void test_multiple_whitespace(void) { TEST_IGNORE(); TEST_ASSERT_TRUE(is_isogram("Emily Jung Schwartzkopf")); }
void test_duplicated_letter_within_word(void) { TEST_IGNORE(); TEST_ASSERT_FALSE(is_isogram("accentor")); }
void test_non_letter_char(void) { TEST_IGNORE(); TEST_ASSERT_TRUE(is_isogram("thumbscrew-japingly")); }
void test_duplicated_non_letter_char(void) { TEST_IGNORE(); TEST_ASSERT_TRUE(is_isogram("Hjelmqvist-Gryb-Zock-Pfund-Wax")); }
void test_same_first_and_last_characters(void) { TEST_IGNORE(); TEST_ASSERT_FALSE(is_isogram("oreo")); }
void test_duplicated_letter_mixed_case(void) { TEST_IGNORE(); TEST_ASSERT_FALSE(is_isogram("Alphabet")); }
void test_duplicated_letter_from_end_of_alphabet(void) { TEST_IGNORE(); TEST_ASSERT_FALSE(is_isogram("zzyzx")); }
void test_longest_known_isogram(void) { TEST_IGNORE(); TEST_ASSERT_TRUE(is_isogram("subdermatoglyphic")); }
void test_duplicated_letter(void) { TEST_IGNORE(); TEST_ASSERT_FALSE(is_isogram("eleven")); }
void test_lower_case_only(void) { TEST_IGNORE(); TEST_ASSERT_TRUE(is_isogram("isogram")); }
void test_null(void) { TEST_IGNORE(); // delete this line to run test TEST_ASSERT_FALSE(is_isogram(NULL)); }
void test_empty_string(void) { TEST_ASSERT_TRUE(is_isogram("")); }
void test_null(void) { TEST_ASSERT_FALSE(is_isogram(NULL)); }