Test toupper() and tolower() for entire string

tests.asm

@@ -44,7 +44,11 @@ section	.rodata
 	msgStrcat	db	"strcat(str1Copy, str3): %s",10,0
 	msgStrlen3	db	"strlen(str1Copy): %d",10,0
 	msgTolower	db	"tolower(str1[0]): %c",10,0
-	msgToupper	db	"toupper(str1[1]): %c",10,0
+	msgTolower2	db	"tolower(str1[1]): %c",10,0
+	msgTolower3	db	"tolower() for whole str1Copy: %s",10,0
+	msgToupper	db	"toupper(str1[0]): %c",10,0
+	msgToupper2	db	"toupper(str1[1]): %c",10,0
+	msgToupper3	db	"toupper() for whole str1Copy: %s",10,0
 section	.data
 section	.bss
 	str1Copy	resb	32
@@ -205,14 +209,69 @@ main:
 	xor	rax, rax
 	lea	rdi, [rel msgTolower]
 	call	printf
-
+	; ...str1[1]
-	; TEST: toupper(str1[1])
 	lea	rdi, [rel str1+1]
+	call	tolower
+	mov	rsi, rax
+	xor	rax, rax
+	lea	rdi, [rel msgTolower2]
+	call	printf
+	
+	; TEST: toupper(str1[0])
+	lea	rdi, [rel str1]
 	call	toupper
 	mov	rsi, rax
 	xor	rax, rax
 	lea	rdi, [rel msgToupper]
 	call	printf
+	; ...str1[1]
+	lea	rdi, [rel str1+1]
+	call	toupper
+	mov	rsi, rax
+	xor	rax, rax
+	lea	rdi, [rel msgToupper2]
+	call	printf
 
+	; TEST: tolower: entire str1Copy
+	lea	rdi, [rel str1Copy]
+	call	strlen
+	mov	rcx, rax
+	.tolowerLoop:
+		movzx	r10, byte [rdi]
+		mov	byte [rdi], r10b
+		push	rcx
+		sub	rsp, 8
+		call	tolower
+		add	rsp, 8
+		pop	rcx
+		mov	byte [rdi], al
+		inc	rdi
+		inc	r10
+		loop	.tolowerLoop
+	xor	rax, rax
+	lea	rdi, [rel msgTolower3]
+	lea	rsi, [rel str1Copy]
+	call	printf
+
+	; TEST: toupper: entire str1Copy
+	lea	rdi, [rel str1Copy]
+	call	strlen
+	mov	rcx, rax
+	.toupperLoop:
+		movzx	r10, byte [rdi]
+		mov	byte [rdi], r10b
+		push	rcx
+		sub	rsp, 8
+		call	toupper
+		add	rsp, 8
+		pop	rcx
+		mov	byte [rdi], al
+		inc	rdi
+		inc	r10
+		loop	.toupperLoop
+	xor	rax, rax
+	lea	rdi, [rel msgToupper3]
+	lea	rsi, [rel str1Copy]
+	call	printf
 	leave
 	ret