Merge to XFA: First JavaScript testing implementation.

testing/resources/javascript/app_alert.pdf

Index: testing/resources/javascript/app_alert.pdf
diff --git a/testing/resources/javascript/app_alert.pdf b/testing/resources/javascript/app_alert.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..091992cbd7e015f331e40712ce0551ae96f608ad
--- /dev/null
+++ b/testing/resources/javascript/app_alert.pdf
@@ -0,0 +1,60 @@
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