add bracket syntax support and unit tests

README.md

@@ -4,7 +4,7 @@ Liquescent
 [![Build Status](https://www.travis-ci.org/edadma/liquescent.svg?branch=master)](https://www.travis-ci.org/edadma/liquescent)
 [![Coverage Status](https://coveralls.io/repos/github/edadma/liquescent/badge.svg?branch=master)](https://coveralls.io/github/edadma/liquescent?branch=master)
 [![License](https://img.shields.io/badge/license-ISC-blue.svg)](https://github.com/edadma/liquescent/blob/master/LICENSE)
-[![Version](https://img.shields.io/badge/latest_release-v0.1.7-orange.svg)](https://github.com/edadma/liquescent/releases/tag/v0.1.7)
+[![Version](https://img.shields.io/badge/latest_release-v0.1.8-orange.svg)](https://github.com/edadma/liquescent/releases/tag/v0.1.8)
 
 *Liquescent* is an implementation of the [Liquid](https://shopify.github.io/liquid/) templating language for the [Scala](http://scala-lang.org) programming language.
 
@@ -52,7 +52,7 @@ This program prints
 This next example shows how to use *Liquescent* as an executable on the command line.
 
 ```bash
-echo "{{ v | join: \", \" }}" | java -jar liquescent-0.1.7.jar -j "{v: [\"one\", \"two\", \"three\"]}" --
+echo "{{ v | join: \", \" }}" | java -jar liquescent-0.1.8.jar -j "{v: [\"one\", \"two\", \"three\"]}" --
 ```
 
 The above command prints
@@ -74,7 +74,7 @@ Use the following definition to use Liquescent in your Maven project:
 <dependency>
   <groupId>xyz.hyperreal</groupId>
   <artifactId>liquescent</artifactId>
-  <version>0.1.7</version>
+  <version>0.1.8</version>
 </dependency>
 ```
 
@@ -83,7 +83,7 @@ Add the following to your `build.sbt` file to use Liquescent in your SBT project
 ```sbt
 resolvers += "Hyperreal Repository" at "https://dl.bintray.com/edadma/maven"
 
-libraryDependencies += "xyz.hyperreal" %% "liquescent" % "0.1.7"
+libraryDependencies += "xyz.hyperreal" %% "liquescent" % "0.1.8"
 ```
 
 Building

build.sbt

@@ -1,6 +1,6 @@
 name := "liquescent"
 
-version := "0.1.7"
+version := "0.1.8"
 
 scalaVersion := "2.12.5"
 

src/main/scala/Interpreter.scala

@@ -205,8 +205,14 @@ class Interpreter( filters: Map[String, Filter], tags: Map[String, Tag], assigns
 					case (a: BigInt, b: BigInt) => a to b by 1
 					case (a, b) => sys.error( s"invalid range limits: $a, $b" )
 				}) toList
-      case DotExpressionAST( expr, name ) =>
-        eval( expr ) match {
+      case ArrayExpressionAST( exp, index ) =>
+        (eval( exp ), eval( index )) match {
+          case (m: collection.Map[_, _], i: String) => m.asInstanceOf[collection.Map[String, Any]](i)
+          case (s: Seq[_], i: Number) => s.asInstanceOf[Seq[Any]]( i.intValue )
+          case (a, b) => sys.error( s"bracket syntax not applicable: $a, $b" )
+        }
+      case DotExpressionAST( exp, name ) =>
+        eval( exp ) match {
           case `nil` => nil
           case m: collection.Map[_, _] =>
             m.asInstanceOf[collection.Map[String, Any]] get name match {

src/main/scala/Main.scala

@@ -15,9 +15,9 @@ object Main extends App {
 
 	def usage {
 		"""
-			|liquescent v0.1.7
+			|liquescent v0.1.8
 			|
-			|Usage:  java -jar liquescent-0.1.7.jar <options> <liquid template>
+			|Usage:  java -jar liquescent-0.1.8.jar <options> <liquid template>
 			|
 			|Options:  --help              display this help and exit
 			|          -s <name> <string>  assign <string> to variable <name>

src/test/scala/TypesTests.scala

@@ -11,4 +11,19 @@ class TypesTests extends FreeSpec with PropertyChecks with Matchers with Testing
 		test( "The current user is {{ user.name }}", false ) shouldBe "The current user is "
 	}
 
+  "bracket" in {
+    test(
+      """
+        |{{ site.users[0] }}
+        |{{ site.users[1] }}
+        |{{ site.users[3] }}
+      """.stripMargin, true, "site" -> Map("users" -> List("Tobi", "Laura", "Tetsuro", "Adam"))
+    ) shouldBe "Tobi Laura Adam"
+    test(
+      """
+        |{{ site['users'] | join: ", " }}
+      """.stripMargin, true, "site" -> Map("users" -> List("Tobi", "Laura", "Tetsuro", "Adam"))
+    ) shouldBe "Tobi, Laura, Tetsuro, Adam"
+  }
+
 }