Fixed file modified time not changing on Windows

Signed-off-by: Darren Stahl <darst@microsoft.com>

system/meminfo_unix_test.go

@@ -0,0 +1,40 @@
+// +build linux freebsd
+
+package system
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/docker/docker/pkg/units"
+)
+
+// TestMemInfo tests parseMemInfo with a static meminfo string
+func TestMemInfo(t *testing.T) {
+	const input = `
+	MemTotal:      1 kB
+	MemFree:       2 kB
+	SwapTotal:     3 kB
+	SwapFree:      4 kB
+	Malformed1:
+	Malformed2:    1
+	Malformed3:    2 MB
+	Malformed4:    X kB
+	`
+	meminfo, err := parseMemInfo(strings.NewReader(input))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if meminfo.MemTotal != 1*units.KiB {
+		t.Fatalf("Unexpected MemTotal: %d", meminfo.MemTotal)
+	}
+	if meminfo.MemFree != 2*units.KiB {
+		t.Fatalf("Unexpected MemFree: %d", meminfo.MemFree)
+	}
+	if meminfo.SwapTotal != 3*units.KiB {
+		t.Fatalf("Unexpected SwapTotal: %d", meminfo.SwapTotal)
+	}
+	if meminfo.SwapFree != 4*units.KiB {
+		t.Fatalf("Unexpected SwapFree: %d", meminfo.SwapFree)
+	}
+}