chore: setup primitive testing framework

4 files changed, 57 insertions, 3 deletions

diff --git a/src/board.h b/src/board.h
index 6cde670..052e104 100644
--- a/src/board.h
+++ b/src/board.h
@@ -19,7 +19,7 @@ typedef struct {
   BYTE en_passant_square;
 } Board;
 
-const char* pieces[] = {
+static const char* pieces[] = {
   "♟︎", "♙",
   "♞", "♘",
   "♝", "♗",
diff --git a/src/main.c b/src/main.c
index e9902b2..a442231 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,7 +1,10 @@
-#include <stdio.h>
+#include "unittest.h"
 #include "board.h"
 
 int main() {
-  printf("Size of board: %lu bytes\n", sizeof(Board));
+  unit_test(2 * 2 == 4, "2 * 2 == 4");
+  unit_test(2 * 2 == 5, "2 * 2 == 4");
+
+  report();
   return 0;
 }
diff --git a/src/unittest.c b/src/unittest.c
new file mode 100644
index 0000000..753dac3
--- /dev/null
+++ b/src/unittest.c
@@ -0,0 +1,33 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include "unittest.h"
+
+static int TOTAL = 0;
+static int SUCCESS = 0;
+
+
+bool assert(bool expression, const char* message) {
+    if (!expression) {
+        printf("%s\n", draw(RED, DEFAULT_ASSERT_MESSAGE));
+        printf("%s\n", message);
+    }
+    return expression;
+}
+
+void unit_test(bool expression, const char* subject) {
+    TOTAL++;
+    printf( "%d. %s: %s\n", TOTAL, subject, expression? draw(GRN, PASS) : draw(RED, FAIL));
+    if (expression) SUCCESS++;
+}
+
+double coverage() {
+    return 100 * (TOTAL? (double)SUCCESS/TOTAL : 1);
+}
+
+bool report() {
+    printf("%s ", SUCCESS == TOTAL ? draw(GRN, "All checks successful!") : draw(RED, "Some tests have failed"));
+    printf("[%d / %d]\n", SUCCESS, TOTAL);
+    printf("Total coverage: %.2f%%\n", coverage());
+    return TOTAL - SUCCESS;
+}
+
diff --git a/src/unittest.h b/src/unittest.h
new file mode 100644
index 0000000..d2fd4ad
--- /dev/null
+++ b/src/unittest.h
@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+#define RED   "\x1B[31m"
+#define GRN   "\x1B[32m"
+#define RESET "\x1B[0m"
+
+#define PASS "PASS!"
+#define FAIL "FAIL!"
+#define DEFAULT_ASSERT_MESSAGE "Assertion failed!"
+
+#define draw(COLOR, TEXT) COLOR TEXT RESET
+
+bool assert(bool expression, const char* message);
+
+void unit_test(bool expression, const char* subject);
+
+bool report();