Add cli test for slashing (#6102)

Reference: #5951

x/slashing/client/cli/cli_test.go

@@ -0,0 +1,33 @@
+// +build cli_test
+
+package cli_test
+
+import (
+	"github.com/cosmos/cosmos-sdk/x/slashing/client/testutil"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	cli "github.com/cosmos/cosmos-sdk/tests/cli"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+func TestCLISlashingGetParams(t *testing.T) {
+	t.Parallel()
+	f := cli.InitFixtures(t)
+
+	// start simd server
+	proc := f.SDStart()
+	defer proc.Stop(false)
+
+	params := testutil.QuerySlashingParams(f)
+	require.Equal(t, int64(100), params.SignedBlocksWindow)
+	require.Equal(t, sdk.NewDecWithPrec(5, 1), params.MinSignedPerWindow)
+
+	sinfo := testutil.QuerySigningInfo(f, f.SDTendermint("show-validator"))
+	require.Equal(t, int64(0), sinfo.StartHeight)
+	require.False(t, sinfo.Tombstoned)
+
+	// Cleanup testing directories
+	f.Cleanup()
+}