From 2009a26e17ad9dbefee3a5ca4339d754e51ef078 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sun, 15 Feb 2026 00:04:23 +0900
Subject: refactor: write more tests in C

---
 tests/expressions.c | 107 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 tests/expressions.c

(limited to 'tests/expressions.c')

diff --git a/tests/expressions.c b/tests/expressions.c
new file mode 100644
index 0000000..4214519
--- /dev/null
+++ b/tests/expressions.c
@@ -0,0 +1,107 @@
+#include <helpers.h>
+
+char get_char() {
+    return 65;
+}
+
+int glob_x, glob_y, glob_z = 5;
+
+int main() {
+    ASSERT_EQ(0, !1);
+    ASSERT_EQ(1, !0);
+    ASSERT_EQ(0, !23);
+
+    int a = 42;
+    ++a;
+    a++;
+    ASSERT_EQ(44, a);
+    ASSERT_EQ(44, a++);
+    ASSERT_EQ(46, ++a);
+    ASSERT_EQ(46, a);
+    --a;
+    a--;
+    ASSERT_EQ(44, a--);
+    ASSERT_EQ(42, --a);
+    ASSERT_EQ(42, a);
+
+    int va, vb;
+    va = 1, vb = 2;
+    int vc = 3, vd = 4;
+    ASSERT_EQ(1, va);
+    ASSERT_EQ(2, vb);
+    ASSERT_EQ(3, vc);
+    ASSERT_EQ(4, vd);
+    ASSERT_EQ(0, glob_x);
+    ASSERT_EQ(0, glob_y);
+    ASSERT_EQ(5, glob_z);
+
+    char c = 65;
+    int i = (int)c;
+    ASSERT_EQ(65, i);
+
+    int i2 = 321;
+    char c2 = (char)i2;
+    ASSERT_EQ(65, c2);
+
+    short s = 127;
+    int i3 = (int)s;
+    ASSERT_EQ(127, i3);
+
+    int i4 = 65537;
+    short s2 = (short)i4;
+    ASSERT_EQ(1, s2);
+
+    long l = 42;
+    int i5 = (int)l;
+    ASSERT_EQ(42, i5);
+
+    int i6 = 99;
+    long l2 = (long)i6;
+    ASSERT_EQ(99, (int)l2);
+
+    char c3 = 10;
+    short s3 = (short)c3;
+    int i7 = (int)s3;
+    long l3 = (long)i7;
+    ASSERT_EQ(10, (int)l3);
+
+    int ca = 42;
+    int cb = -(int)ca;
+    ASSERT_EQ(-42, cb);
+
+    char ce = 65;
+    int result = (int)ce + (int)ce;
+    ASSERT_EQ(130, result);
+
+    char ca2 = 5;
+    char cb2 = 5;
+    int sum = (int)ca2 + (int)cb2;
+    ASSERT_EQ(10, sum);
+
+    short s1 = 10;
+    short s2b = 10;
+    int sum2 = (int)s1 + (int)s2b;
+    ASSERT_EQ(20, sum2);
+
+    long l1 = 15;
+    long l2b = 15;
+    int sum3 = (int)(l1 + l2b);
+    ASSERT_EQ(30, sum3);
+
+    char cn = -10;
+    int in = (int)cn;
+    ASSERT_EQ(10, -in);
+
+    char cf = get_char();
+    int ifr = (int)get_char();
+    ASSERT_EQ(65, cf);
+    ASSERT_EQ(65, ifr);
+
+    char cmp = 42;
+    int icmp = 42;
+    ASSERT_EQ(1, (int)cmp == icmp);
+
+    long lc = 55;
+    char cc2 = (char)(short)(int)lc;
+    ASSERT_EQ(55, cc2);
+}
-- 
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