Add more container cp tests

Signed-off-by: Daniel Nephin <dnephin@docker.com>

cli/command/container/cp_test.go

@@ -3,6 +3,7 @@ package container
 import (
 	"io"
 	"io/ioutil"
+	"os"
 	"runtime"
 	"strings"
 	"testing"
@@ -111,6 +112,33 @@ func TestRunCopyFromContainerToFilesystemMissingDestinationDirectory(t *testing.
 	testutil.ErrorContains(t, err, destDir.Join("missing"))
 }
 
+func TestRunCopyToContainerFromFileWithTrailingSlash(t *testing.T) {
+	srcFile := fs.NewFile(t, t.Name())
+	defer srcFile.Remove()
+
+	options := copyOptions{
+		source:      srcFile.Path() + string(os.PathSeparator),
+		destination: "container:/path",
+	}
+	cli := test.NewFakeCli(&fakeClient{})
+	err := runCopy(cli, options)
+	testutil.ErrorContains(t, err, "not a directory")
+}
+
+func TestRunCopyToContainerSourceDoesNotExist(t *testing.T) {
+	options := copyOptions{
+		source:      "/does/not/exist",
+		destination: "container:/path",
+	}
+	cli := test.NewFakeCli(&fakeClient{})
+	err := runCopy(cli, options)
+	expected := "no such file or directory"
+	if runtime.GOOS == "windows" {
+		expected = "cannot find the file specified"
+	}
+	testutil.ErrorContains(t, err, expected)
+}
+
 func TestSplitCpArg(t *testing.T) {
 	var testcases = []struct {
 		doc               string