Add Package.swift and move files around

Tests/Nodes/NodeSpec.swift

@@ -0,0 +1,58 @@
+import Spectre
+import Stencil
+
+
+class ErrorNode : NodeType {
+  func render(context: Context) throws -> String {
+    throw TemplateSyntaxError("Custom Error")
+  }
+}
+
+
+describe("Node") {
+  let context = Context(dictionary: [
+    "name": "Kyle",
+    "age": 27,
+    "items": [1, 2, 3],
+  ])
+
+  $0.describe("TextNode") {
+    $0.it("renders the given text") {
+      let node = TextNode(text: "Hello World")
+      try expect(try node.render(context)) == "Hello World"
+    }
+  }
+
+  $0.describe("VariableNode") {
+    $0.it("resolves and renders the variable") {
+      let node = VariableNode(variable: Variable("name"))
+      try expect(try node.render(context)) == "Kyle"
+    }
+
+    $0.it("resolves and renders a non string variable") {
+      let node = VariableNode(variable: Variable("age"))
+      try expect(try node.render(context)) == "27"
+    }
+  }
+
+  $0.describe("rendering nodes") {
+    $0.it("renders the nodes") {
+      let nodes: [NodeType] = [
+        TextNode(text:"Hello "),
+        VariableNode(variable: "name"),
+      ]
+
+      try expect(try renderNodes(nodes, context)) == "Hello Kyle"
+    }
+
+    $0.it("correctly throws a nodes failure") {
+      let nodes: [NodeType] = [
+        TextNode(text:"Hello "),
+        VariableNode(variable: "name"),
+        ErrorNode(),
+      ]
+
+      try expect(try renderNodes(nodes, context)).toThrow(TemplateSyntaxError("Custom Error"))
+    }
+  }
+}