feat(for loop): added property for loop length (#171)

CHANGELOG.md

@@ -14,6 +14,7 @@
 - Allow using new lines inside tags
 - Added support for iterating arrays of tuples
 - Added support for ranges in if-in expression
+- Added property `forloop.length` to get number of items in the loop
 
 ### Bug Fixes
 

Sources/ForTag.swift

@@ -132,6 +132,7 @@ class ForNode : NodeType {
           "last": index == (count - 1),
           "counter": index + 1,
           "counter0": index,
+          "length": count
         ]
 
         return try context.push(dictionary: ["forloop": forContext]) {

Tests/StencilTests/ForNodeSpec.swift

@@ -90,6 +90,12 @@ func testForNode() {
       try expect(try node.render(context)) == "102132"
     }
 
+    $0.it("renders the given nodes while providing loop length") {
+      let nodes: [NodeType] = [VariableNode(variable: "item"), VariableNode(variable: "forloop.length")]
+      let node = ForNode(resolvable: Variable("items"), loopVariables: ["item"], nodes: nodes, emptyNodes: [])
+      try expect(try node.render(context)) == "132333"
+    }
+
     $0.it("renders the given nodes while filtering items using where expression") {
         let nodes: [NodeType] = [VariableNode(variable: "item"), VariableNode(variable: "forloop.counter")]
         let `where` = try parseExpression(components: ["item", ">", "1"], tokenParser: TokenParser(tokens: [], environment: Environment()))