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-rw-r--r--spec/util_array_spec.lua19
1 files changed, 19 insertions, 0 deletions
diff --git a/spec/util_array_spec.lua b/spec/util_array_spec.lua
index 1d9da947..ff049d0e 100644
--- a/spec/util_array_spec.lua
+++ b/spec/util_array_spec.lua
@@ -148,6 +148,25 @@ describe("util.array", function ()
end);
end);
+ describe("slice", function ()
+ it("works", function ()
+ local a = array({ "a", "b", "c" });
+ assert.equal(array.slice(a, 1, 2), array{ "a", "b" });
+ assert.equal(array.slice(a, 1, 3), array{ "a", "b", "c" });
+ assert.equal(array.slice(a, 2, 3), array{ "b", "c" });
+ assert.equal(array.slice(a, 2), array{ "b", "c" });
+ assert.equal(array.slice(a, -4), array{ "a", "b", "c" });
+ assert.equal(array.slice(a, -3), array{ "a", "b", "c" });
+ assert.equal(array.slice(a, -2), array{ "b", "c" });
+ assert.equal(array.slice(a, -1), array{ "c" });
+ end);
+
+ it("can mutate", function ()
+ local a = array({ "a", "b", "c" });
+ assert.equal(a:slice(-1), array{"c"});
+ assert.equal(a, array{"c"});
+ end);
+ end);
end);
-- TODO The various array.foo(array ina, array outa) functions