[Buildroot] [git commit branch/2025.02.x] support/testing: guile: new runtime test

commit: https://gitlab.com/buildroot.org/buildroot/-/commit/e6e34723304093d51817defd78635408707e802d
branch: https://gitlab.com/buildroot.org/buildroot/-/tree/2025.02.x

Signed-off-by: Julien Olivain <[email protected]>
(cherry picked from commit 29c988c7fc4f4916f023e08e939e1326056ebf2f)
Signed-off-by: Titouan Christophe <[email protected]>
---
 DEVELOPERS                                         |  2 +
 support/testing/tests/package/test_guile.py        | 76 ++++++++++++++++++++++
 .../test_guile/rootfs-overlay/root/fact.scm        | 13 ++++
 3 files changed, 91 insertions(+)

diff --git a/DEVELOPERS b/DEVELOPERS
index a0111b631f..fbe573ebed 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1852,6 +1852,8 @@ F:	support/testing/tests/package/test_gnuradio/
 F:	support/testing/tests/package/test_gpsd.py
 F:	support/testing/tests/package/test_gpsd/
 F:	support/testing/tests/package/test_gstreamer1.py
+F:	support/testing/tests/package/test_guile.py
+F:	support/testing/tests/package/test_guile/
 F:	support/testing/tests/package/test_gzip.py
 F:	support/testing/tests/package/test_highway.py
 F:	support/testing/tests/package/test_hwloc.py
diff --git a/support/testing/tests/package/test_guile.py b/support/testing/tests/package/test_guile.py
new file mode 100644
index 0000000000..0af4a3f65c
--- /dev/null
+++ b/support/testing/tests/package/test_guile.py
@@ -0,0 +1,76 @@
+import os
+from math import factorial
+
+import infra.basetest
+
+
+class TestGuile(infra.basetest.BRTest):
+    rootfs_overlay = \
+        infra.filepath("tests/package/test_guile/rootfs-overlay")
+    config = \
+        f"""
+        BR2_aarch64=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_GENERATE_LOCALE="en_US.UTF-8"
+        BR2_LINUX_KERNEL=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.18.40"
+        BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+        BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
+        BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+        BR2_SYSTEM_ENABLE_NLS=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        BR2_TARGET_ROOTFS_CPIO_GZIP=y
+        BR2_ROOTFS_OVERLAY="{rootfs_overlay}"
+        # BR2_TARGET_ROOTFS_TAR is not set
+        BR2_PACKAGE_GUILE=y
+        """
+
+    def guile_cmd(self, guile_expr):
+        return f"guile -q -c '{guile_expr}'"
+
+    def test_run(self):
+        img = os.path.join(self.builddir, "images", "rootfs.cpio.gz")
+        kern = os.path.join(self.builddir, "images", "Image")
+        self.emulator.boot(arch="aarch64",
+                           kernel=kern,
+                           options=["-M", "virt", "-cpu", "cortex-a57", "-m", "512M", "-initrd", img])
+        self.emulator.login()
+
+        # Guile needs a locale configured to work properly.
+        self.assertRunOk("export LANG=en_US.UTF-8")
+
+        # Check the program works.
+        self.assertRunOk("guile --version")
+
+        # Check a string output.
+        string = "Hello Buildroot!"
+        cmd = self.guile_cmd(f'(display "{string}")(newline)')
+        output, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, 0)
+        self.assertEqual(output[0], string)
+
+        # Check the exit status works.
+        code = 123
+        cmd = self.guile_cmd(f"(exit {code})")
+        _, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, code)
+
+        # Check basic artihmetic works.
+        val1 = 123
+        val2 = 456
+        guile_expr = f'(display (* {val1} {val2}))(newline)'
+        cmd = self.guile_cmd(guile_expr)
+        output, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, 0)
+        expected_result = val1 * val2
+        self.assertEqual(int(output[0]), expected_result)
+
+        # Check we can call a Guile script. We disable auto
+        # compilation to suppress compilation and cache messages.
+        val = 12
+        cmd = f"GUILE_AUTO_COMPILE=0 /root/fact.scm {val}"
+        output, exit_code = self.emulator.run(cmd)
+        self.assertEqual(exit_code, 0)
+        expected_result = factorial(val)
+        self.assertEqual(int(output[0]), expected_result)
diff --git a/support/testing/tests/package/test_guile/rootfs-overlay/root/fact.scm b/support/testing/tests/package/test_guile/rootfs-overlay/root/fact.scm
new file mode 100755
index 0000000000..a937ff4041
--- /dev/null
+++ b/support/testing/tests/package/test_guile/rootfs-overlay/root/fact.scm
@@ -0,0 +1,13 @@
+#! /usr/bin/env guile
+!#
+
+; Adapted from "The Guile Reference Manual"
+; Section 4.3.4 Scripting Examples
+; https://doc.guix.gnu.org/guile/latest/en/html_node/Scripting-Examples.html
+
+(define (fact n)
+  (if (zero? n) 1
+    (* n (fact (- n 1)))))
+
+(display (fact (string->number (cadr (command-line)))))
+(newline)
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