Use test_run_dir for more tests. (freechipsproject#117)

Author: ucbjrl

src/test/scala/examples/Adder.scala

@@ -105,13 +105,13 @@ class SignedAdderTester(c: SignedAdder) extends PeekPokeTester(c) {
 
 class SignedAdderSpec extends FreeSpec with Matchers {
   "tester should returned signed values with interpreter" in {
-    iotesters.Driver.execute(Array("--backend-name", "firrtl"), () => new SignedAdder(16)) { c =>
+    iotesters.Driver.execute(Array("--backend-name", "firrtl", "--target-dir", "test_run_dir"), () => new SignedAdder(16)) { c =>
       new SignedAdderTester(c)
     } should be (true)
   }
 
   "tester should returned signed values with verilator" in {
-    iotesters.Driver.execute(Array("--backend-name", "verilator"), () => new SignedAdder(16)) { c =>
+    iotesters.Driver.execute(Array("--backend-name", "verilator", "--target-dir", "test_run_dir"), () => new SignedAdder(16)) { c =>
       new SignedAdderTester(c)
     } should be (true)
   }
@@ -146,14 +146,14 @@ class FixedPointAdderTester(c: FixedPointAdder) extends PeekPokeTester(c) {
 
 class FixedPointAdderSpec extends FreeSpec with Matchers {
   "tester should returned signed values with interpreter" in {
-    iotesters.Driver.execute(Array("--backend-name", "firrtl"), () => new FixedPointAdder(16)) { c =>
+    iotesters.Driver.execute(Array("--backend-name", "firrtl", "--target-dir", "test_run_dir"), () => new FixedPointAdder(16)) { c =>
       new FixedPointAdderTester(c)
     } should be (true)
   }
 
   //TODO: make this work
   "tester should returned signed values" ignore {
-    iotesters.Driver.execute(Array("--backend-name", "verilator"), () => new FixedPointAdder(16)) { c =>
+    iotesters.Driver.execute(Array("--backend-name", "verilator", "--target-dir", "test_run_dir"), () => new FixedPointAdder(16)) { c =>
       new FixedPointAdderTester(c)
     } should be (true)
   }