replace assertEmpty() with stricter assertions

Author: xabbuh

Tests/LanguagesTest.php

@@ -1725,7 +1725,7 @@ public function testGetNames($displayLocale)
         sort($languages);
 
         $this->assertNotEmpty($languages);
-        $this->assertEmpty(array_diff($languages, self::LANGUAGES));
+        $this->assertSame([], array_diff($languages, self::LANGUAGES));
 
         foreach (Languages::getAlpha3Names($displayLocale) as $alpha3Code => $name) {
             $alpha2Code = self::ALPHA3_TO_ALPHA2[$alpha3Code] ?? null;
@@ -1928,7 +1928,7 @@ public function testGetAlpha3Names($displayLocale)
         sort($languages);
 
         $this->assertNotEmpty($languages);
-        $this->assertEmpty(array_diff($languages, self::ALPHA3_CODES));
+        $this->assertSame([], array_diff($languages, self::ALPHA3_CODES));
 
         foreach (Languages::getNames($displayLocale) as $alpha2Code => $name) {
             $alpha3Code = self::ALPHA2_TO_ALPHA3[$alpha2Code] ?? (3 === \strlen($alpha2Code) ? $alpha2Code : null);

Tests/LocalesTest.php

@@ -46,7 +46,7 @@ public function testGetNames($displayLocale)
         // We can't assert on exact list of locale, as there's too many variations.
         // The best we can do is to make sure getNames() returns a subset of what getLocales() returns.
         $this->assertNotEmpty($locales);
-        $this->assertEmpty(array_diff($locales, static::getLocales()));
+        $this->assertSame([], array_diff($locales, static::getLocales()));
     }
 
     public function testGetNamesDefaultLocale()

Tests/ScriptsTest.php

@@ -254,7 +254,7 @@ public function testGetNames($displayLocale)
         // We can't assert on exact list of scripts, as there's too many variations between locales.
         // The best we can do is to make sure getNames() returns a subset of what getScripts() returns.
         $this->assertNotEmpty($scripts);
-        $this->assertEmpty(array_diff($scripts, self::$scripts));
+        $this->assertSame([], array_diff($scripts, self::$scripts));
     }
 
     public function testGetNamesDefaultLocale()

Tests/TimezonesTest.php

@@ -473,7 +473,7 @@ public function testGetNames($displayLocale)
         sort($zones);
 
         $this->assertNotEmpty($zones);
-        $this->assertEmpty(array_diff($zones, self::ZONES));
+        $this->assertSame([], array_diff($zones, self::ZONES));
     }
 
     public function testGetNamesDefaultLocale()