Add first unit test

This should kick off the infrastructure for unit tests. This can still
be improved but getting started is important to make it easier to add
unit tests and thus improving the quality.

3 files changed, 32 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 18bde1e..f692264 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,16 @@
 .PHONY: all clean
 
-all: build
+all: build/limox build/tests/get_domainpart
+	./build/tests/get_domainpart
+
+build/limox: build
 	gcc main.c gui.c xmpp.c -o build/limox -lSDL2
 
+build/tests/get_domainpart: build
+	gcc tests/get_domainpart.c xmpp.c -o build/tests/get_domainpart -I.
+
 build:
-	mkdir -p build
+	mkdir -p build/tests
 
 clean:
 	rm -rf build
diff --git a/tests/get_domainpart.c b/tests/get_domainpart.c
new file mode 100644
index 0000000..e05aee1
--- /dev/null
+++ b/tests/get_domainpart.c
@@ -0,0 +1,23 @@
+
+
+#include <string.h>
+#include <stdio.h>
+
+#include "xmpp.h"
+
+
+int main(void)
+{
+	char *input = "test@example.org/3f";
+	const char *expected = "example.org";
+
+	char *result = get_domainpart(input);
+
+	if (strcmp(result, expected) == 0) {
+		printf("Unit test passed - ok\n");
+		return 0;
+	} else {
+		printf("'%s' != '%s'!\n", result, expected);
+		return 1;
+	}
+}
diff --git a/xmpp.h b/xmpp.h
index b07e3b9..03b3dbd 100644
--- a/xmpp.h
+++ b/xmpp.h
@@ -1 +1,2 @@
 void xmpp_connect(void);
+char *get_domainpart(char *jid);