1 files changed, 58 insertions, 0 deletions
diff --git a/tests/vm/tconst.nim b/tests/vm/tconst.nim
new file mode 100644
index 000000000..5cfe7533e
--- /dev/null
+++ b/tests/vm/tconst.nim
@@ -0,0 +1,58 @@
+discard """
+  targets: "c cpp js"
+"""
+
+import std/strutils
+
+template forceConst(a: untyped): untyped =
+  ## Force evaluation at CT, but `static(a)` is simpler
+  const ret = a
+  ret
+
+proc isNimVm(): bool =
+  when nimvm: result = true
+  else: result = false
+
+block:
+  doAssert forceConst(isNimVm())
+  doAssert not isNimVm()
+  doAssert forceConst(isNimVm()) == static(isNimVm())
+  doAssert forceConst(isNimVm()) == isNimVm().static
+
+template main() =
+  # xxx merge more const related tests here
+  const ct = CompileTime
+    # refs https://github.com/timotheecour/Nim/issues/718, apparently `CompileTime`
+    # isn't cached, which seems surprising.
+  block:
+    const
+      a = """
+    Version $1|
+    Compiled at: $2, $3
+    """ % [NimVersion & spaces(44-len(NimVersion)), CompileDate, ct]
+    let b = $a
+    doAssert ct in b, $(b, ct)
+    doAssert NimVersion in b
+
+  block: # Test for fix on broken const unpacking
+    template mytemp() =
+      const
+        (x, increment) = (4, true)
+        a = 100
+      discard (x, increment, a)
+    mytemp()
+
+  block: # bug #12334
+    block:
+      const b: cstring = "foo"
+      var c = b
+      doAssert c == "foo"
+    block:
+      const a = "foo"
+      const b: cstring = a
+      var c = b
+      doAssert c == "foo"
+
+
+static: main()
+main()