test(strings): align error cases with the standard library

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

6 files changed, 6 insertions, 6 deletions

diff --git a/tests/iii/diagnostic-nested-call/case.json b/tests/iii/diagnostic-nested-call/case.json
index a00f88b..5bccd92 100644
--- a/tests/iii/diagnostic-nested-call/case.json
+++ b/tests/iii/diagnostic-nested-call/case.json
@@ -1,7 +1,7 @@
 {
   "errors": [
     {
-      "reason": "MID\\ expects\\ 3\\ args",
+      "reason": "Incorrect # arguments passed to MID",
       "line": 2
     }
   ]
diff --git a/tests/iii/diagnostic-nested-call/notes.md b/tests/iii/diagnostic-nested-call/notes.md
index 252dec7..548a7e0 100644
--- a/tests/iii/diagnostic-nested-call/notes.md
+++ b/tests/iii/diagnostic-nested-call/notes.md
@@ -1,3 +1,3 @@
 # diagnostic-nested-call
 
-The compiler must reject this program: MID expects 3 args. The diagnostic must identify line 2; compilation must preserve existing output.
+The compiler must reject this program: the standard-library MID function expects 3 arguments. The diagnostic must report the incorrect argument count on line 2; compilation must preserve existing output.
diff --git a/tests/iii/operator-global-errors/notes.md b/tests/iii/operator-global-errors/notes.md
index 24bb113..ef5c9c2 100644
--- a/tests/iii/operator-global-errors/notes.md
+++ b/tests/iii/operator-global-errors/notes.md
@@ -1,3 +1,3 @@
 # operator-global-errors
 
-Reject a STRING comparison result assigned to BOOLEAN, implicit INTEGER-to-REAL overload matching, builtin-only overloads, wrong arity and return-type-only duplicates.
+Reject a STRING comparison result assigned to BOOLEAN, implicit INTEGER-to-REAL overload matching, operator overloads with only INTEGER operands, wrong arity and return-type-only duplicates. STRING is a class and can participate in operator overloads, so the invalid declaration uses INTEGER for both operands.
diff --git a/tests/iii/operator-global-errors/program.cps b/tests/iii/operator-global-errors/program.cps
index 23bfae1..b9d007a 100644
--- a/tests/iii/operator-global-errors/program.cps
+++ b/tests/iii/operator-global-errors/program.cps
@@ -11,7 +11,7 @@ DECLARE a : Box
 DECLARE flag : BOOLEAN
 flag <- a < a
 OUTPUT a + 1
-OVERLOAD FUNCTION OPERATOR&(a : INTEGER, b : STRING) RETURNS STRING
+OVERLOAD FUNCTION OPERATOR&(a : INTEGER, b : INTEGER) RETURNS INTEGER
 RETURN b
 ENDFUNCTION
 OVERLOAD FUNCTION OPERATOR*(a : Box) RETURNS INTEGER
diff --git a/tests/iii/overload-errors/case.json b/tests/iii/overload-errors/case.json
index b31c666..f720889 100644
--- a/tests/iii/overload-errors/case.json
+++ b/tests/iii/overload-errors/case.json
@@ -21,7 +21,7 @@
       "line": 23
     },
     {
-      "reason": "built-in function and cannot be redefined",
+      "reason": "'EOF' is a built-in function and cannot be redefined",
       "line": 25
     },
     {
diff --git a/tests/iii/overload-errors/program.cps b/tests/iii/overload-errors/program.cps
index 13d4692..d510111 100644
--- a/tests/iii/overload-errors/program.cps
+++ b/tests/iii/overload-errors/program.cps
@@ -22,7 +22,7 @@ OVERLOAD PROCEDURE Bounds(a : ARRAY[1:2] OF INTEGER)
 ENDPROCEDURE
 OVERLOAD PROCEDURE Bounds(a : ARRAY[3:4] OF INTEGER)
 ENDPROCEDURE
-OVERLOAD FUNCTION LENGTH(x : INTEGER) RETURNS INTEGER
+OVERLOAD FUNCTION EOF(x : INTEGER) RETURNS INTEGER
 RETURN x
 ENDFUNCTION
 OUTPUT Exact("text")