add edge cases for sus user

Author: dreamer-coding

code/tests/cases/test_input.c

@@ -342,6 +342,36 @@ FOSSIL_TEST(c_test_io_validate_sanitize_string_clean) {
     ASSUME_ITS_EQUAL_CSTR(input, output);
 }
 
+FOSSIL_TEST(c_test_io_validate_is_suspicious_user_many_digits) {
+    const char *input = "user1234567890";
+    int result = fossil_io_validate_is_suspicious_user(input);
+    ASSUME_ITS_TRUE(result);
+}
+
+FOSSIL_TEST(c_test_io_validate_is_suspicious_user_high_digit_ratio) {
+    const char *input = "a1b2c3d4e5f6g7h8i9j0";
+    int result = fossil_io_validate_is_suspicious_user(input);
+    ASSUME_ITS_TRUE(result);
+}
+
+FOSSIL_TEST(c_test_io_validate_is_suspicious_user_contains_test) {
+    const char *input = "testuser";
+    int result = fossil_io_validate_is_suspicious_user(input);
+    ASSUME_ITS_TRUE(result);
+}
+
+FOSSIL_TEST(c_test_io_validate_is_suspicious_user_contains_fake) {
+    const char *input = "fakeaccount";
+    int result = fossil_io_validate_is_suspicious_user(input);
+    ASSUME_ITS_TRUE(result);
+}
+
+FOSSIL_TEST(c_test_io_validate_is_suspicious_user_entropy) {
+    const char *input = "x7q9z2w8v5r1t3y6u0";
+    int result = fossil_io_validate_is_suspicious_user(input);
+    ASSUME_ITS_TRUE(result);
+}
+
 // * * * * * * * * * * * * * * * * * * * * * * * *
 // * Fossil Logic Test Pool
 // * * * * * * * * * * * * * * * * * * * * * * * *
@@ -377,6 +407,11 @@ FOSSIL_TEST_GROUP(c_input_tests) {
     FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_sanitize_string_script);
     FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_sanitize_string_sql);
     FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_sanitize_string_clean);
+    FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_is_suspicious_user_many_digits);
+    FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_is_suspicious_user_high_digit_ratio);
+    FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_is_suspicious_user_contains_test);
+    FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_is_suspicious_user_contains_fake);
+    FOSSIL_TEST_ADD(c_input_suite, c_test_io_validate_is_suspicious_user_entropy);
 
     FOSSIL_TEST_ADD(c_input_suite, c_test_io_register_keybinding_success);
     FOSSIL_TEST_ADD(c_input_suite, c_test_io_register_keybinding_duplicate);