add more toBeSumOf() tests

Author: faissaloux

Diff for: src/Expectation.php

@@ -145,12 +145,14 @@ public function toBeLogarithmOf(float $number, float $base = M_E): PestExpectati
     public function toBeSumOf(array $numbers): PestExpectation
     {
         $sum = 0;
+
         foreach ($numbers as $number) {
             expect($number)->toBeNumeric();
+
             $sum += $number;
         }
 
-        return expect($this->value === $sum)->toBeTrue("$this->value !== $sum");
+        return expect($this->value === $sum)->toBeTrue("$this->value doesn't equal $sum");
     }
 
     /**

Diff for: tests/toBeSumOf.php

@@ -5,14 +5,17 @@
 it('passes', function (int $sum, array $numbers): void {
     expect($sum)->toBeSumOf($numbers);
 })->with([
-    [10, [3, 3, 4]],
+    [0, []],
+    [0, [-1, 0, 1]],
+    [10, [3, '3', 4]],
     [20, [4, 4, 4, 4, 4]],
+    [-20, [-4, -30, 14]],
     [30, [5, 5, 5, 5, 5, 5]],
     [40, [6, 6, 6, 6, 6, 6, 4]],
     [50, [7, 7, 7, 7, 7, 7, 7, 1]],
     [72, [8, 8, 8, 8, 8, 8, 8, 8, 8]],
     [88, [9, 9, 9, 9, 9, 9, 9, 9, 9, 7]],
-    [110, [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10]],
+    [110, [10, 10, 10, 10, 10, 10, '10', 10, 10, 10, 10]],
 ]);
 
 it('passes not', function (array $numbers): void {
@@ -24,8 +27,12 @@
     [[1, 2, 3, 4, 5]],
 ]);
 
+it('fails if not number on the list', function (): void {
+    expect(0)->toBeSumOf([2, 1, 3, 'not number', 78, 99]);
+})->throws(ExpectationFailedException::class);
+
 test('failures', function (): void {
-    expect(1)->toBeSumOf([]);
+    expect(1)->toBeSumOf([1, 2]);
 })->throws(ExpectationFailedException::class);
 
 test('failures not', function (): void {