support/testing/tests: add test for check_bin_arch

This tests build a bogus package that installs a binary built for the
host architecture into $(TARGET_DIR), which should cause a build
failure, at least as long as the host architecture isn't ARM.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
[yann.morin.1998@free.fr: drop uneeded subprocess import to fix flake8]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

support/testing/tests/core/br2-external/detect-bad-arch/Config.in

@@ -0,0 +1 @@
+source "$BR2_EXTERNAL_DETECT_BAD_ARCH_PATH/package/detect-bad-arch/Config.in"

support/testing/tests/core/br2-external/detect-bad-arch/external.desc

@@ -0,0 +1 @@
+name: DETECT_BAD_ARCH

support/testing/tests/core/br2-external/detect-bad-arch/external.mk

@@ -0,0 +1 @@
+include $(sort $(wildcard $(BR2_EXTERNAL_DETECT_BAD_ARCH_PATH)/package/*/*.mk))

support/testing/tests/core/br2-external/detect-bad-arch/package/detect-bad-arch/Config.in

@@ -0,0 +1,4 @@
+config BR2_PACKAGE_DETECT_BAD_ARCH
+	bool
+	default y
+

support/testing/tests/core/br2-external/detect-bad-arch/package/detect-bad-arch/detect-bad-arch.mk

@@ -0,0 +1,15 @@
+################################################################################
+#
+# detect-bad-arch
+#
+################################################################################
+
+define DETECT_BAD_ARCH_BUILD_CMDS
+	echo "int main(void) { return 0; }" | $(HOSTCC) -x c -o $(@D)/foo -
+endef
+
+define DETECT_BAD_ARCH_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/foo $(TARGET_DIR)/usr/bin/foo
+endef
+
+$(eval $(generic-package))

support/testing/tests/core/test_bad_arch.py

@@ -0,0 +1,18 @@
+import infra
+import infra.basetest
+
+
+class DetectBadArchTest(infra.basetest.BRConfigTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + infra.basetest.MINIMAL_CONFIG
+    br2_external = [infra.filepath("tests/core/br2-external/detect-bad-arch")]
+
+    def test_run(self):
+        with self.assertRaises(SystemError):
+            self.b.build()
+        logf_path = infra.log_file_path(self.b.builddir, "build",
+                                        infra.basetest.BRConfigTest.logtofile)
+        if logf_path:
+            s = 'ERROR: architecture for "/usr/bin/foo" is'
+            with open(logf_path, "r") as f:
+                lines = [l for l in f.readlines() if l.startswith(s)]
+            self.assertEqual(len(lines), 1)