Add tests for ARGV.

Author: python-processing-unit

tests/cases/failing/argv-arity-one.pre

@@ -0,0 +1 @@
+ARGV("extra")

tests/cases/passing/argv-elements-str.pre

@@ -0,0 +1,5 @@
+TNS: args = ARGV()
+
+FOR(i, TLEN(args, 0d1)){
+    ASSERT(ISSTR(args[i]))
+}

tests/cases/passing/argv-order-program-arg-last.pre

@@ -0,0 +1,4 @@
+! ARGV_LAST_ARG_SELF_FILE_MARKER
+STR: source = REPLACE(READFILE(ARGV()[-0d1]), "\r", "")
+
+ASSERT(IN("! ARGV_LAST_ARG_SELF_FILE_MARKER", SPLIT(source, "\n")))

tests/cases/passing/argv-rank-1.pre

@@ -0,0 +1,2 @@
+ASSERT(EQ(TYPE(SHAPE(ARGV())), "TNS"))
+ASSERT(EQ(TLEN(SHAPE(ARGV()), 0d1), 0d1))

tests/cases/passing/argv-return-type.pre

@@ -0,0 +1 @@
+ASSERT(EQ(TYPE(ARGV()), "TNS"))