Add methods for Array and Dictionary

Tests/HummingbirdMustacheTests/MethodTests.swift

@@ -0,0 +1,60 @@
+import XCTest
+@testable import HummingbirdMustache
+
+final class MethodTests: XCTestCase {
+    func testLowercased() throws {
+        let template = try HBMustacheTemplate(string: """
+            {{ lowercased(name) }}
+            """)
+        let object: [String: Any] = ["name": "Test"]
+        XCTAssertEqual(template.render(object), "test")
+    }
+
+    func testUppercased() throws {
+        let template = try HBMustacheTemplate(string: """
+            {{ uppercased(name) }}
+            """)
+        let object: [String: Any] = ["name": "Test"]
+        XCTAssertEqual(template.render(object), "TEST")
+    }
+
+    func testReversed() throws {
+        let template = try HBMustacheTemplate(string: """
+            {{#reversed(repo)}}
+              <b>{{ name }}</b>
+            {{/repo}}
+            """)
+        let object: [String: Any] = ["repo": [["name": "resque"], ["name": "hub"], ["name": "rip"]]]
+        XCTAssertEqual(template.render(object), """
+              <b>rip</b>
+              <b>hub</b>
+              <b>resque</b>
+
+            """)
+    }
+
+    func testArrayEnumerated() throws {
+        let template = try HBMustacheTemplate(string: """
+            {{#enumerated(repo)}}
+              <b>{{ offset }}) {{ element.name }}</b>
+            {{/repo}}
+            """)
+        let object: [String: Any] = ["repo": [["name": "resque"], ["name": "hub"], ["name": "rip"]]]
+        XCTAssertEqual(template.render(object), """
+              <b>0) resque</b>
+              <b>1) hub</b>
+              <b>2) rip</b>
+
+            """)
+    }
+
+    func testDictionaryEnumerated() throws {
+        let template = try HBMustacheTemplate(string: """
+            {{#enumerated(.)}}<b>{{ element.key }} = {{ element.value }}</b>{{/.}}
+            """)
+        let object: [String: Any] = ["one": 1, "two": 2]
+        let result = template.render(object)
+        XCTAssertTrue(result == "<b>one = 1</b><b>two = 2</b>" || result == "<b>two = 2</b><b>one = 1</b>")
+    }
+
+}