, result.NodeID, "result should be on node4")
+	assert.Equal(t, node5.NodeID, result.NodeID, "result should be on node5")
 	assert.Equal(t, result.ResultType, AllocatedReserved, "result type should be AllocatedReserved")
 	assert.Equal(t, result.ReservedNodeID, node1.NodeID, "reserved node should be node1")
 }