Add tests cases for the partial application

examples/partial_application.dry

@@ -0,0 +1,16 @@
+let sum = lambda(x, y) { return x + y };
+let onePlus = sum(1, _);
+
+assert_equal("Supply first function arg only", onePlus(3), 4);
+assert_equal("Supply second function arg only", sum(_, 3)(7), 10);
+
+class HasMinus {
+    def minus(x, y) {
+        return x - y;
+    }
+}
+
+let tenMinus = HasMinus().minus(10, _);
+
+assert_equal("Supply first method arg only", tenMinus(6), 4);
+assert_equal("Supply second method arg only", HasMinus().minus(_, 4)(15), 11);

src/main/scala/com/melvic/dry/parsers/ExprParser.scala

@@ -11,6 +11,7 @@ import com.melvic.dry.result.Failure.ParseError
 
 import scala.annotation.nowarn
 
+//noinspection ScalaWeakerAccess
 private[parsers] trait ExprParser { _: Parser =>
   def expression: ParseResult[Expr] =
     assignment

src/main/scala/com/melvic/dry/parsers/StmtParser.scala

@@ -9,6 +9,7 @@ import com.melvic.dry.ast.Stmt.Loop.While
 import com.melvic.dry.ast.Stmt.{BlockStmt, ExprStmt, Import, ReturnStmt}
 import com.melvic.dry.ast.{Decl, Expr, Stmt}
 
+//noinspection ScalaWeakerAccess
 private[parsers] trait StmtParser { _: Parser with DeclParser =>
   def statement: ParseResult[Stmt] =
     select(

tests/test_calls.dry

@@ -1,9 +1,23 @@
-def test_partial_application() {
+def test_function_partial_application() {
     let sum = lambda(x, y) { return x + y };
     let onePlus = sum(1, _);
 
-    assert_equal("Supply first param only", onePlus(3), 4);
-    assert_equal("Supply second param only", sum(_, 3)(7), 10);
+    assert_equal("Supply first function arg only", onePlus(3), 4);
+    assert_equal("Supply second function arg only", sum(_, 3)(7), 10);
 }
 
-test_partial_application();
+def test_method_partial_application() {
+    class HasMinus {
+        def minus(x, y) {
+            return x - y;
+        }
+    }
+
+    let tenMinus = HasMinus().minus(10, _);
+
+    assert_equal("Supply first method arg only", tenMinus(6), 4);
+    assert_equal("Supply second method arg only", HasMinus().minus(_, 4)(15), 11);
+}
+
+test_function_partial_application();
+test_method_partial_application();