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@@ -18,17 +18,28 @@ test('list function', t => {
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})
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test('length function', t => {
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- t.plan(2)
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+ t.plan(1)
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- let tree = helpers.evaluate('(length (list 1 2 3))')
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+ const tree = helpers.evaluate('(length (list 1 2 3))')
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t.deepEqual(tree[0], new AST.Number({ value: 3 }))
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+})
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+
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+test('map', t => {
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+ t.plan(1)
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+ const tree = helpers.evaluate(`
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+ (define my-map
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+ (lambda (f xs)
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+ (if (= (length xs) 0)
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+ (list)
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+ (cons
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+ (f (head xs))
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+ (my-map f (tail xs))))))
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- tree = helpers.evaluate('(length 5)')
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- t.deepEqual(
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- tree,
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- new OsloError({
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- line: 1,
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- message: 'length: argument is not a list'
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- })
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- )
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+ (my-map (lambda (x) (+ x 1)) (list 1 2 3))
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+ `)
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+ t.deepEqual(tree[0], new AST.List({ elements: [
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+ new AST.Number({ value: 2 }),
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+ new AST.Number({ value: 3 }),
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+ new AST.Number({ value: 4 }),
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+ ]}))
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})
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