Use a map to configure Docker arguments

config/docker_config_test.go

@@ -0,0 +1,48 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+)
+
+func testContains(t *testing.T, s string, substrs ...string) {
+	for _, substr := range substrs {
+		if !strings.Contains(s, substr) {
+			t.Fail()
+		}
+	}
+}
+
+func TestGenerateEngineOptsString(t *testing.T) {
+	if len(generateEngineOptsSlice(EngineOpts{})) != 0 {
+		t.Fail()
+	}
+
+	testContains(t, fmt.Sprint(generateEngineOptsSlice(EngineOpts{
+		Bridge: "bridge",
+	})), "--bridge bridge")
+
+	testContains(t, fmt.Sprint(generateEngineOptsSlice(EngineOpts{
+		SelinuxEnabled: &[]bool{true}[0],
+	})), "--selinux-enabled")
+	testContains(t, fmt.Sprint(generateEngineOptsSlice(EngineOpts{
+		SelinuxEnabled: &[]bool{false}[0],
+	})), "--selinux-enabled=false")
+
+	testContains(t, fmt.Sprint(generateEngineOptsSlice(EngineOpts{
+		LogOpts: map[string]string{
+			"max-size": "25m",
+			"max-file": "2",
+		},
+	})), "--log-opt max-size=25m", "--log-opt max-file=2")
+
+	testContains(t, fmt.Sprint(generateEngineOptsSlice(EngineOpts{
+		Bridge:         "bridge",
+		SelinuxEnabled: &[]bool{true}[0],
+		LogOpts: map[string]string{
+			"max-size": "25m",
+			"max-file": "2",
+		},
+	})), "--bridge bridge", "--selinux-enabled", "--log-opt max-size=25m", "--log-opt max-file=2")
+}