[U-Boot] [PATCH V2 3/7] test/py: add test of setenv/printenv/echo

[Stephen Warren]

This tests basic environment variable functionality.

Signed-off-by: Stephen Warren <swarren at wwwdotorg.org>
Signed-off-by: Stephen Warren <swarren at nvidia.com>
---
 test/py/test_env.py | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 test/py/test_env.py

diff --git a/test/py/test_env.py b/test/py/test_env.py
new file mode 100644
index 000000000000..3af0176c4523
--- /dev/null
+++ b/test/py/test_env.py
@@ -0,0 +1,121 @@
+# Copyright (c) 2015 Stephen Warren
+# Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+#
+# SPDX-License-Identifier: GPL-2.0
+
+import pytest
+
+# FIXME: This might be useful for other tests;
+# perhaps refactor it into ConsoleBase or some other state object?
+class StateTestEnv(object):
+    def __init__(self, uboot_console):
+        self.uboot_console = uboot_console
+        self.get_env()
+        self.set_var = self.get_non_existent_var()
+
+    def get_env(self):
+        response = self.uboot_console.run_command("printenv")
+        self.env = {}
+        for l in response.splitlines():
+            if not "=" in l:
+                continue
+            (var, value) = l.strip().split("=")
+            self.env[var] = value
+
+    def get_existent_var(self):
+        for var in self.env:
+            return var
+
+    def get_non_existent_var(self):
+        n = 0
+        while True:
+            var = "test_env_" + str(n)
+            if var not in self.env:
+                return var
+            n += 1
+
+ at pytest.fixture(scope="module")
+def state_test_env(uboot_console):
+    return StateTestEnv(uboot_console)
+
+def unset_var(state_test_env, var):
+    state_test_env.uboot_console.run_command("setenv " + var)
+    if var in state_test_env.env:
+        del state_test_env.env[var]
+
+def set_var(state_test_env, var, value):
+    state_test_env.uboot_console.run_command("setenv " + var + " \"" + value + "\"")
+    state_test_env.env[var] = value
+
+def validate_empty(state_test_env, var):
+    response = state_test_env.uboot_console.run_command("echo $" + var)
+    assert response == ""
+
+def validate_set(state_test_env, var, value):
+    # echo does not preserve leading, internal, or trailing whitespace in the
+    # value. printenv does, and hence allows more complete testing.
+    response = state_test_env.uboot_console.run_command("printenv " + var)
+    assert response == (var + "=" + value)
+
+def test_env_echo_exists(state_test_env):
+    """Echo a variable that exists"""
+    var = state_test_env.get_existent_var()
+    value = state_test_env.env[var]
+    validate_set(state_test_env, var, value)
+
+def test_env_echo_non_existent(state_test_env):
+    """Echo a variable that doesn't exist"""
+    var = state_test_env.set_var
+    validate_empty(state_test_env, var)
+
+def test_env_printenv_non_existent(state_test_env):
+    """Check printenv error message"""
+    var = state_test_env.set_var
+    c = state_test_env.uboot_console
+    with c.disable_check("error_notification"):
+        response = c.run_command("printenv " + var)
+    assert(response == "## Error: \"" + var + "\" not defined")
+
+def test_env_unset_non_existent(state_test_env):
+    """Unset a nonexistent variable"""
+    var = state_test_env.get_non_existent_var()
+    unset_var(state_test_env, var)
+    validate_empty(state_test_env, var)
+
+def test_env_set_non_existent(state_test_env):
+    """Set a new variable"""
+    var = state_test_env.set_var
+    value = "foo"
+    set_var(state_test_env, var, value)
+    validate_set(state_test_env, var, value)
+
+def test_env_set_existing(state_test_env):
+    """Set an existing variable"""
+    var = state_test_env.set_var
+    value = "bar"
+    set_var(state_test_env, var, value)
+    validate_set(state_test_env, var, value)
+
+def test_env_unset_existing(state_test_env):
+    """Unset a variable"""
+    var = state_test_env.set_var
+    unset_var(state_test_env, var)
+    validate_empty(state_test_env, var)
+
+def test_env_expansion_spaces(state_test_env):
+    var_space = None
+    var_test = None
+    try:
+        var_space = state_test_env.get_non_existent_var()
+        set_var(state_test_env, var_space, " ")
+
+        var_test = state_test_env.get_non_existent_var()
+        value = " 1${%(var_space)s}${%(var_space)s} 2 " % locals()
+        set_var(state_test_env, var_test, value)
+        value = " 1   2 "
+        validate_set(state_test_env, var_test, value)
+    finally:
+        if var_space:
+            unset_var(state_test_env, var_space)
+        if var_test:
+            unset_var(state_test_env, var_test)
-- 
2.6.3