python3: Add ptest supportpbarker/python3-ptest

A run-ptest script written in python is added which defines a new TestRunner
subclass which prints test results in the required ptest format and then
executes python's built-in testsuite using this new TestRunner subclass.

The built-in testsuite is included in the python standard library and we ensure
we have the complete library by adding ${PN}-modules and ${PN}-misc to the
RDEPENDS for the ptest package. We also require libgcc for pthread support.

Tested on qemux86. Several tests fail and many skip; further investigation
should be done to check that the current status is acceptable. In addition, the
testsuite causes an out-of-memory crash when qemu is configured with 256 MB of
RAM. The testsuite completes without crashing with 1 GB RAM.

Signed-off-by: Paul Barker <paul@paulbarker.me.uk>

1 files changed, 56 insertions, 0 deletions

diff --git a/meta/recipes-devtools/python/python3/run-ptest b/meta/recipes-devtools/python/python3/run-ptest
new file mode 100644
index 0000000000..bd3ea1107c
--- /dev/null
+++ b/meta/recipes-devtools/python/python3/run-ptest
@@ -0,0 +1,56 @@
+#! /usr/bin/env python3
+
+from test import support
+from test import regrtest
+import unittest
+import sys
+
+# Define a test result class which outputs results in the desired format.
+class ptestResult(unittest.TestResult):
+    def __init__(self, runner):
+        super(ptestResult, self).__init__()
+        self.runner = runner
+
+    def addError(self, test, err):
+        super(ptestResult, self).addError(test, err)
+        self.runner.write("ERROR: %s: %s\n" % (str(test), str(err[1])))
+
+    def addSuccess(self, test):
+        super(ptestResult, self).addSuccess(test)
+        self.runner.write("PASS: %s\n" % str(test))
+
+    def addFailure(self, test, err):
+        super(ptestResult, self).addFailure(test, err)
+        self.runner.write("FAIL: %s: %s\n" % (str(test), str(err[1])))
+
+    def addSkip(self, test, reason):
+        super(ptestResult, self).addSkip(test, reason)
+        self.runner.write("SKIP: %s: %s\n" % (str(test), str(reason)))
+
+    def addExpectedFailure(self, test, err):
+        super(ptestResult, self).addExpectedFailure(test, err)
+        self.runner.write("XFAIL: %s\n" % (str(test)))
+
+    def addUnexpectedSuccess(self, test):
+        super(ptestResult, self).addUnexpectedSuccess(test)
+        self.runner.write("XPASS: %s\n" % str(test))
+
+# Define a test runner which uses the above output class.
+class ptestRunner:
+    def __init__(self, stream=sys.stderr):
+        self.stream = stream
+
+    def write(self, message):
+        self.stream.write(message)
+
+    def run(self, test):
+        result = ptestResult(self)
+        test(result)
+        return result
+
+# Replace the test runner in python's standard library 'test.support'.
+support.BasicTestRunner = ptestRunner
+
+# Run the python regression test suite - the replacement test runner will be
+# used.
+regrtest.main()