pytest: Collect SPL unit tests

Add a new test_spl fixture to handle running SPL unit tests.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/py/conftest.py

@@ -227,7 +227,7 @@ def pytest_configure(config):
         console = u_boot_console_exec_attach.ConsoleExecAttach(log, ubconfig)
 
 re_ut_test_list = re.compile(r'_u_boot_list_2_(.*)_test_2_\1_test_(.*)\s*$')
-def generate_ut_subtest(metafunc, fixture_name):
+def generate_ut_subtest(metafunc, fixture_name, sym_path):
     """Provide parametrization for a ut_subtest fixture.
 
     Determines the set of unit tests built into a U-Boot binary by parsing the
@@ -237,12 +237,13 @@ def generate_ut_subtest(metafunc, fixture_name):
     Args:
         metafunc: The pytest test function.
         fixture_name: The fixture name to test.
+        sym_path: Relative path to the symbol file with preceding '/'
+            (e.g. '/u-boot.sym')
 
     Returns:
         Nothing.
     """
-
-    fn = console.config.build_dir + '/u-boot.sym'
+    fn = console.config.build_dir + sym_path
     try:
         with open(fn, 'rt') as f:
             lines = f.readlines()
@@ -317,10 +318,12 @@ def pytest_generate_tests(metafunc):
     Returns:
         Nothing.
     """
-
     for fn in metafunc.fixturenames:
         if fn == 'ut_subtest':
-            generate_ut_subtest(metafunc, fn)
+            generate_ut_subtest(metafunc, fn, '/u-boot.sym')
+            continue
+        if fn == 'ut_spl_subtest':
+            generate_ut_subtest(metafunc, fn, '/spl/u-boot-spl.sym')
             continue
         generate_config(metafunc, fn)
 

test/py/tests/test_spl.py

@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright 2020 Google LLC
+# Written by Simon Glass <sjg@chromium.org>
+
+import os.path
+import pytest
+
+def test_spl(u_boot_console, ut_spl_subtest):
+    """Execute a "ut" subtest.
+
+    The subtests are collected in function generate_ut_subtest() from linker
+    generated lists by applying a regular expression to the lines of file
+    spl/u-boot-spl.sym. The list entries are created using the C macro
+    UNIT_TEST().
+
+    Strict naming conventions have to be followed to match the regular
+    expression. Use UNIT_TEST(foo_test_bar, _flags, foo_test) for a test bar in
+    test suite foo that can be executed via command 'ut foo bar' and is
+    implemented in C function foo_test_bar().
+
+    Args:
+        u_boot_console (ConsoleBase): U-Boot console
+        ut_subtest (str): SPL test to be executed (e.g. 'dm platdata_phandle')
+    """
+    try:
+        cons = u_boot_console
+        cons.restart_uboot_with_flags(['-u', ut_spl_subtest])
+        output = cons.get_spawn_output().replace('\r', '')
+        assert 'Failures: 0' in output
+    finally:
+        # Restart afterward in case a non-SPL test is run next. This should not
+        # happen since SPL tests are run in their own invocation of test.py, but
+        # the cost of doing this is not too great at present.
+        u_boot_console.restart_uboot()