healthfilter unit test

Signed-off-by: Xian Chaobo <xianchaobo@huawei.com>

scheduler/filter/health_test.go

@@ -0,0 +1,83 @@
+package filter
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/docker/swarm/cluster"
+	"github.com/docker/swarm/scheduler/node"
+	"github.com/stretchr/testify/assert"
+)
+
+func testFixturesAllHealthyNode() []*node.Node {
+	return []*node.Node{
+		{
+			ID:        "node-0-id",
+			Name:      "node-0-name",
+			IsHealthy: true,
+		},
+
+		{
+			ID:        "node-1-id",
+			Name:      "node-1-name",
+			IsHealthy: true,
+		},
+	}
+}
+
+func testFixturesPartHealthyNode() []*node.Node {
+	return []*node.Node{
+		{
+			ID:        "node-0-id",
+			Name:      "node-0-name",
+			IsHealthy: false,
+		},
+
+		{
+			ID:        "node-1-id",
+			Name:      "node-1-name",
+			IsHealthy: true,
+		},
+	}
+}
+
+func testFixturesNoHealthyNode() []*node.Node {
+	return []*node.Node{
+		{
+			ID:        "node-0-id",
+			Name:      "node-0-name",
+			IsHealthy: false,
+		},
+
+		{
+			ID:        "node-1-id",
+			Name:      "node-1-name",
+			IsHealthy: false,
+		},
+	}
+}
+
+func TestHealthyFilter(t *testing.T) {
+	var (
+		f                         = HealthFilter{}
+		nodesAllHealth            = testFixturesAllHealthyNode()
+		nodesPartHealth           = testFixturesPartHealthyNode()
+		nodesNoHealth             = testFixturesNoHealthyNode()
+		errNoHealthyNodeAvailable = errors.New("No healthy node available in the cluster")
+		result                    []*node.Node
+		err                       error
+	)
+
+	result, err = f.Filter(&cluster.ContainerConfig{}, nodesAllHealth)
+	assert.NoError(t, err)
+	assert.Equal(t, result, nodesAllHealth)
+
+	result, err = f.Filter(&cluster.ContainerConfig{}, nodesPartHealth)
+	assert.NoError(t, err)
+	assert.Len(t, result, 1)
+	assert.Equal(t, result[0], nodesPartHealth[1])
+
+	result, err = f.Filter(&cluster.ContainerConfig{}, nodesNoHealth)
+	assert.Equal(t, err, errNoHealthyNodeAvailable)
+	assert.Nil(t, result)
+}