Optimize trivial cases of CharSequence.repeat. Provide CharSequence.repeat for JS.

#KT-3064 Fixed
2016-02-21 06:43:56 +03:00
parent 7a43d62408
commit f564adfdd4
4 changed files with 51 additions and 17 deletions
@@ -334,6 +334,19 @@ class StringTest {
        assertEquals("xxx", s.replaceBeforeLast("=", "/new/path", "xxx"))
    }

+    @test fun repeat() = withOneCharSequenceArg { arg1 ->
+        fun String.repeat(n: Int): String = arg1(this).repeat(n)
+
+        assertFails { "foo".repeat(-1) }
+        assertEquals("", "foo".repeat(0))
+        assertEquals("foo", "foo".repeat(1))
+        assertEquals("foofoo", "foo".repeat(2))
+        assertEquals("foofoofoo", "foo".repeat(3))
+
+        assertEquals("", "".repeat(Int.MAX_VALUE))
+        assertEquals("aaaaaaaaaaaaa", "a".repeat(13))
+    }
+
    @test fun stringIterator() = withOneCharSequenceArg("239") { data ->
        var sum = 0
        for(c in data)