[PATCH v5 7/9] tests/functional: Add decorator to skip test on missing env vars

[Gustavo Romero <gustavo.romero@linaro.org>]

Add a decorator to skip tests on missing env variable(s). Multiple
variable names can be provided and if one or more of them are not set in
the test environment the test is skipped and the missing vars are
printed out.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org>
---
 tests/functional/qemu_test/__init__.py   |  3 ++-
 tests/functional/qemu_test/decorators.py | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/tests/functional/qemu_test/__init__.py b/tests/functional/qemu_test/__init__.py
index 60d19891bf..320193591b 100644
--- a/tests/functional/qemu_test/__init__.py
+++ b/tests/functional/qemu_test/__init__.py
@@ -15,7 +15,8 @@
 from .linuxkernel import LinuxKernelTest
 from .decorators import skipIfMissingCommands, skipIfNotMachine, \
     skipFlakyTest, skipUntrustedTest, skipBigDataTest, skipSlowTest, \
-    skipIfMissingImports, skipIfOperatingSystem, skipLockedMemoryTest
+    skipIfMissingImports, skipIfOperatingSystem, skipLockedMemoryTest, \
+    skipIfMissingEnv
 from .archive import archive_extract
 from .uncompress import uncompress
 from .gdb import GDB
diff --git a/tests/functional/qemu_test/decorators.py b/tests/functional/qemu_test/decorators.py
index c0d1567b14..b239295804 100644
--- a/tests/functional/qemu_test/decorators.py
+++ b/tests/functional/qemu_test/decorators.py
@@ -11,6 +11,24 @@
 from .cmd import which
 
 '''
+Decorator to skip execution of a test if the provided
+environment variables are not set.
+Example:
+
+  @skipIfMissingEnv("QEMU_ENV_VAR0", "QEMU_ENV_VAR1")
+'''
+def skipIfMissingEnv(*vars_):
+    missing_vars = []
+    for var in vars_:
+        if os.getenv(var) == None:
+            missing_vars.append(var)
+
+    has_vars = True if len(missing_vars) == 0 else False
+
+    return skipUnless(has_vars, f"Missing env var(s): {', '.join(missing_vars)}")
+
+'''
+
 Decorator to skip execution of a test if the list
 of command binaries is not available in $PATH.
 Example:
-- 
2.34.1