tests: Add compile tests

Only tested by the meson build system.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Simon Ser <contact@emersion.fr>

tests/build-cxx.cc.in

@@ -0,0 +1,12 @@
+#include "@PROTOCOL_CLIENT_INCLUDE_FILE@"
+#include "@PROTOCOL_SERVER_INCLUDE_FILE@"
+
+/* This is a build-test only */
+
+using namespace std;
+
+int
+main(int argc, char **argv)
+{
+	return 0;
+}

tests/build-pedantic.c.in

@@ -0,0 +1,10 @@
+#include "@PROTOCOL_CLIENT_INCLUDE_FILE@"
+#include "@PROTOCOL_SERVER_INCLUDE_FILE@"
+
+/* This is a build-test only */
+
+int
+main(int argc, char **argv)
+{
+	return 0;
+}

tests/meson.build

@@ -1,6 +1,11 @@
 prog_scan_sh = find_program('scan.sh')
 prog_scanner = find_program(dep_scanner.get_pkgconfig_variable('wayland_scanner'))
 
+libwayland = [
+	dependency('wayland-client'),
+	dependency('wayland-server'),
+]
+
 # Check that each protocol passes through the scanner
 foreach protocol_file : protocol_files
 	protocol_path = join_paths(wayland_protocols_srcdir, protocol_file)
@@ -12,3 +17,125 @@ foreach protocol_file : protocol_files
 	     ]
 	)
 endforeach
+
+# Check buildability
+
+add_languages('c', 'cpp')
+replace = find_program('replace.py')
+
+foreach protocol_file : protocol_files
+	xml_file = fs.name(protocol_file)
+	xml_components = xml_file.split('.')
+	protocol_base_file_name = xml_components[0]
+
+	protocol_path = files(join_paths(wayland_protocols_srcdir, protocol_file))
+	client_header_path = '@0@-client.h'.format(protocol_base_file_name)
+	server_header_path = '@0@-server.h'.format(protocol_base_file_name)
+	code_path = '@0@-code.c'.format(protocol_base_file_name)
+	client_header = custom_target(
+		client_header_path,
+		output: client_header_path,
+		input: protocol_path,
+		command: [
+			prog_scanner,
+			'--strict',
+			'client-header',
+			'@INPUT@',
+			'@OUTPUT@',
+		],
+		install: false,
+	)
+	server_header = custom_target(
+		server_header_path,
+		output: server_header_path,
+		input: protocol_path,
+		command: [
+			prog_scanner,
+			'--strict',
+			'server-header',
+			'@INPUT@',
+			'@OUTPUT@',
+		],
+		install: false,
+	)
+	code = custom_target(
+		code_path,
+		output: code_path,
+		input: protocol_path,
+		command: [
+			prog_scanner,
+			'--strict',
+			'private-code',
+			'@INPUT@',
+			'@OUTPUT@',
+		],
+		install: false,
+	)
+
+	replace_command = [
+		replace,
+		'@INPUT@',
+		'@OUTPUT@',
+		'PROTOCOL_CLIENT_INCLUDE_FILE',
+		client_header.full_path(),
+		'PROTOCOL_SERVER_INCLUDE_FILE',
+		server_header.full_path(),
+	]
+
+	# Check that header can be included by a pedantic C99 compiler
+	test_name = 'test-build-pedantic-@0@'.format(protocol_file.underscorify())
+	test_name_source = '@0@.c'.format(test_name)
+	test_source = custom_target(
+		test_name_source,
+		input: 'build-pedantic.c.in',
+		output: test_name_source,
+		command: replace_command,
+	)
+	pedantic_test_executable = executable(
+		test_name,
+		[
+			test_source,
+			client_header,
+			server_header,
+			code
+		],
+		link_args: [
+			'-Wl,--unresolved-symbols=ignore-all',
+		],
+		dependencies: libwayland,
+		c_args: [
+			'-std=c99',
+			'-pedantic',
+			'-Wall',
+			'-Werror' ],
+		install: false,
+	)
+	test(test_name, pedantic_test_executable)
+
+	# Check that the header
+	if not protocol_file.contains('xdg-foreign-unstable-v1')
+		test_name = 'test-build-cxx-@0@'.format(protocol_file.underscorify())
+		test_name_source = '@0@.cc'.format(test_name)
+		test_source = custom_target(
+			test_name_source,
+			input: 'build-cxx.cc.in',
+			output: test_name_source,
+			command: replace_command,
+		)
+		cxx_test_executable = executable(
+			test_name,
+			[
+				test_source,
+				client_header,
+				server_header,
+			],
+			link_args: [ '-Wl,--unresolved-symbols=ignore-all' ],
+			cpp_args: [
+				'-Wall',
+				'-Werror',
+			],
+			install: false,
+		)
+		test(test_name, cxx_test_executable)
+	endif
+endforeach

tests/replace.py

@@ -0,0 +1,23 @@
+#!/usr/bin/python3
+
+import sys
+
+execpath, inpath, outpath, *dict_list = sys.argv
+
+dictonary = {}
+while dict_list:
+    key, value, *rest = dict_list
+    dictonary[key] = value
+    dict_list = rest
+
+infile = open(inpath, 'r')
+outfile = open(outpath, 'w')
+
+buf = infile.read()
+infile.close()
+
+for key, value in dictonary.items():
+    buf = buf.replace('@{}@'.format(key), value)
+
+outfile.write(buf)
+outfile.close()