1 files changed, 47 insertions, 0 deletions

diff --git a/spec/inputs/test/using_spec.yue b/spec/inputs/test/using_spec.yue
new file mode 100644
index 0000000..e9ad749
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+++ b/spec/inputs/test/using_spec.yue
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+describe "using", ->
+        it "should prevent variable shadowing in assignment", ->
+                tmp = 100
+                i, k = 100, 50
+
+                process = (add using k, i) ->
+                        tmp = tmp + add
+                        i += tmp
+                        k += tmp
+
+                process 22
+                assert.same i, 222
+                assert.same k, 172
+                assert.same tmp, 100
+
+        it "should handle multiple variable names", ->
+                a, b, c = 1, 2, 3
+
+                process = (sum using a, b) ->
+                        a += 1
+                        b += 2
+                        c = sum + 100
+
+                process 10
+                assert.same a, 2
+                assert.same b, 4
+                assert.same c, 3
+
+        it "should work with nil value", ->
+                local x = 1
+
+                fn = (val using x) ->
+                        if val ~= nil
+                                x = val
+
+                fn 100
+                assert.same x, 100
+                assert.is_true x ~= 1
+
+        it "should work with function calls", ->
+                local count = 0
+
+                fn = (n using count) ->
+                        count += n
+
+                fn 5
+                assert.same count, 5