[example] assert on output tested against cpp code

Author: proyan

example/cppadcg_c_codegen.py

@@ -42,4 +42,8 @@
 langC = LanguageC("double", 3)
 nameGen = LangCDefaultVariableNameGenerator("y","x","v","array","sarray")
 code = handler.generateCode(langC, jac, nameGen, "source")
+output = code.splitlines()
+assert(output[0]=='   y[1] = 0.5 * x[1] + 0.5 * x[1];')
+assert(output[1]=='   // dependent variables without operations')
+assert(output[2]=='   y[0] = 0.5;')
 print(code)