[Buildroot] [PATCH 2/2] support/testing: add rwmem tests

[Vincent Cruz <mooz@blockos.org>]

Add a basic runtime test for rwmem package.
This test verifies that `rwmem` package can read register values from
an I2C device and a memory mapped file.

Signed-off-by: Vincent Cruz <mooz@blockos.org>
---
 support/testing/tests/package/test_rwmem.py   | 72 +++++++++++++++++++
 .../package/test_rwmem/linux-rwmem.fragment   |  3 +
 .../test_rwmem/rootfs-overlay/root/tests.py   | 22 ++++++
 3 files changed, 97 insertions(+)
 create mode 100644 support/testing/tests/package/test_rwmem.py
 create mode 100644 support/testing/tests/package/test_rwmem/linux-rwmem.fragment
 create mode 100644 support/testing/tests/package/test_rwmem/rootfs-overlay/root/tests.py

diff --git a/support/testing/tests/package/test_rwmem.py b/support/testing/tests/package/test_rwmem.py
new file mode 100644
index 0000000000..15d9fbc8d0
--- /dev/null
+++ b/support/testing/tests/package/test_rwmem.py
@@ -0,0 +1,72 @@
+import os
+
+import infra.basetest
+
+
+class TestRwmem(infra.basetest.BRTest):
+    kernel_fragment = infra.filepath("tests/package/test_rwmem/linux-rwmem.fragment")
+    rootfs_overlay = infra.filepath("tests/package/test_rwmem/rootfs-overlay")
+
+    config = \
+        f"""
+        BR2_arm=y
+        BR2_cortex_a9=y
+        BR2_ARM_ENABLE_NEON=y
+        BR2_ARM_ENABLE_VFP=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV7_EABIHF_GLIBC_STABLE=y
+        BR2_LINUX_KERNEL=y
+        BR2_LINUX_KERNEL_DEFCONFIG="vexpress"
+        BR2_LINUX_KERNEL_DTS_SUPPORT=y
+        BR2_LINUX_KERNEL_INTREE_DTS_NAME="arm/vexpress-v2p-ca9"
+        BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+        BR2_TARGET_ROOTFS_CPIO=y
+        BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{kernel_fragment}"
+        BR2_ROOTFS_OVERLAY="{rootfs_overlay}"
+        BR2_PACKAGE_PYTHON3=y
+        BR2_PACKAGE_RWMEM=y
+        BR2_PACKAGE_RWMEM_PYTHON=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        img = os.path.join(self.builddir, "images", "rootfs.cpio")
+        kern = os.path.join(self.builddir, "images", "zImage")
+        dtb = os.path.join(self.builddir, "images", "vexpress-v2p-ca9.dtb")
+        self.emulator.boot(arch="armv7",
+                           kernel=kern,
+                           kernel_cmdline=["console=ttyAMA0"],
+                           options=["-M", "vexpress-a9",
+                                    "-dtb", dtb,
+                                    "-device", "virtio-rng-device",
+                                    "-device", "tmp105,address=0x49,id=sensor",
+                                    "-initrd", img])
+        self.emulator.login()
+
+        self.assertRunOk("i2cset -y 0 0x49 0x02 0x5a 0x80 i")
+
+        out, ret = self.emulator.run("rwmem -S 8 -s 16be --i2c=0:0x49 0x02")
+        self.assertEqual(ret, 0)
+        self.assertIn("0x02 (+0x0) = 0x5a80", out)
+
+        out, ret = self.emulator.run("rwmem -S 8 -s 8 --mmap /etc/os-release 0x6-0xe")
+        self.assertEqual(ret, 0)
+        self.assertEqual(out, [
+            "0x06 (+0x0) = 0x75",
+            "0x07 (+0x1) = 0x69",
+            "0x08 (+0x2) = 0x6c",
+            "0x09 (+0x3) = 0x64",
+            "0x0a (+0x4) = 0x72",
+            "0x0b (+0x5) = 0x6f",
+            "0x0c (+0x6) = 0x6f",
+            "0x0d (+0x7) = 0x74"
+        ])
+
+        self.assertRunOk("i2cset -y 0 0x49 0x02 0x7c 0xa0 i")
+        out, ret = self.emulator.run("python3 /root/tests.py")
+        self.assertEqual(ret, 0)
+        self.assertEqual(out, [
+            "0x7ca0",
+            "0x75696c64726f6f74"
+        ])
diff --git a/support/testing/tests/package/test_rwmem/linux-rwmem.fragment b/support/testing/tests/package/test_rwmem/linux-rwmem.fragment
new file mode 100644
index 0000000000..15d1e73bc8
--- /dev/null
+++ b/support/testing/tests/package/test_rwmem/linux-rwmem.fragment
@@ -0,0 +1,3 @@
+CONFIG_I2C=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_SENSORS_LM75=y
\ No newline at end of file
diff --git a/support/testing/tests/package/test_rwmem/rootfs-overlay/root/tests.py b/support/testing/tests/package/test_rwmem/rootfs-overlay/root/tests.py
new file mode 100644
index 0000000000..f3e094b913
--- /dev/null
+++ b/support/testing/tests/package/test_rwmem/rootfs-overlay/root/tests.py
@@ -0,0 +1,22 @@
+#! /usr/bin/env python3
+# This is the python version of the rwmem cli tests.
+import sys
+
+import rwmem as rw
+
+# rwmem -S 8 -s 16be --i2c=0:0x49 0x02
+map = rw.I2CTarget(i2c_adapter_nr=0, i2c_dev_addr=0x49,
+                   offset=0x0, length=16,
+                   addr_endianness=rw.Endianness.Big, addr_size=1,
+                   data_endianness=rw.Endianness.Big, data_size=2,
+                   mode=rw.MapMode.ReadWrite)
+
+out = map.read(0x02)
+print(hex(out))
+
+# rwmem -S 8 -s 8 --mmap /etc/os-release 0x6-0xe
+map = rw.MMapTarget('/etc/os-release', 0, 32, rw.Endianness.Big, 1, rw.MapMode.Read)
+out = map.read(0x6, 8)
+print(hex(out))
+
+sys.exit(0)
-- 
2.51.0

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