Stanislav Erokhin
40 lines
1.1 KiB
Kotlin
40 lines
1.1 KiB
Kotlin
package foo
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class A(val value: Int) : Comparable<A> {
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override public fun compareTo(other: A): Int = other.value compareTo value
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}
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class B(val value: Int)
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fun testExtensionFunctionAsCompareTo() {
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val compareTo: B.( B ) -> Int = { other -> other.value compareTo this.value }
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val x: B = B(100)
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val y: B = B(200)
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assertEquals(false, x < y, "ext fun: x < y")
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assertEquals(true, x > y, "ext fun: x > y")
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assertEquals(1, x compareTo y, "ext fun: x compareTo y")
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}
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fun testMethodAsCompareTo() {
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val x: A = A(100)
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val y: A = A(200)
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assertEquals(false, x < y, "meth: x < y")
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assertEquals(true, x > y, "meth: x > y")
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assertEquals(1, x compareTo y, "meth: x compareTo y")
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assertEquals(false, (x: Comparable<A>) < y, "meth: (x: Comparable<A>) < y")
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assertEquals(true, (x: Comparable<A>) > y, "meth: (x: Comparable<A>) > y")
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assertEquals(1, (x: Comparable<A>) compareTo y, "meth: (x: Comparable<A>) compareTo y")
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}
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fun box(): String {
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testExtensionFunctionAsCompareTo()
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testMethodAsCompareTo()
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return "OK"
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} |