fix(if): Treat below 0 numbers as negative

CHANGELOG.md

@@ -33,6 +33,8 @@
 - Templates can now extend templates that extend other templates.
   [#60](https://github.com/kylef/Stencil/issues/60)
 
+- If comparisons will now treat 0 and below numbers as negative.
+
 
 ## 0.6.0
 

Sources/IfTag.swift

@@ -65,6 +65,12 @@ class IfNode : NodeType {
       truthy = !result.isEmpty
     } else if let result = result as? Bool {
       truthy = result
+    } else if let result = result as? Int {
+      truthy = result > 0
+    } else if let result = result as? Float {
+      truthy = result > 0
+    } else if let result = result as? Double {
+      truthy = result > 0
     } else if result != nil {
       truthy = true
     }

Tests/StencilTests/IfNodeSpec.swift

@@ -123,6 +123,36 @@ func testIfNode() {
         let node = IfNode(variable: "items", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
         try expect(try node.render(arrayContext)) == "false"
       }
+
+      $0.it("renders the false when integer is below 1") {
+        let context = Context(dictionary: ["value": 0])
+        let node = IfNode(variable: "value", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(context)) == "false"
+
+        let negativeContext = Context(dictionary: ["value": -5])
+        let negativeNode = IfNode(variable: "value", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try negativeNode.render(negativeContext)) == "false"
+      }
+
+      $0.it("renders the false when float is below 1") {
+        let context = Context(dictionary: ["value": Float(0)])
+        let node = IfNode(variable: "value", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(context)) == "false"
+
+        let negativeContext = Context(dictionary: ["value": Float(-5)])
+        let negativeNode = IfNode(variable: "value", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try negativeNode.render(negativeContext)) == "false"
+      }
+
+      $0.it("renders the false when double is below 1") {
+        let context = Context(dictionary: ["value": Double(0)])
+        let node = IfNode(variable: "value", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(context)) == "false"
+
+        let negativeContext = Context(dictionary: ["value": Double(-5)])
+        let negativeNode = IfNode(variable: "value", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try negativeNode.render(negativeContext)) == "false"
+      }
     }
   }
 }