From a464bde43b50fbaa78505967cebefdb537a3131f Mon Sep 17 00:00:00 2001
From: Octavia Togami <octavia.togami@gmail.com>
Date: Tue, 25 Feb 2020 16:22:55 -0800
Subject: [PATCH] Fix not operator

(cherry picked from commit 00c7d3a157d8d859ede501d71282e82fba40e37b)
---
 .../internal/expression/invoke/ExpressionHandles.java    | 2 +-
 .../worldedit/internal/expression/ExpressionTest.java    | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/invoke/ExpressionHandles.java b/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/invoke/ExpressionHandles.java
index 372ef1645..892fca4fd 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/invoke/ExpressionHandles.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/invoke/ExpressionHandles.java
@@ -237,7 +237,7 @@ class ExpressionHandles {
     }
 
     private static boolean doubleToBool(double bool) {
-        return bool > 0;
+        return bool != 0;
     }
 
     static double boolToDouble(boolean bool) {
diff --git a/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java b/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java
index 985d06c20..9d915ebe7 100644
--- a/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java
+++ b/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java
@@ -92,6 +92,15 @@ class ExpressionTest extends BaseExpressionTest {
         checkTestCase("a=0; b=--a; a+b", -2);
     }
 
+    @Test
+    void testNot() {
+        checkTestCase("!0", 1);
+        checkTestCase("!1", 0);
+        checkTestCase("!2", 0);
+        checkTestCase("!-1", 0);
+        checkTestCase("!-2", 0);
+    }
+
     @Test
     public void testErrors() {
         // test lexer errors