Update make regen to work with new directory.

Also add test to make sure that `make regen` continues to work.

.travis.yml

@@ -23,7 +23,9 @@ matrix:
       dist: trusty
       env: TEST_RUNNER=make VERBOSE=2
       sudo: false
-      script: make test
+      script:
+        - make test
+        - make regen-test
 
     - os: linux
       dist: trusty
@@ -83,7 +85,9 @@ matrix:
     - os: osx
       env: TEST_RUNNER=make VERBOSE=2
       sudo: false
-      script: make test
+      script:
+        - make test
+        - make regen-test
 
     - os: osx
       env: TEST_RUNNER=bazel

Makefile

@@ -22,3 +22,7 @@ test:
 
 regen:
 	$(VERB) bash gen_test_results.sh
+
+regen-test:
+	$(VERB) $(MAKE) regen
+	$(VERB) $(MAKE) test

gen_test_results.sh

@@ -23,7 +23,7 @@
 function gen_test_data() {
   local files="$@"
   if [[ -z "${files}" ]]; then
-    files=testdata/*.in
+    files=tests/testdata/*.in
   fi
 
   for input in ${files}; do