test: spl: Add a test for the SPI load method

Add test for the SPI load method. This one is pretty straightforward. We
can't enable FIT_EXTERNAL with LOAD_FIT_FULL because spl_spi_load_image
doesn't know the total image size and has to guess from fdt_totalsize. This
doesn't include external data, so loading it will fail.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

test/py/tests/test_spl.py

@@ -5,6 +5,16 @@
 import os.path
 import pytest
 
+@pytest.mark.buildconfigspec('spl_unit_test')
+def test_ut_spl_init(u_boot_console):
+    """Initialize data for ut spl tests."""
+
+    fn = u_boot_console.config.source_dir + '/spi.bin'
+    if not os.path.exists(fn):
+        data = b'\x00' * (2 * 1024 * 1024)
+        with open(fn, 'wb') as fh:
+            fh.write(data)
+
 def test_spl(u_boot_console, ut_spl_subtest):
     """Execute a "ut" subtest.