Remove obsolete iterator tests

2015-10-13 03:14:38 +03:00
parent c58d21a1e7
commit 6d2f9cc669
4 changed files with 10 additions and 176 deletions
@@ -73,6 +73,11 @@ public class SequenceTest {
        }
    }

+    @test fun mapIndexed() {
+        assertEquals(listOf(0, 1, 2, 6, 12), fibonacci().mapIndexed { index, value -> index * value }.takeWhile { i: Int -> i < 20 }.toList())
+    }
+
+
    @test fun mapAndJoinToString() {
        assertEquals("3, 5, 8", fibonacci().withIndex().filter { it.index > 3 }.take(3).joinToString { it.value.toString() })
    }
@@ -126,6 +131,11 @@ public class SequenceTest {
        }
    }

+    @test fun zipPairs() {
+        val pairStr = (fibonacci() zip fibonacci().map { i -> i*2 }).joinToString(limit = 10)
+        assertEquals("(0, 0), (1, 2), (1, 2), (2, 4), (3, 6), (5, 10), (8, 16), (13, 26), (21, 42), (34, 68), ...", pairStr)
+    }
+
    @test fun toStringJoinsNoMoreThanTheFirstTenElements() {
        assertEquals("0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...", fibonacci().joinToString(limit = 10))
        assertEquals("13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ...", fibonacci().filter { it > 10 }.joinToString(limit = 10))
@@ -1,28 +0,0 @@
-package iterators
-
-import kotlin.*
-import kotlin.test.*
-
-import org.junit.Test
-
-class FunctionIteratorTest {
-
-    @Test
-    fun iterateOverFunction() {
-        var count = 3
-
-        val iter = sequence<Int> {
-            count--
-            if (count >= 0) count else null
-        }
-
-        val list = iter.toList()
-        assertEquals(arrayListOf(2, 1, 0), list)
-    }
-
-    @Test
-    fun iterateOverFunction2() {
-        val values = sequence<Int>(3) { n -> if (n > 0) n - 1 else null }
-        assertEquals(arrayListOf(3, 2, 1, 0), values.toList())
-    }
-}
@@ -1,32 +0,0 @@
-package iterators
-
-import kotlin.test.assertEquals
-import org.junit.Test as test
-
-class IteratorsJVMTest {
-
-
-    @test fun flatMapAndTakeExtractTheTransformedElements() {
-        fun intToBinaryDigits() = { i: Int ->
-            val binary = Integer.toBinaryString(i)!!
-            var index = 0
-            sequence<Char> { if (index < binary.length()) binary.get(index++) else null }
-        }
-
-        val expected = arrayListOf(
-                      '0', // fibonacci(0) = 0
-                      '1', // fibonacci(1) = 1
-                      '1', // fibonacci(2) = 1
-                 '1', '0', // fibonacci(3) = 2
-                 '1', '1', // fibonacci(4) = 3
-            '1', '0', '1'  // fibonacci(5) = 5
-        )
-
-        assertEquals(expected, fibonacci().flatMap<Int, Char>(intToBinaryDigits()).take(10).toList())
-    }
-
-    @test fun flatMapOnIterator() {
-        val result = sequenceOf(1, 2).flatMap { i -> (0..i).asSequence()}
-        assertEquals(listOf(0, 1, 0, 1, 2), result.toList())
-    }
-}
@@ -1,116 +0,0 @@
-package iterators
-
-import kotlin.test.assertEquals
-import org.junit.Test as test
-import java.util.ArrayList
-import kotlin.test.assertFails
-
-fun fibonacci(): Sequence<Int> {
-    // fibonacci terms
-    var index = 0; var a = 0; var b = 1
-    return sequence<Int> { when (index++) { 0 -> a; 1 -> b; else -> { val result = a + b; a = b; b = result; result } } }
-}
-
-class IteratorsTest {
-
-    @test fun filterAndTakeWhileExtractTheElementsWithinRange() {
-        assertEquals(arrayListOf(144, 233, 377, 610, 987), fibonacci().filter { it > 100 }.takeWhile { it < 1000 }.toList())
-    }
-
-    @test fun foldReducesTheFirstNElements() {
-        val sum = { a: Int, b: Int -> a + b }
-        assertEquals(arrayListOf(13, 21, 34, 55, 89).fold(0, sum), fibonacci().filter { it > 10 }.take(5).fold(0, sum))
-    }
-
-    @test fun takeExtractsTheFirstNElements() {
-        assertEquals(arrayListOf(0, 1, 1, 2, 3, 5, 8, 13, 21, 34), fibonacci().take(10).toList())
-    }
-
-    @test fun mapAndTakeWhileExtractTheTransformedElements() {
-        assertEquals(arrayListOf(0, 3, 3, 6, 9, 15), fibonacci().map { it * 3 }.takeWhile { i: Int -> i < 20 }.toList())
-    }
-
-    @test fun mapIndexed() {
-        assertEquals(arrayListOf(0, 1, 2, 6, 12), fibonacci().mapIndexed { index, value -> index * value }.takeWhile { i: Int -> i < 20 }.toList())
-    }
-
-    @test fun joinConcatenatesTheFirstNElementsAboveAThreshold() {
-        assertEquals("13, 21, 34, 55, 89, ...", fibonacci().filter { it > 10 }.joinToString(separator = ", ", limit = 5))
-    }
-
-    @test fun plus() {
-        val iter = arrayListOf("foo", "bar").asSequence()
-        val iter2 = iter + "cheese"
-        assertEquals(arrayListOf("foo", "bar", "cheese"), iter2.toList())
-
-        // lets use a mutable variable
-        var mi  = sequenceOf("a", "b")
-        mi += "c"
-        assertEquals(arrayListOf("a", "b", "c"), mi.toList())
-    }
-
-    @test fun plusCollection() {
-        val a = arrayListOf("foo", "bar")
-        val b = arrayListOf("cheese", "wine")
-        val iter = a.asSequence() + b.asSequence()
-        assertEquals(arrayListOf("foo", "bar", "cheese", "wine"), iter.toList())
-
-        // lets use a mutable variable
-        var ml = arrayListOf("a").asSequence()
-        ml += a.asSequence()
-        ml += "beer"
-        ml += b
-        ml += "z"
-        assertEquals(arrayListOf("a", "foo", "bar", "beer", "cheese", "wine", "z"), ml.toList())
-    }
-
-    @test fun requireNoNulls() {
-        val iter = arrayListOf<String?>("foo", "bar").asSequence()
-        val notNull = iter.requireNoNulls()
-        assertEquals(arrayListOf("foo", "bar"), notNull.toList())
-
-        val iterWithNulls = arrayListOf("foo", null, "bar").asSequence()
-        val notNull2 = iterWithNulls.requireNoNulls()
-        assertFails {
-            // should throw an exception as we have a null
-            notNull2.toList()
-        }
-    }
-
-    @test fun toStringJoinsNoMoreThanTheFirstTenElements() {
-        assertEquals("0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...", fibonacci().joinToString(limit = 10))
-        assertEquals("13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ...", fibonacci().filter {  it > 10 }.joinToString(limit = 10))
-        assertEquals("144, 233, 377, 610, 987", fibonacci().filter { it > 100 }.takeWhile { it < 1000 }.joinToString())
-    }
-
-    @test fun pairIterator() {
-        val pairStr = (fibonacci() zip fibonacci().map { i -> i*2 }).joinToString(limit = 10)
-        assertEquals("(0, 0), (1, 2), (1, 2), (2, 4), (3, 6), (5, 10), (8, 16), (13, 26), (21, 42), (34, 68), ...", pairStr)
-    }
-
-    @test fun skippingIterator() {
-        assertEquals("13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ...", fibonacci().drop(7).joinToString(limit = 10))
-        assertEquals("13, 21, 34, 55, 89, 144, 233, 377, 610, 987, ...", fibonacci().drop(3).drop(4).joinToString(limit = 10))
-    }
-
-    @test fun iterationOverIterator() {
-        val c = arrayListOf(0, 1, 2, 3, 4, 5)
-        var s = ""
-        for (i in c.iterator()) {
-            s = s + i.toString()
-        }
-        assertEquals("012345", s)
-    }
-
-    private fun <T, C : MutableCollection<in T>> Iterator<T>.takeWhileTo(result: C, predicate: (T) -> Boolean): C {
-        for (element in this) if (predicate(element)) result.add(element) else break
-        return result
-    }
-
-    @test fun iterableExtension() {
-        val c = arrayListOf(0, 1, 2, 3, 4, 5)
-        val d = ArrayList<Int>()
-        c.iterator().takeWhileTo(d, {i -> i < 4 })
-        assertEquals(4, d.size())
-    }
-}