TDD practice

Password.cpp

@@ -1,5 +1,6 @@
 #include "Password.h"
 #include <string>
+#include <cctype>
 
 using std::string;
 
@@ -19,11 +20,28 @@ int Password::count_leading_characters(string phrase){
   return repetition;
 }
 
-
 /*
   receives a string and returns whether it has both at least one upper-case
   letter and at least one lower-case letter
 */
 bool Password::has_mixed_case(string pass){
+  bool has_upper_case = false;
+  bool has_lower_case = false;
+
+  for(int i = 0; i < pass.size(); i++){
+    char ch = pass[i];
+    if (isupper(ch)){
+      has_upper_case = true;
+    }
+    if (islower(ch)){
+      has_lower_case = true;
+    }
+
+    if(has_lower_case && has_upper_case){
+      return true;
+    }
+
+  }
+
   return false;
-}
+}

PasswordTest.cpp

@@ -19,4 +19,46 @@ TEST(PasswordTest, single_letter_password)
 	Password my_password;
 	int actual = my_password.count_leading_characters("Z");
 	ASSERT_EQ(1, actual);
-}
+}
+
+TEST(PasswordTest, all_lowercase_password) {
+    Password my_password;
+    bool actual = my_password.has_mixed_case("password");
+    ASSERT_EQ(false, actual);  //Should return false since there are no uppercase letters
+}
+
+TEST(PasswordTest, all_uppercase_password) {
+    Password my_password;
+    bool actual = my_password.has_mixed_case("PASSWORD");
+    ASSERT_EQ(false, actual);  //Should return false since there are no lowercase letters
+}
+
+TEST(PasswordTest, mixed_case_password) {
+    Password my_password;
+    bool actual = my_password.has_mixed_case("PassWord");
+    ASSERT_EQ(true, actual);  //Should return true since both uppercase and lowercase letters are present
+}
+
+TEST(PasswordTest, single_lowercase_character) {
+    Password my_password;
+    bool actual = my_password.has_mixed_case("a");
+    ASSERT_EQ(false, actual);  //Should return false since there is only one lowercase letter
+}
+
+TEST(PasswordTest, single_uppercase_character) {
+    Password my_password;
+    bool actual = my_password.has_mixed_case("A");
+    ASSERT_EQ(false, actual);  //Should return false since there is only one uppercase letter
+}
+
+TEST(PasswordTest, empty_string) {
+    Password my_password;
+    bool actual = my_password.has_mixed_case("");
+    ASSERT_EQ(false, actual);  //Should return false since the string is empty
+}
+
+TEST(PasswordTest, mixed_case_with_numbers_and_symbols) {
+    Password my_password;
+    bool actual = my_password.has_mixed_case("P@ssw0rd!");
+    ASSERT_EQ(true, actual);  //Should return true since both uppercase and lowercase letters are present
+}