fix: #3074 improve error message when using function max in `deriva…

…tive`

AUTHORS

@@ -233,6 +233,5 @@ BuildTools <[email protected]>
 Anik Patel <[email protected]>
 Vrushaket Chaudhari <[email protected]>
 Praise Nnamonu <[email protected]>
-vrushaket <[email protected]>
 
 # Generated by tools/update-authors.js

HISTORY.md

@@ -4,6 +4,7 @@
 
 - Fix #3025: improve handling of matrices and error handling 
   in function `corr` (#3030). Thanks @vrushaket.
+- Fix #3074: improve error message when using function `max` in `derivative`.
 
 
 # 2023-09-20, 11.11.1

src/function/algebra/derivative.js

@@ -765,7 +765,8 @@ export const createDerivative = /* #__PURE__ */ factory(name, dependencies, ({
     }
 
     node.compile().evaluate()
-    throw new Error('Expected TypeError, but none found')
+
+    throw new Error('Function "' + node.name + '" is not supported by derivative, or a wrong number of arguments is passed')
   }
 
   /**

test/unit-tests/function/algebra/derivative.test.js

@@ -238,8 +238,12 @@ describe('derivative', function () {
   })
 
   it('should throw error if expressions contain unsupported operators or functions', function () {
-    assert.throws(function () { derivative('x << 2', 'x') }, /Error: Operator "<<" is not supported by derivative/)
-    assert.throws(function () { derivative('subset(x)', 'x') }, /Error: Function "subset" is not supported by derivative/)
+    assert.throws(function () { derivative('x << 2', 'x') }, /Error: Operator "<<" is not supported by derivative, or a wrong number of arguments is passed/)
+    assert.throws(function () { derivative('subset(x)', 'x') }, /Error: Function "subset" is not supported by derivative, or a wrong number of arguments is passed/)
+    assert.throws(function () { derivative('max(x)', 'x') }, /Error: Function "max" is not supported by derivative, or a wrong number of arguments is passed/)
+    assert.throws(function () { derivative('max(x, y)', 'x') }, /Error: Function "max" is not supported by derivative, or a wrong number of arguments is passed/)
+    assert.throws(function () { derivative('max(x, 1)', 'x') }, /Error: Function "max" is not supported by derivative, or a wrong number of arguments is passed/)
+    assert.throws(function () { derivative('add(2,3,x)', 'x') }, /Error: Function "add" is not supported by derivative, or a wrong number of arguments is passed/)
   })
 
   it('should have controlled behavior on arguments errors', function () {