test: py: Add cmd_echo dependency

There is missing dependency on echo command. Mark tests which requires
echo.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>

test/py/tests/test_env.py

@@ -164,6 +164,7 @@ def test_env_echo_exists(state_test_env):
     value = state_test_env.env[var]
     validate_set(state_test_env, var, value)
 
+@pytest.mark.buildconfigspec('cmd_echo')
 def test_env_echo_non_existent(state_test_env):
     """Test echoing a variable that doesn't exist."""
 
@@ -179,6 +180,7 @@ def test_env_printenv_non_existent(state_test_env):
         response = c.run_command('printenv %s' % var)
     assert(response == '## Error: "%s" not defined' % var)
 
+@pytest.mark.buildconfigspec('cmd_echo')
 def test_env_unset_non_existent(state_test_env):
     """Test unsetting a nonexistent variable."""
 
@@ -202,6 +204,7 @@ def test_env_set_existing(state_test_env):
     set_var(state_test_env, var, value)
     validate_set(state_test_env, var, value)
 
+@pytest.mark.buildconfigspec('cmd_echo')
 def test_env_unset_existing(state_test_env):
     """Test unsetting a variable."""
 

test/py/tests/test_shell_basics.py

@@ -4,6 +4,10 @@
 
 # Test basic shell functionality, such as commands separate by semi-colons.
 
+import pytest
+
+pytestmark = pytest.mark.buildconfigspec('cmd_echo')
+
 def test_shell_execute(u_boot_console):
     """Test any shell command."""