Added more Scalatest specs

SpelHelper.iml

@@ -22,6 +22,10 @@
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/scala" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/target/classes" />
+      <excludeFolder url="file://$MODULE_DIR$/target/cobertura" />
+      <excludeFolder url="file://$MODULE_DIR$/target/generated-classes" />
+      <excludeFolder url="file://$MODULE_DIR$/target/javadoc-bundle-options" />
+      <excludeFolder url="file://$MODULE_DIR$/target/maven-archiver" />
       <excludeFolder url="file://$MODULE_DIR$/target/site" />
       <excludeFolder url="file://$MODULE_DIR$/target/surefire-reports" />
       <excludeFolder url="file://$MODULE_DIR$/target/test-classes" />

src/test/java/net/abhinavsarkar/spelhelper/Functions.java

@@ -6,6 +6,28 @@ public final class Functions {
         return str;
     }
 
+    static String testNonPublic(String str) {
+        return str;
+    }
+
+    public String testNonStatic(String str) {
+        return str;
+    }
+
+    public static void testVoid(String str) {
+        return;
+    }
+
+    public static String testNoArg() {
+        return "a";
+    }
+
+    public static String testContext(String str) {
+        if (SpelHelper.getCurrentContext() == null)
+            throw new AssertionError();
+        return str;
+    }
+
     @Override
     public boolean equals(Object o) {
         return o instanceof Functions;

src/test/scala/net/abhinavsarkar/spelhelper/ExtensionFunctionsSpec.scala

@@ -7,6 +7,7 @@ import org.scalatest.junit.ShouldMatchersForJUnit
 import java.util.{Set => JSet, HashSet,
   List => JList, ArrayList,
   Map => JMap, HashMap}
+import org.springframework.expression.spel.SpelEvaluationException
 
 @RunWith(classOf[JUnitRunner])
 class ExtensionFunctionsSpec extends FlatSpec with ShouldMatchersForJUnit {
@@ -32,4 +33,10 @@ class ExtensionFunctionsSpec extends FlatSpec with ShouldMatchersForJUnit {
       new {}, classOf[JMap[String,Int]]) should equal(map)
   }
 
-}
+  "Extension Function 'map'" should "throw SpelEvaluationException" +
+          "if length of key and values lists is not same " in {
+    evaluating { new SpelHelper().evalExpression("#map(#list('a','b','c'),#list(1,2))",
+      new {}, classOf[JMap[String,Int]]) } should produce [SpelEvaluationException]
+  }
+
+}

src/test/scala/net/abhinavsarkar/spelhelper/ImplicitMethodsSpec.scala

@@ -49,4 +49,4 @@ class ImplicitMethodsSpec extends FlatSpec with ShouldMatchersForJUnit {
       new {}, classOf[JList[String]]) should equal(list)
   }
   
-}
+}

src/test/scala/net/abhinavsarkar/spelhelper/SpelHelperSpec.scala

@@ -2,53 +2,102 @@ package net.abhinavsarkar.spelhelper
 
 import org.scalatest.junit.JUnitRunner
 import org.junit.runner.RunWith
-import org.scalatest.Spec
+import org.scalatest.FlatSpec
 import org.scalatest.junit.ShouldMatchersForJUnit
+import org.springframework.expression.spel.SpelEvaluationException
 
 @RunWith(classOf[JUnitRunner])
-class SpelHelperSpec extends Spec with ShouldMatchersForJUnit {
-  describe("SpelHelper") {
-
-    it ("should register and evaluate functions ") {
-      new SpelHelper()
-        .registerFunctionsFromClass(classOf[Functions])
-        .evalExpression(
-          "#test('check')", new {}, classOf[String]) should equal("check")
-    }
-
-    it ("should register implicit methods ") {
-      new SpelHelper()
-        .registerImplicitMethodsFromClass(classOf[Functions])
-        .lookupImplicitMethod("java.lang.String.test") should equal(
-          classOf[Functions].getMethod("test", classOf[String]))
-    }
-
-    it ("should register implicit constructors ") {
-      new SpelHelper()
-        .registerConstructorsFromClass(classOf[Functions])
-        .lookupImplicitConstructor("Functions[]") should equal(
-          classOf[Functions].getConstructor())
-    }
-
-    it ("should evaluate implicit methods ") {
-      new SpelHelper()
-        .registerImplicitMethodsFromClass(classOf[Functions])
-        .evalExpression(
-          "'check'.test()", new {}, classOf[String]) should equal("check")
-    }
-
-    it ("should evaluate implicit constructors ") {
-      new SpelHelper()
-        .registerConstructorsFromClass(classOf[Functions])
-        .evalExpression(
-          "new Functions()", new {}, classOf[Functions]) should equal(new Functions)
-    }
-
-    it ("should evaluate implicit properties ") {
-      new SpelHelper().evalExpression(
-        "'abc'.hashCode", new {}, classOf[int]) should equal("abc".hashCode) 
-    }
+class SpelHelperSpec extends FlatSpec with ShouldMatchersForJUnit {
 
+  "SpelHelper" should "register and evaluate functions " in {
+    new SpelHelper()
+      .registerFunctionsFromClass(classOf[Functions])
+      .evalExpression(
+        "#test('check')", new {}, classOf[String]) should equal ("check")
   }
-}
 
+  it should "not register non public methods " in {
+    val spelHelper = new SpelHelper()
+      .registerFunctionsFromClass(classOf[Functions])
+    evaluating { spelHelper.evalExpression("#testNonPublic('check')",
+      new {}, classOf[String]) } should produce [SpelEvaluationException]
+  }
+
+  it should "not register non static methods " in {
+    val spelHelper = new SpelHelper()
+      .registerFunctionsFromClass(classOf[Functions])
+    evaluating { spelHelper.evalExpression("#testNonStatic('check')",
+      new {}, classOf[String]) } should produce [SpelEvaluationException]
+  }
+
+  it should "not register void methods " in {
+    val spelHelper = new SpelHelper()
+      .registerFunctionsFromClass(classOf[Functions])
+    evaluating { spelHelper.evalExpression("#testVoid('check')",
+      new {}, classOf[String]) } should produce [SpelEvaluationException]
+  }
+
+  it should "register implicit methods " in {
+    new SpelHelper()
+      .registerImplicitMethodsFromClass(classOf[Functions])
+      .lookupImplicitMethod("java.lang.String.test") should equal(
+        classOf[Functions].getMethod("test", classOf[String]))
+  }
+
+  it should "not register methods with no args as implicit methods " in {
+    new SpelHelper()
+      .registerImplicitMethodsFromClass(classOf[Functions])
+      .lookupImplicitMethod("java.lang.String.testNoArg") should be (null);
+  }
+
+  it should "register implicit constructors " in {
+    new SpelHelper()
+      .registerConstructorsFromClass(classOf[Functions])
+      .lookupImplicitConstructor("Functions[]") should equal(
+        classOf[Functions].getConstructor())
+  }
+
+  it should "evaluate implicit methods " in {
+    new SpelHelper()
+      .registerImplicitMethodsFromClass(classOf[Functions])
+      .evalExpression(
+        "'check'.test()", new {}, classOf[String]) should equal ("check")
+  }
+
+  it should "evaluate implicit constructors " in {
+    new SpelHelper()
+      .registerConstructorsFromClass(classOf[Functions])
+      .evalExpression(
+        "new Functions()", new {}, classOf[Functions]) should equal (new Functions)
+  }
+
+  it should "evaluate implicit properties " in {
+    new SpelHelper().evalExpression(
+      "'abc'.hashCode", new {}, classOf[int]) should equal ("abc".hashCode)
+  }
+
+  it should "evaluate multiple expressions " in {
+    new SpelHelper().evalExpressions(
+      Array("#s='check'", "#s"), new {}, classOf[String]) should equal ("check")
+  }
+
+  it should "throw IllegalArgumentException when trying to evaluate " +
+          "blank multiple expressions " in {
+    evaluating { new SpelHelper().evalExpressions(
+      Array[String](), new {}, classOf[String]) } should produce [IllegalArgumentException]
+  }
+
+  it should "return evaluation context inside a method called " +
+          "from SpEL expression " in {
+    new SpelHelper()
+      .registerFunctionsFromClass(classOf[Functions])
+      .evalExpression(
+        "#testContext('check')", new {}, classOf[String]) should equal ("check")
+  }
+
+  it should "not return evaluation context outside a method called " +
+          "from SpEL expression " in {
+    SpelHelper.getCurrentContext should be (null)
+  }
+  
+}