53 lines
950 B
V
53 lines
950 B
V
import datatypes as dt
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fn test_is_empty() {
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mut stack := dt.Stack<int>{}
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assert stack.is_empty() == true
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stack.push(1)
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assert stack.is_empty() == false
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}
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fn test_len() ? {
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mut stack := dt.Stack<int>{}
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assert stack.len() == 0
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stack.push(1)
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assert stack.len() == 1
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stack.pop()?
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assert stack.len() == 0
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}
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fn test_peek() ? {
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mut stack := dt.Stack<int>{}
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stack.push(1)
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assert stack.peek()? == 1
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stack.push(2)
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assert stack.peek()? == 2
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stack = dt.Stack<int>{}
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stack.peek() or { return }
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assert false
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}
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fn test_push() ? {
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mut stack := dt.Stack<int>{}
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stack.push(1)
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assert stack.peek()? == 1
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stack.push(2)
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assert stack.peek()? == 2
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stack.push(3)
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assert stack.peek()? == 3
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}
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fn test_pop() ? {
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mut stack := dt.Stack<int>{}
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stack.push(1)
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stack.push(2)
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stack.push(3)
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assert stack.pop()? == 3
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stack.push(4)
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assert stack.pop()? == 4
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assert stack.pop()? == 2
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stack = dt.Stack<int>{}
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stack.pop() or { return }
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assert false
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}
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