Add the non-working expressions test to YS2.

Author: weaversam8

examples/yarn2/expressions-metadata.csv

@@ -0,0 +1 @@
+id,node,lineNumber,tags

examples/yarn2/expressions.csv

@@ -0,0 +1,2 @@
+id,text,file,node,lineNumber
+line:/Users/sweaver/Git/YarnRunner-Python/examples/yarn2/expressions.yarn-Start-0,Hello there {0}.,/Users/sweaver/Git/YarnRunner-Python/examples/yarn2/expressions.yarn,Start,5

examples/yarn2/expressions.yarn

@@ -0,0 +1,6 @@
+title: Start
+---
+<<set $name to "Sam">>
+
+Hello there {$name}.
+===

examples/yarn2/expressions.yarnc

@@ -1,19 +1,36 @@
 import os
 from .context import YarnRunner
 
-compiled_yarn_f = open(os.path.join(os.path.dirname(
+compiled_yarn_f1 = open(os.path.join(os.path.dirname(
     __file__), '../examples/yarn1/expressions.yarnc'), 'rb')
-names_csv_f = open(os.path.join(os.path.dirname(
+names_csv_f1 = open(os.path.join(os.path.dirname(
     __file__), '../examples/yarn1/expressions.csv'), 'r')
+compiled_yarn_f2 = open(os.path.join(os.path.dirname(
+    __file__), '../examples/yarn2/expressions.yarnc'), 'rb')
+names_csv_f2 = open(os.path.join(os.path.dirname(
+    __file__), '../examples/yarn2/expressions.csv'), 'r')
 
-runner = YarnRunner(compiled_yarn_f, names_csv_f, autostart=False)
+runner1 = YarnRunner(compiled_yarn_f1, names_csv_f1, autostart=False)
+runner2 = YarnRunner(compiled_yarn_f2, names_csv_f2, autostart=False)
 
 # TODO: implement a test for expression parsing
 
 
-def test_expressions():
+def test_expressions1():
     try:
-        runner.resume()
+        runner1.resume()
+
+        # the runner should throw an error
+        raise Exception(
+            "The runner ran without any issues. This test should fail. An Exception was expected.")
+    except Exception as e:
+        assert str(
+            e) == "Yarn stories with interpolated inline expressions are not yet supported."
+
+
+def test_expressions2():
+    try:
+        runner2.resume()
 
         # the runner should throw an error
         raise Exception(