Add initial containerd *Client

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

spec_unix_test.go

@@ -0,0 +1,56 @@
+package containerd
+
+import "testing"
+
+func TestGenerateSpec(t *testing.T) {
+	s, err := GenerateSpec()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if s == nil {
+		t.Fatal("GenerateSpec() returns a nil spec")
+	}
+
+	// check for matching caps
+	defaults := defaltCaps()
+	for _, cl := range [][]string{
+		s.Process.Capabilities.Ambient,
+		s.Process.Capabilities.Bounding,
+		s.Process.Capabilities.Permitted,
+		s.Process.Capabilities.Inheritable,
+		s.Process.Capabilities.Effective,
+	} {
+		for i := 0; i < len(defaults); i++ {
+			if cl[i] != defaults[i] {
+				t.Errorf("cap at %d does not match set %q != %q", i, defaults[i], cl[i])
+			}
+		}
+	}
+
+	// check default namespaces
+	defaultNS := defaultNamespaces()
+	for i, ns := range s.Linux.Namespaces {
+		if defaultNS[i] != ns {
+			t.Errorf("ns at %d does not match set %q != %q", i, defaultNS[i], ns)
+		}
+	}
+
+	// test that we don't have tty set
+	if s.Process.Terminal {
+		t.Error("terminal set on default process")
+	}
+}
+
+func TestSpecWithTTY(t *testing.T) {
+	s, err := GenerateSpec(WithTTY)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !s.Process.Terminal {
+		t.Error("terminal net set WithTTY()")
+	}
+	v := s.Process.Env[len(s.Process.Env)-1]
+	if v != "TERM=xterm" {
+		t.Errorf("xterm not set in env for TTY")
+	}
+}