Giving up, fathom-cursor is not POSIX... for now

spells/cantrips/fathom-cursor

@@ -1,13 +1,13 @@
-#!/usr/bin/env sh
+#!/bin/bash
 
 # This spell reveals the x and y coordinates of the cursor in the terminal window.
 
 # Define the function to calculate the position of the cursor
 fathom_cursor() {
-    position=""
-    x=false
-    y=false
-    verbose=false
+    local position
+    local x=false
+    local y=false
+    local verbose=false
     while getopts 'vxy' flag; do
         case "${flag}" in
             --verbose|v) verbose=true ;;
@@ -19,8 +19,8 @@ fathom_cursor() {
     # Get the position of the cursor
     position=$(IFS=';' read -sdR -p $'\E[6n' ROW COL; printf "%s;%s" "${ROW#*[}" "$COL")
 
-    if [ "$x" = true ] && [ "$y" = true ]; then
-        if [ "$verbose" = true ]; then
+    if [ $x = true ] && [ $y = true ]; then
+        if [ $verbose = true ]; then
         	printf "X: %s\n" "${position##*;}"
          	printf "Y: %s\n" "${position%%;*}"
         else
@@ -28,18 +28,18 @@ fathom_cursor() {
          	printf "%s\n" "${position%%;*}"
         fi
     else
-        if [ "$x" = true ]; then
-            if [ "$verbose" = true ]; then
+        if [ $x = true ]; then
+            if [ $verbose = true ]; then
                 printf "X: "
             fi
             printf "%s\n" "${position##*;}"
-        elif [ "$y" = true ]; then
-            if [ "$verbose" = true ]; then
+        elif [ $y = true ]; then
+            if [ $verbose = true ]; then
                 printf "Y: "
             fi
             printf "%s\n" "${position%%;*}"
         else
-            if [ "$verbose" = true ]; then
+            if [ $verbose = true ]; then
                 printf "Position: "
             fi
             printf "%s\n" "$position"
@@ -47,5 +47,18 @@ fathom_cursor() {
     fi
 }
 
-# Call the function
+test_fathom_cursor() {
+    assert_equal "$(./fathom-cursor -x)" "$(./fathom-cursor -y)" "fathom_cursor -x and -y outputs differ"
+    assert_equal "$(./fathom-cursor -x -v)" "X: $(./fathom-cursor -x)" "fathom_cursor -x and -x -v outputs differ"
+    assert_equal "$(./fathom-cursor -y -v)" "Y: $(./fathom-cursor -y)" "fathom_cursor -y and -y -v outputs differ"
+    assert_equal "$(./fathom-cursor -x -y -v)" "X: $(./fathom-cursor -x)\nY: $(./fathom-cursor -y)" "fathom_cursor -x -y and -x -y -v outputs differ"
+    assert_equal "$(./fathom-cursor -v -x -y)" "Position: $(./fathom-cursor -x -y)" "fathom_cursor -v -x -y and -x -y outputs differ"
+    assert_equal "$(./fathom-cursor -v)" "$(./fathom-cursor -x -y -v)" "fathom_cursor -v and -x -y -v outputs differ"
+    assert_equal "$(./fathom-cursor)" "$(./fathom-cursor -x -y)" "fathom_cursor and -x -y outputs differ"
+}
+
+# Check if the script is being called from another script
+if [ "${BASH_SOURCE[0]}" = "$0" ]; then
+  # If not, call the function
   fathom_cursor "$@"
+fi