Implement Miniflux user deletion

lib/REST/Miniflux/V1.php

@@ -480,6 +480,15 @@ class V1 extends \JKingWeb\Arsse\REST\AbstractHandler {
         return new Response($out);
     }
 
+    protected function deleteUserByNum(array $path): ResponseInterface {
+        try {
+            Arsse::$user->remove(Arsse::$user->lookup((int) $path[1]));
+        } catch (ExceptionConflict $e) {
+            return new ErrorResponse("404", 404);
+        }
+        return new EmptyResponse(204);
+    }
+
     protected function getCategories(): ResponseInterface {
         $out = [];
         $meta = Arsse::$user->propertiesGet(Arsse::$user->id, false);

tests/cases/REST/Miniflux/TestV1.php

@@ -371,11 +371,35 @@ class TestV1 extends \JKingWeb\Arsse\Test\AbstractTest {
     }
 
     public function testAddAUserWithoutAuthority(): void {
-        Arsse::$user = $this->createMock(User::class);
-        Arsse::$user->method("propertiesGet")->willReturn(['num' => 1, 'admin' => false]);
         $this->assertMessage(new ErrorResponse("403", 403), $this->req("POST", "/users", []));
     }
 
+    public function testDeleteAUser(): void {
+        Arsse::$user = $this->createMock(User::class);
+        Arsse::$user->method("propertiesGet")->willReturn(['admin' => true]);
+        Arsse::$user->method("lookup")->willReturn("john.doe@example.com");
+        Arsse::$user->method("remove")->willReturn(true);
+        Arsse::$user->expects($this->exactly(1))->method("lookup")->with(2112);
+        Arsse::$user->expects($this->exactly(1))->method("remove")->with("john.doe@example.com");
+        $this->assertMessage(new EmptyResponse(204), $this->req("DELETE", "/users/2112"));
+    }
+
+    public function testDeleteAMissingUser(): void {
+        Arsse::$user = $this->createMock(User::class);
+        Arsse::$user->method("propertiesGet")->willReturn(['admin' => true]);
+        Arsse::$user->method("lookup")->willThrowException(new ExceptionConflict("doesNotExist"));
+        Arsse::$user->method("remove")->willReturn(true);
+        Arsse::$user->expects($this->exactly(1))->method("lookup")->with(2112);
+        Arsse::$user->expects($this->exactly(0))->method("remove");
+        $this->assertMessage(new ErrorResponse("404", 404), $this->req("DELETE", "/users/2112"));
+    }
+
+    public function testDeleteAUserWithoutAuthority(): void {
+        Arsse::$user->expects($this->exactly(0))->method("lookup");
+        Arsse::$user->expects($this->exactly(0))->method("remove");
+        $this->assertMessage(new ErrorResponse("403", 403), $this->req("DELETE", "/users/2112"));
+    }
+
     public function testListCategories(): void {
         \Phake::when(Arsse::$db)->folderList->thenReturn(new Result($this->v([
             ['id' => 1,  'name' => "Science"],