implement bug fix by making assertion functions search for characters following specified value

Author: James Judd

src/Illuminate/Foundation/Testing/TestResponse.php

@@ -466,12 +466,12 @@ public function assertJsonFragment(array $data)
         ));
 
         foreach (Arr::sortRecursive($data) as $key => $value) {
-            $expected = substr(json_encode([$key => $value]), 1, -1);
+            $expected = $this->jsonSearchStrings($key, $value);
 
             PHPUnit::assertTrue(
                 Str::contains($actual, $expected),
                 'Unable to find JSON fragment: '.PHP_EOL.PHP_EOL.
-                "[{$expected}]".PHP_EOL.PHP_EOL.
+                "[". json_encode([$key => $value]) ."]".PHP_EOL.PHP_EOL.
                 'within'.PHP_EOL.PHP_EOL.
                 "[{$actual}]."
             );
@@ -498,12 +498,12 @@ public function assertJsonMissing(array $data, $exact = false)
         ));
 
         foreach (Arr::sortRecursive($data) as $key => $value) {
-            $unexpected = substr(json_encode([$key => $value]), 1, -1);
+            $unexpected = $this->jsonSearchStrings($key, $value);
 
             PHPUnit::assertFalse(
                 Str::contains($actual, $unexpected),
                 'Found unexpected JSON fragment: '.PHP_EOL.PHP_EOL.
-                "[{$unexpected}]".PHP_EOL.PHP_EOL.
+                "[".json_encode([$key => $value])."]".PHP_EOL.PHP_EOL.
                 'within'.PHP_EOL.PHP_EOL.
                 "[{$actual}]."
             );
@@ -525,7 +525,7 @@ public function assertJsonMissingExact(array $data)
         ));
 
         foreach (Arr::sortRecursive($data) as $key => $value) {
-            $unexpected = substr(json_encode([$key => $value]), 1, -1);
+            $unexpected = $this->jsonSearchStrings($key, $value);
 
             if (! Str::contains($actual, $unexpected)) {
                 return $this;
@@ -540,6 +540,27 @@ public function assertJsonMissingExact(array $data)
         );
     }
 
+    /**
+     * TestResponse::assertJsonFragment and TestResponse::assertJsonMissing search for
+     * JSON encoded strings in the Response. This function returns the set of strings to
+     * be searched for in the response, explicitly adding all of the possible characters
+     * which could follow $value in the response.
+     *
+     * @param $key
+     * @param $value
+     * @return array
+     */
+    protected function jsonSearchStrings($key, $value)
+    {
+        $needle = substr(json_encode([$key => $value]), 1, -1);
+
+        return [
+            $needle . ']',
+            $needle . '}',
+            $needle . ',',
+        ];
+    }
+
     /**
      * Assert that the response has a given JSON structure.
      *