selftest/runtime-test.py: Add test for testexport SDK feature

This adds test_testexport_sdk() to test the SDK feature
of testexport in the CI in order to avoid breaking it.

[YOCTO #9765]

(From OE-Core rev: badec3d10fcdd2d000450ab533caadcff1df5e13)

Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/lib/oeqa/runtime/selftest.py

@@ -1,9 +1,13 @@
+import os
+
 from oeqa.oetest import oeRuntimeTest, skipModule
+from oeqa.utils.commands import runCmd
 from oeqa.utils.decorators import *
 
 class Selftest(oeRuntimeTest):
 
     @skipUnlessPassed("test_ssh")
+    @tag("selftest_package_install")
     def test_install_package(self):
         """
         Summary: Check basic package installation functionality.
@@ -18,6 +22,7 @@ class Selftest(oeRuntimeTest):
         self.assertEqual(status, 0, msg="socat is not installed")
 
     @skipUnlessPassed("test_install_package")
+    @tag("selftest_package_install")
     def test_verify_unistall(self):
         """
         Summary: Check basic package installation functionality.
@@ -29,3 +34,22 @@ class Selftest(oeRuntimeTest):
 
         (status, output) = self.target.run("socat -V")
         self.assertNotEqual(status, 0, msg="socat is still installed")
+
+    @tag("selftest_sdk")
+    def test_sdk(self):
+
+        result = runCmd("env -0")
+        sdk_path = search_sdk_path(result.output)
+        self.assertTrue(sdk_path, msg="Can't find SDK path")
+
+        tar_cmd = os.path.join(sdk_path, "tar")
+        result = runCmd("%s --help" % tar_cmd)
+
+def search_sdk_path(env):
+    for line in env.split("\0"):
+        (key, _, value) = line.partition("=")
+        if key == "PATH":
+            for path in value.split(":"):
+                if "pokysdk" in path:
+                    return path
+    return ""