x/auth: turn sign --validate-sigantures into a standalone command (#6108)

--validate-signatures should not be a flag of the sign command
as the operation performed (transaction signatures verification)
is logically distinct.

cli_test is and has always been an horrible name for package
directory as it's very much Go anti-idiomatic - _test is the
suffix used by test packages, not directories. Plus, CLI test
cases can and should live alongside other testcases that don't
require binaries to be built beforehand. Thus:

x/module/client/cli_test/*.go -> x/module/client/cli/

Test files that require sim{cli,d} shall be tagged with // +build cli_test

With regard to cli test auxiliary functions, they should live in:

x/module/client/testutil/

Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>

tests/cli/helpers.go

@@ -6,7 +6,6 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
-	"testing"
 
 	"github.com/stretchr/testify/require"
 
@@ -182,7 +181,14 @@ func AddFlags(cmd string, flags []string) string {
 	return strings.TrimSpace(cmd)
 }
 
-func UnmarshalStdTx(t *testing.T, c *codec.Codec, s string) (stdTx auth.StdTx) {
+func UnmarshalStdTx(t require.TestingT, c *codec.Codec, s string) (stdTx auth.StdTx) {
 	require.Nil(t, c.UnmarshalJSON([]byte(s), &stdTx))
 	return
 }
+
+func MarshalStdTx(t require.TestingT, c *codec.Codec, stdTx auth.StdTx) []byte {
+	bz, err := c.MarshalBinaryBare(stdTx)
+	require.NoError(t, err)
+
+	return bz
+}

tests/cli/simd_test.go

@@ -1,20 +1,24 @@
+// +build cli_test
+
 package cli_test
 
 import (
 	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	tmtypes "github.com/tendermint/tendermint/types"
+
 	"github.com/cosmos/cosmos-sdk/std"
 	"github.com/cosmos/cosmos-sdk/tests/cli"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth"
 	"github.com/cosmos/cosmos-sdk/x/bank"
-	"github.com/stretchr/testify/require"
-	tmtypes "github.com/tendermint/tendermint/types"
-	"io/ioutil"
-	"path/filepath"
-	"testing"
 )
 
-func TestSimdCollectGentxs(t *testing.T) {
+func TestCLISimdCollectGentxs(t *testing.T) {
 	t.Parallel()
 	var customMaxBytes, customMaxGas int64 = 99999999, 1234567
 	f := cli.NewFixtures(t)
@@ -62,7 +66,7 @@ func TestSimdCollectGentxs(t *testing.T) {
 	f.Cleanup(gentxDir)
 }
 
-func TestSimdAddGenesisAccount(t *testing.T) {
+func TestCLISimdAddGenesisAccount(t *testing.T) {
 	t.Parallel()
 	f := cli.NewFixtures(t)
 
@@ -113,7 +117,7 @@ func TestSimdAddGenesisAccount(t *testing.T) {
 	f.Cleanup()
 }
 
-func TestValidateGenesis(t *testing.T) {
+func TestCLIValidateGenesis(t *testing.T) {
 	t.Parallel()
 	f := cli.InitFixtures(t)