support/testing: add a "file" package runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -1769,6 +1769,8 @@ F:	support/testing/tests/package/test_cryptsetup/
 F:	support/testing/tests/package/test_ddrescue.py
 F:	support/testing/tests/package/test_ddrescue/
 F:	support/testing/tests/package/test_dos2unix.py
+F:	support/testing/tests/package/test_file.py
+F:	support/testing/tests/package/test_file/
 F:	support/testing/tests/package/test_fluidsynth.py
 F:	support/testing/tests/package/test_fluidsynth/
 F:	support/testing/tests/package/test_fping.py

support/testing/tests/package/test_file.py

@@ -0,0 +1,48 @@
+import os
+
+import infra.basetest
+
+
+class TestFile(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        f"""
+        BR2_PACKAGE_FILE=y
+        BR2_ROOTFS_OVERLAY="{infra.filepath("tests/package/test_file/rootfs-overlay")}"
+        BR2_TARGET_ROOTFS_CPIO=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
+        self.emulator.boot(arch="armv5",
+                           kernel="builtin",
+                           options=["-initrd", cpio_file])
+        self.emulator.login()
+
+        self.assertRunOk("file --version")
+
+        tests = [
+            ("", "plain-text.txt", "ASCII text"),
+            ("-i", "plain-text.txt", "text/plain"),
+            ("", "plain-text.txt.gz", "gzip compressed data"),
+            ("-i", "plain-text.txt.gz", "application/gzip"),
+            ("-z", "plain-text.txt.gz", "ASCII text"),
+            ("", "random-data.bin", "data"),
+            ("-i", "random-data.bin", "application/octet-stream"),
+            ("", "code.c", "C source"),
+            ("-i", "code.c", "text/x-c"),
+            ("", "script.sh", "POSIX shell script"),
+            ("-i", "script.sh", "text/x-shellscript"),
+            ("", "script.py", "Python script"),
+            ("", "/usr/share/misc/magic.mgc", "magic binary file for file"),
+            ("", "/usr/bin/file", "ELF"),
+            ("", "/dev/zero", "character special"),
+            ("", "/", "directory"),
+            ("-h", "symlink-to-plain-text.txt", "symbolic link"),
+            ("-L", "symlink-to-plain-text.txt", "ASCII text")
+        ]
+        for opt_str, path, pattern in tests:
+            cmd = f"file {opt_str} '{path}'"
+            out, ret = self.emulator.run(cmd)
+            self.assertEqual(ret, 0, f"Failed to run '{cmd}'")
+            self.assertIn(pattern, "\n".join(out))

support/testing/tests/package/test_file/rootfs-overlay/root/code.c

@@ -0,0 +1,9 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int
+main(void)
+{
+    printf("Hello Buildroot!\n");
+    exit(EXIT_SUCCESS);
+}

support/testing/tests/package/test_file/rootfs-overlay/root/plain-text.txt

@@ -0,0 +1 @@
+This is a plain text file...

support/testing/tests/package/test_file/rootfs-overlay/root/script.py

@@ -0,0 +1,3 @@
+#! /usr/bin/env python3
+
+print("Hello Buildroot!")

support/testing/tests/package/test_file/rootfs-overlay/root/script.sh

@@ -0,0 +1,3 @@
+#! /bin/sh
+
+echo "Hello Buildroot!"

support/testing/tests/package/test_file/rootfs-overlay/root/symlink-to-plain-text.txt

@@ -0,0 +1 @@
+plain-text.txt