support/testing: test_squid: new runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2049,6 +2049,7 @@ F:	support/testing/tests/package/test_sed.py
 F:	support/testing/tests/package/test_socat.py
 F:	support/testing/tests/package/test_sox.py
 F:	support/testing/tests/package/test_sqlite.py
+F:	support/testing/tests/package/test_squid.py
 F:	support/testing/tests/package/test_strace.py
 F:	support/testing/tests/package/test_stress_ng.py
 F:	support/testing/tests/package/test_swipl.py

support/testing/tests/package/test_squid.py

@@ -0,0 +1,66 @@
+import os
+import time
+
+import infra.basetest
+
+
+class TestSquid(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
+        BR2_PACKAGE_LIGHTTPD=y
+        BR2_PACKAGE_SQUID=y
+        BR2_PACKAGE_WGET=y
+        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()
+
+        msg = "Hello Buildroot!"
+        fname = "file.txt"
+
+        # We check the program can run.
+        self.assertRunOk("squid --version")
+
+        # We create a file to serve over http.
+        self.assertRunOk(f"echo '{msg}' > /var/www/{fname}")
+
+        # We download the test file through the proxy.
+        proxy = "http://127.0.0.1:3128"
+        url = f"http://localhost/{fname}"
+        cmd = f"wget --progress=dot -e http_proxy={proxy} {url}"
+        # The squid server can take some time to start. Depending the
+        # load of the test controller, this can take a variable amount
+        # of time. We attempt several time before failing.
+        for attempt in range(15):
+            time.sleep(5)
+
+            _, ret = self.emulator.run(cmd)
+            if ret == 0:
+                break
+            # wget exit with status code 4 in case of a network error.
+            # Since we are waiting for the proxy server to be ready,
+            # we only expect this kind of error. We fail for other
+            # types of error.
+            self.assertEqual(ret, 4)
+        else:
+            self.fail("Timeout while waiting for squid to be ready.")
+
+        # We check the downloaded file has the expected content.
+        cmd = f"cat {fname}"
+        out, ret = self.emulator.run(cmd)
+        self.assertEqual(ret, 0)
+        self.assertEqual(out[0], msg)
+
+        # We also check the squid proxy logged the access.
+        cmd = "cat /var/log/squid/access.log"
+        out, ret = self.emulator.run(cmd)
+        self.assertEqual(ret, 0)
+        log_str = f"GET {url}"
+        self.assertIn(log_str, "\n".join(out))