1 files changed, 51 insertions, 0 deletions
diff --git a/tests/system/tcomparisons.nim b/tests/system/tcomparisons.nim
new file mode 100644
index 000000000..a661b14a1
--- /dev/null
+++ b/tests/system/tcomparisons.nim
@@ -0,0 +1,51 @@
+discard """
+  targets: "c cpp js"
+"""
+
+template main =
+  block: # proc equality
+    var prc: proc(): int {.closure.}
+    prc = nil
+    doAssert prc == nil
+    doAssert prc.isNil
+    prc = proc(): int =
+      result = 123
+    doAssert prc != nil
+    doAssert not prc.isNil
+    doAssert prc == prc
+    let prc2 = prc
+    doAssert prc == prc2
+    doAssert prc2 != nil
+    doAssert not prc2.isNil
+    doAssert not prc.isNil
+    prc = proc(): int =
+      result = 456
+    doAssert prc != nil
+    doAssert not prc.isNil
+    doAssert prc != prc2
+  block: # iterator equality
+    when nimvm: discard # vm does not support closure iterators
+    else:
+      when not defined(js): # js also does not support closure iterators
+        var iter: iterator(): int {.closure.}
+        iter = nil
+        doAssert iter == nil
+        doAssert iter.isNil
+        iter = iterator(): int =
+          yield 123
+        doAssert iter != nil
+        doAssert not iter.isNil
+        doAssert iter == iter
+        let iter2 = iter
+        doAssert iter == iter2
+        doAssert iter2 != nil
+        doAssert not iter2.isNil
+        doAssert not iter.isNil
+        iter = iterator(): int =
+          yield 456
+        doAssert iter != nil
+        doAssert not iter.isNil
+        doAssert iter != iter2
+
+static: main()
+main()