Windows CI: test-unit on pkg\plugins

Signed-off-by: John Howard <jhoward@microsoft.com>

plugins/discovery_unix_test.go

@@ -0,0 +1,61 @@
+// +build !windows
+
+package plugins
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+)
+
+func TestLocalSocket(t *testing.T) {
+	// TODO Windows: Enable a similar version for Windows named pipes
+	tmpdir, unregister := Setup(t)
+	defer unregister()
+
+	cases := []string{
+		filepath.Join(tmpdir, "echo.sock"),
+		filepath.Join(tmpdir, "echo", "echo.sock"),
+	}
+
+	for _, c := range cases {
+		if err := os.MkdirAll(filepath.Dir(c), 0755); err != nil {
+			t.Fatal(err)
+		}
+
+		l, err := net.Listen("unix", c)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		r := newLocalRegistry()
+		p, err := r.Plugin("echo")
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		pp, err := r.Plugin("echo")
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !reflect.DeepEqual(p, pp) {
+			t.Fatalf("Expected %v, was %v\n", p, pp)
+		}
+
+		if p.Name != "echo" {
+			t.Fatalf("Expected plugin `echo`, got %s\n", p.Name)
+		}
+
+		addr := fmt.Sprintf("unix://%s", c)
+		if p.Addr != addr {
+			t.Fatalf("Expected plugin addr `%s`, got %s\n", addr, p.Addr)
+		}
+		if p.TLSConfig.InsecureSkipVerify != true {
+			t.Fatalf("Expected TLS verification to be skipped")
+		}
+		l.Close()
+	}
+}