test: use unittest and test_runner for test framework unit testing

Test the test_framework, but don't use test_framework objects or functions to test itself

Use python unittest library and put test_framework's unit tests inside their respective files
Add the filename to TEST_FRAMEWORK_MODULES in test_runner
Aggregate all test_framework tests into one TestSuite to run before the functional tests in test_runner
Delete framework_test_script, move test_bn2vch to script.py and add to TEST_FRAMEWORK_MODULES in test_runner

Author: glozow

test/functional/framework_test_script.py

@@ -8,6 +8,7 @@
 """
 import hashlib
 import struct
+import unittest
 
 from .messages import (
     CTransaction,
@@ -715,3 +716,25 @@ def SegwitV0SignatureHash(script, txTo, inIdx, hashtype, amount):
     ss += struct.pack("<I", hashtype)
 
     return hash256(ss)
+
+class TestFrameworkScript(unittest.TestCase):
+    def test_bn2vch(self):
+        self.assertEqual(bn2vch(0), bytes([]))
+        self.assertEqual(bn2vch(1), bytes([0x01]))
+        self.assertEqual(bn2vch(-1), bytes([0x81]))
+        self.assertEqual(bn2vch(0x7F), bytes([0x7F]))
+        self.assertEqual(bn2vch(-0x7F), bytes([0xFF]))
+        self.assertEqual(bn2vch(0x80), bytes([0x80, 0x00]))
+        self.assertEqual(bn2vch(-0x80), bytes([0x80, 0x80]))
+        self.assertEqual(bn2vch(0xFF), bytes([0xFF, 0x00]))
+        self.assertEqual(bn2vch(-0xFF), bytes([0xFF, 0x80]))
+        self.assertEqual(bn2vch(0x100), bytes([0x00, 0x01]))
+        self.assertEqual(bn2vch(-0x100), bytes([0x00, 0x81]))
+        self.assertEqual(bn2vch(0x7FFF), bytes([0xFF, 0x7F]))
+        self.assertEqual(bn2vch(-0x8000), bytes([0x00, 0x80, 0x80]))
+        self.assertEqual(bn2vch(-0x7FFFFF), bytes([0xFF, 0xFF, 0xFF]))
+        self.assertEqual(bn2vch(0x80000000), bytes([0x00, 0x00, 0x00, 0x80, 0x00]))
+        self.assertEqual(bn2vch(-0x80000000), bytes([0x00, 0x00, 0x00, 0x80, 0x80]))
+        self.assertEqual(bn2vch(0xFFFFFFFF), bytes([0xFF, 0xFF, 0xFF, 0xFF, 0x00]))
+        self.assertEqual(bn2vch(123456789), bytes([0x15, 0xCD, 0x5B, 0x07]))
+        self.assertEqual(bn2vch(-54321), bytes([0x31, 0xD4, 0x80]))

test/functional/test_framework/script.py

@@ -24,6 +24,7 @@
 import tempfile
 import re
 import logging
+import unittest
 
 # Formatting. Default colors to empty strings.
 BOLD, GREEN, RED, GREY = ("", ""), ("", ""), ("", ""), ("", "")
@@ -65,6 +66,10 @@
 TEST_EXIT_PASSED = 0
 TEST_EXIT_SKIPPED = 77
 
+TEST_FRAMEWORK_MODULES = [
+    "script",
+]
+
 EXTENDED_SCRIPTS = [
     # These tests are not run by default.
     # Longest test should go first, to favor running tests in parallel
@@ -221,7 +226,6 @@
     'rpc_help.py',
     'feature_help.py',
     'feature_shutdown.py',
-    'framework_test_script.py',
     # Don't append tests at the end to avoid merge conflicts
     # Put them in a random line within the section that fits their approximate run-time
 ]
@@ -384,6 +388,16 @@ def run_tests(*, test_list, src_dir, build_dir, tmpdir, jobs=1, enable_coverage=
     if os.path.isdir(cache_dir):
         print("%sWARNING!%s There is a cache directory here: %s. If tests fail unexpectedly, try deleting the cache directory." % (BOLD[1], BOLD[0], cache_dir))
 
+    # Test Framework Tests
+    print("Running Unit Tests for Test Framework Modules")
+    test_framework_tests = unittest.TestSuite()
+    for module in TEST_FRAMEWORK_MODULES:
+        test_framework_tests.addTest(unittest.TestLoader().loadTestsFromName("test_framework.{}".format(module)))
+    result = unittest.TextTestRunner(verbosity=1, failfast=True).run(test_framework_tests)
+    if not result.wasSuccessful():
+        logging.debug("Early exiting after failure in TestFramework unit tests")
+        sys.exit(False)
+
     tests_dir = src_dir + '/test/functional/'
 
     flags = ['--cachedir={}'.format(cache_dir)] + args
@@ -607,7 +621,7 @@ def was_successful(self):
 def check_script_prefixes():
     """Check that test scripts start with one of the allowed name prefixes."""
 
-    good_prefixes_re = re.compile("^(example|feature|interface|mempool|mining|p2p|rpc|wallet|tool|framework_test)_")
+    good_prefixes_re = re.compile("^(example|feature|interface|mempool|mining|p2p|rpc|wallet|tool)_")
     bad_script_names = [script for script in ALL_SCRIPTS if good_prefixes_re.match(script) is None]
 
     if bad_script_names: