Implemented support for `in` and `not in` operators.

2 files changed, 26 insertions, 0 deletions

diff --git a/tests/basics/run-tests b/tests/basics/run-tests
index 0c3995da15..bc2969ae3d 100755
--- a/tests/basics/run-tests
+++ b/tests/basics/run-tests
@@ -42,4 +42,7 @@ echo "$numpassed tests passed"
 if [[ $numfailed != 0 ]]
 then
     echo "$numfailed tests failed -$namefailed"
+    exit 1
+else
+    exit 0
 fi
diff --git a/tests/basics/tests/containment.py b/tests/basics/tests/containment.py
new file mode 100644
index 0000000000..84d40b4e8f
--- /dev/null
+++ b/tests/basics/tests/containment.py
@@ -0,0 +1,23 @@
+for i in 1, 2:
+    for o in {1:2}, {1}, {1:2}.keys():
+        print("{} in {}: {}".format(i, o, i in o))
+        print("{} not in {}: {}".format(i, o, i not in o))
+
+haystack = "supercalifragilistc"
+for needle in (haystack[i:] for i in range(len(haystack))):
+    print(needle, "in", haystack, "::", needle in haystack)
+    print(needle, "not in", haystack, "::", needle not in haystack)
+    print(haystack, "in", needle, "::", haystack in needle)
+    print(haystack, "not in", needle, "::", haystack not in needle)
+for needle in (haystack[:i+1] for i in range(len(haystack))):
+    print(needle, "in", haystack, "::", needle in haystack)
+    print(needle, "not in", haystack, "::", needle not in haystack)
+    print(haystack, "in", needle, "::", haystack in needle)
+    print(haystack, "not in", needle, "::", haystack not in needle)
+
+# until here, the tests would work without the 'second attempt' iteration thing.
+
+for i in 1, 2:
+    for o in [], [1], [1, 2]:
+        print("{} in {}: {}".format(i, o, i in o))
+        print("{} not in {}: {}".format(i, o, i not in o))