validation: test linux_cgroups_memory with different values

Test memory cgroups with different values for memory limit
as well as swappiness.

Signed-off-by: Dongsu Park <dongsu@kinvolk.io>

validation/linux_cgroups_memory.go

@@ -1,33 +1,52 @@
 package main
 
 import (
+	"fmt"
+	"runtime"
+
 	"github.com/mndrix/tap-go"
 	"github.com/opencontainers/runtime-tools/cgroups"
 	"github.com/opencontainers/runtime-tools/validation/util"
 )
 
 func main() {
-	var limit int64 = 50593792
-	var swappiness uint64 = 50
+	if "linux" != runtime.GOOS {
+		util.Fatal(fmt.Errorf("linux-specific cgroup test"))
+	}
 
 	t := tap.New()
 	t.Header(0)
-	defer t.AutoPlan()
 
-	g, err := util.GetDefaultGenerator()
-	if err != nil {
-		util.Fatal(err)
+	cases := []struct {
+		limit      int64
+		swappiness uint64
+	}{
+		{50593792, 10},
+		{50593792, 50},
+		{50593792, 100},
+		{151781376, 10},
+		{151781376, 50},
+		{151781376, 100},
 	}
-	g.SetLinuxCgroupsPath(cgroups.AbsCgroupPath)
-	g.SetLinuxResourcesMemoryLimit(limit)
-	g.SetLinuxResourcesMemoryReservation(limit)
-	g.SetLinuxResourcesMemorySwap(limit)
-	g.SetLinuxResourcesMemoryKernel(limit)
-	g.SetLinuxResourcesMemoryKernelTCP(limit)
-	g.SetLinuxResourcesMemorySwappiness(swappiness)
-	g.SetLinuxResourcesMemoryDisableOOMKiller(true)
-	err = util.RuntimeOutsideValidate(g, t, util.ValidateLinuxResourcesMemory)
-	if err != nil {
-		util.Fatal(err)
+
+	for _, c := range cases {
+		g, err := util.GetDefaultGenerator()
+		if err != nil {
+			util.Fatal(err)
+		}
+		g.SetLinuxCgroupsPath(cgroups.AbsCgroupPath)
+		g.SetLinuxResourcesMemoryLimit(c.limit)
+		g.SetLinuxResourcesMemoryReservation(c.limit)
+		g.SetLinuxResourcesMemorySwap(c.limit)
+		g.SetLinuxResourcesMemoryKernel(c.limit)
+		g.SetLinuxResourcesMemoryKernelTCP(c.limit)
+		g.SetLinuxResourcesMemorySwappiness(c.swappiness)
+		g.SetLinuxResourcesMemoryDisableOOMKiller(true)
+		err = util.RuntimeOutsideValidate(g, t, util.ValidateLinuxResourcesMemory)
+		if err != nil {
+			t.Fail(err.Error())
+		}
 	}
+
+	t.AutoPlan()
 }