support/testing/tests/package/test_nu.py: new runtime test

Load sample script support/testing/tests/package/sample_nu.nu onto the
target and verify proper execution by nushell

Signed-off-by: Sebastian Weyer <sebastian.weyer@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2685,6 +2685,8 @@ F:	package/ripgrep/
 
 N:	Sebastian Weyer <sebastian.weyer@smile.fr>
 F:	package/nushell/
+F:	support/testing/tests/package/sample_nu.nu
+F:	support/testing/tests/package/test_nu.py
 
 N:	Sébastien Szymanski <sebastien.szymanski@armadeus.com>
 F:	package/mmc-utils/

support/testing/tests/package/sample_nu.nu

@@ -0,0 +1,6 @@
+#! /usr/bin/nu
+def greet [name] {
+  ["hello" $name]
+}
+
+greet "world"

support/testing/tests/package/test_nu.py

@@ -0,0 +1,32 @@
+import os
+
+import infra.basetest
+
+
+class TestNu(infra.basetest.BRTest):
+    # infra.basetest.BASIC_TOOLCHAIN_CONFIG cannot be used as it doesn't
+    # support a host rustc which is necessary for nushell
+    config = \
+        """
+        BR2_arm=y
+        BR2_cortex_a9=y
+        BR2_ARM_ENABLE_NEON=y
+        BR2_ARM_ENABLE_VFP=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+        BR2_SYSTEM_DHCP="eth0"
+        BR2_PACKAGE_NUSHELL=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        BR2_ROOTFS_POST_BUILD_SCRIPT="{}"
+        BR2_ROOTFS_POST_SCRIPT_ARGS="{}"
+        """.format(infra.filepath("tests/package/copy-sample-script-to-target.sh"),
+                   infra.filepath("tests/package/sample_nu.nu"))
+
+    def test_run(self):
+        img = os.path.join(self.builddir, "images", "rootfs.cpio")
+        self.emulator.boot(arch="armv7",
+                           kernel="builtin",
+                           options=["-initrd", img])
+        self.emulator.login()
+        cmd = "nu sample_nu.nu"
+        self.assertRunOk(cmd)