add unit test

Author: colin-passiv

README.md

@@ -36,6 +36,7 @@ One possible usecase is in Scala js projects to move html into their own file.
 e.g.
 
 ```scala
+import com.passivsystems.embed.Embed._
 import org.scalajs.dom
 def el[T <: dom.raw.Element](id: String) =
     dom.document.getElementById(id).asInstanceOf[T]

build.sbt

@@ -7,3 +7,5 @@ version := "0.0.1"
 scalaVersion :=  "2.11.7"
 
 libraryDependencies <+= scalaVersion("org.scala-lang" % "scala-reflect" % _)  // for scala macro
+
+libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % Test

src/main/scala/Embed.scala

@@ -62,8 +62,9 @@ package object Embed {
 
     def interpolateExpr(c: Context)(content: String): c.Expr[String] = {
       import c.universe._
-      val parts = content.split("\\$\\{([^\\}]*)\\}").toSeq
-      val args = "\\$\\{([^\\}]*)\\}".r.findAllMatchIn(content).map(_.group(1)).map(c.parse(_)).toSeq
+      val regex = "\\$\\{([^\\}]*)\\}"
+      val parts = content.split(regex).toSeq
+      val args = regex.r.findAllMatchIn(content).map(_.group(1)).map(c.parse(_)).toSeq
       c.Expr[String](q"scala.StringContext(..$parts).s(..$args)")
     }
 

src/test/scala/EmbedTest.scala

@@ -0,0 +1,29 @@
+import com.passivsystems.embed.Embed._
+
+import org.scalatest._
+
+class EmbedTest extends FlatSpec with Matchers {
+
+  private def contentOf(path: String) = {
+    val source = scala.io.Source.fromFile(path)
+    val content = source.mkString
+    source.close()
+    content
+  }
+
+  "Embed" should "include static file content" in {
+    val txt = embed("resource.txt")
+    val expectedTxt = contentOf("src/test/scala/resource.txt")
+    txt should be (expectedTxt)
+  }
+
+  it should "string interpolate static file content" in {
+    def test(guard: Boolean) = {
+      val txt = sEmbed("sResource.txt")
+      val expectedTxt = s"the guard is: ${if (guard) "TRUE" else "FALSE"}\n"
+      txt should be (expectedTxt)
+    }
+    test(true)
+    test(false)
+  }
+}

src/test/scala/resource.txt

@@ -0,0 +1,3 @@
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce congue neque quam, in dignissim mi porttitor ut. Nunc pulvinar leo id commodo lobortis. Nunc magna felis, suscipit sed bibendum et, sodales iaculis nunc. Nunc eros velit, suscipit quis leo vitae, facilisis ultrices velit. Curabitur ultrices aliquam metus, id sagittis est semper id. Maecenas quam ex, lobortis at aliquet eget, lobortis eget est. Cras efficitur dolor vitae arcu aliquet, vel bibendum sem sollicitudin. Maecenas et tempus leo, eget aliquam quam. Aenean semper sollicitudin vestibulum.
+
+Aliquam sed ex malesuada urna molestie pellentesque. In vel magna consectetur, efficitur massa id, aliquet risus. Integer quis ornare sem, non sollicitudin augue. Sed cursus tellus libero. Pellentesque imperdiet tempus aliquam. Proin efficitur, nulla sed tempus laoreet, odio velit imperdiet lectus, ut convallis augue metus eleifend nibh. Suspendisse egestas non augue eu dapibus. Phasellus quis viverra odio. Sed ut blandit ipsum. Integer scelerisque sollicitudin diam eu suscipit. 

src/test/scala/sResource.txt

@@ -0,0 +1 @@
+the guard is: ${if (guard) "TRUE" else "FALSE"}