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wren/test/and.wren
2013-11-19 18:24:58 -08:00

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// Note: These tests implicitly depend on ints being truthy.
// Also rely on io.write() returning its argument.
// Return the first non-true argument.
io.write(false && 1) // expect: false
io.write(true && 1) // expect: 1
io.write(1 && 2 && false) // expect: false
// Return the last argument if all are true.
io.write(1 && true) // expect: true
io.write(1 && 2 && 3) // expect: 3
// Short-circuit at the first false argument.
io.write(true) && // expect: true
io.write(false) && // expect: false
io.write(false) // should not print
// Swallow a trailing newline.
io.write(true &&
true) // expect: true
// Only false is falsy.
io.write(0 && true) // expect: true
io.write(null && true) // expect: true
io.write("" && true) // expect: true
io.write(false && true) // expect: false