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/switch.c | 148 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 tests/switch.c

(limited to 'tests/switch.c')

diff --git a/tests/switch.c b/tests/switch.c
new file mode 100644
index 0000000..18368b2
--- /dev/null
+++ b/tests/switch.c
@@ -0,0 +1,148 @@
+#include <helpers.h>
+
+int switch_fallthrough(int x) {
+    switch (x) {
+    case 1:
+    case 2:
+        return 12;
+    case 3:
+    case 4:
+        return 34;
+    }
+    return 0;
+}
+
+int main() {
+    int x = 2;
+    int result = 0;
+
+    switch (x) {
+    case 1:
+        result = 10;
+        break;
+    case 2:
+        result = 20;
+        break;
+    case 3:
+        result = 30;
+        break;
+    }
+    ASSERT_EQ(20, result);
+
+    x = 5;
+    result = 0;
+    switch (x) {
+    case 1:
+        result = 10;
+        break;
+    case 2:
+        result = 20;
+        break;
+    default:
+        result = 99;
+        break;
+    }
+    ASSERT_EQ(99, result);
+
+    x = 2;
+    result = 0;
+    switch (x) {
+    case 1:
+        result = result + 10;
+    case 2:
+        result = result + 20;
+    case 3:
+        result = result + 30;
+        break;
+    }
+    ASSERT_EQ(50, result);
+
+    x = 1;
+    int y = 2;
+    result = 0;
+    switch (x) {
+    case 1:
+        switch (y) {
+        case 1:
+            result = 11;
+            break;
+        case 2:
+            result = 12;
+            break;
+        }
+        break;
+    case 2:
+        result = 20;
+        break;
+    }
+    ASSERT_EQ(12, result);
+
+    int a = 3;
+    int b = 2;
+    result = 0;
+    switch (a + b) {
+    case 4:
+        result = 40;
+        break;
+    case 5:
+        result = 50;
+        break;
+    case 6:
+        result = 60;
+        break;
+    }
+    ASSERT_EQ(50, result);
+
+    x = 2;
+    result = 0;
+    int temp = 0;
+    switch (x) {
+    case 1:
+        temp = 5;
+        result = temp * 2;
+        break;
+    case 2:
+        temp = 10;
+        result = temp * 2;
+        break;
+    case 3:
+        temp = 15;
+        result = temp * 2;
+        break;
+    }
+    ASSERT_EQ(20, result);
+    ASSERT_EQ(10, temp);
+
+    x = 1;
+    result = 0;
+    switch (x) {
+    case 1: {
+        int local = 100;
+        result = local;
+        break;
+    }
+    case 2: {
+        int local = 200;
+        result = local;
+        break;
+    }
+    }
+    ASSERT_EQ(100, result);
+
+    x = 10;
+    result = 42;
+    switch (x) {
+    case 1:
+        result = 10;
+        break;
+    case 2:
+        result = 20;
+        break;
+    }
+    ASSERT_EQ(42, result);
+
+    ASSERT_EQ(12, switch_fallthrough(1));
+    ASSERT_EQ(12, switch_fallthrough(2));
+    ASSERT_EQ(34, switch_fallthrough(3));
+    ASSERT_EQ(34, switch_fallthrough(4));
+}
-- 
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