tests: Regression test for evaluating call arguments before context s…

…witch

tests/call_arg_eval_context.fl

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+# Regression test.
+# When calling a function that is defined in a different source file, the context's source could be switched to the source file of the function being called before the argument expressions are evaluated.
+# This would cause these evaluations to use the wrong source file.
+
+# TODO rename this
+
+import .tests.call_arg_eval_context_helper
+
+assert function("zonnebloemgranen") == "zonnebloemgranen"

tests/call_arg_eval_context_helper.fl

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+fn function(x) {
+	return x
+}