Add support for unit testing.

tools/bin/td

@@ -117,7 +117,27 @@ recipe_format() {
 
 # Execute all the unit tests and report any failures.
 recipe_test() {
-	echo "Unit tests are not implemented yet."
+	passed=0
+	failed=0
+	mkdir -p "build/tests"
+	for testSrc in $(find tests -name 'Test*.c'); do
+		testBin=$(basename "$testSrc" .c)
+		testBin="build/tests/$testBin"
+
+		if ! $CC $CFLAGS -I src -o "$testBin" "$testSrc"; then
+			failed=$((failed + 1))
+			break;
+		fi
+
+		if ! "$testBin"; then
+			failed=$((failed + 1))
+			break;
+		fi
+
+		passed=$((passed + 1))
+	done
+	echo "Passed: $passed, failed: $failed"
+	echo "Total: $((passed + failed))"
 }
 
 # Deploy the Telodendria website by copying the required files to