vm unit tests

vm_test/arrow_block.txt

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+var f = x => { return x }; f(1)

vm_test/arrow_expr.txt

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+var f = x => x * 2; f(5)

vm_test/arrow_multi.txt

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+var f = (a, b) => a + b; f(2, 3)

vm_test/closure_basic.txt

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+var f = function(x) { return function() { return x } }; f(5)()

vm_test/closure_mutate.txt

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+var counter = function() {
+  var n = 0
+  return function() {
+    n = n + 1
+    return n
+  }
+}
+var c = counter()
+c()
+c()
+c()

vm_test/def_basic.txt

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+def x = 5; x

vm_test/for_basic.txt

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+var s = 0; for (var i = 0; i < 3; i++) s = s + i; s

vm_test/go_basic.txt

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+function a() { go b() }
+function b() { 1 }

vm_test/go_method.txt

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+var o = {m: function() { 1 }}
+function f() { go o.m() }

vm_test/if_basic.txt

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+var x = 0; if (true) x = 1; x

vm_test/if_else.txt

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+if (false) 1 else 2

vm_test/op_arith.txt

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+1 + 2 * 3

vm_test/op_bitwise.txt

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+5 & 3

vm_test/op_compare.txt

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+5 > 3

vm_test/op_logical.txt

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+true && false

vm_test/op_ternary.txt

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+true ? 1 : 2

vm_test/record_bracket.txt

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+var a = {x: 1}; a["x"]

vm_test/record_computed.txt

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+var k = "x"; var a = {x: 1}; a[k]

vm_test/record_dot.txt

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+var a = {x: 1}; a.x

vm_test/record_object_key.txt

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+var k = {}; var a = {}; a[k] = 1; a[k]

vm_test/record_this.txt

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+var o = {v: 1, f: function() { return this.v }}; o.f()

vm_test/regex_flags.txt

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+/hello/i

vm_test/regex_literal.txt

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+/hello/

vm_test/shorthand_method.txt

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+{double(x) { return x + x }}

vm_test/shorthand_prop.txt

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+var x = 1; var y = 2; {x, y}

vm_test/switch_basic.txt

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+var r; switch(2) { case 1: r = 1; break; case 2: r = 2; break }; r

vm_test/template_basic.txt

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+var x = 5; `value: ${x}`

vm_test/try_catch.txt

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+try { 1 } catch(e) { 2 }

vm_test/try_throw.txt

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+try { throw "err" } catch(e) { e }

vm_test/var_basic.txt

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+var x = 5; x

vm_test/var_block.txt

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+var x = 1; { var x = 2 }; x

vm_test/var_reassign.txt

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+var x = 5; x = 10; x

vm_test/while_basic.txt

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+var i = 0; while (i < 3) i = i + 1; i