Add some simple tests on HashPMap

compiler/testData/codegen/boxWithStdlib/hashPMap/empty.kt

@@ -0,0 +1,22 @@
+import kotlin.reflect.jvm.internal.pcollections.HashPMap
+import kotlin.test.*
+
+fun box(): String {
+    val map = HashPMap.empty<String, Any>()!!
+
+    assertEquals(0, map.size())
+
+    assertFalse(map.containsKey(""))
+    assertFalse(map.containsKey("abacaba"))
+    assertEquals(null, map[""])
+    assertEquals(null, map["lol"])
+
+    // Check that doesn't create a new map
+    assertEquals(map, map.minus(""))
+
+    // Check that all empty()s are equal
+    val other = HashPMap.empty<String, Any>()!!
+    assertEquals(map, other)
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/hashPMap/manyNumbers.kt

@@ -0,0 +1,47 @@
+import java.util.*
+import kotlin.reflect.jvm.internal.pcollections.HashPMap
+import kotlin.test.*
+
+fun digitSum(number: Int): Int {
+    var x = number
+    var ans = 0
+    while (x != 0) {
+        ans += x % 10
+        x /= 10
+    }
+    return ans
+}
+
+val N = 1000000
+
+fun box(): String {
+    var map = HashPMap.empty<Int, Any>()!!
+
+    for (x in 1..N) {
+        map = map.plus(x, digitSum(x))!!
+    }
+
+    assertEquals(N, map.size())
+    
+    // Check in reverse order just in case
+    for (x in N downTo 1) {
+        assertTrue(map.containsKey(x), "Not found: $x")
+        assertEquals(digitSum(x), map[x], "Incorrect value for $x")
+    }
+
+    // Delete in random order
+    val list = (1..N).toCollection(ArrayList<Int>())
+    Collections.shuffle(list, Random(42))
+    for (x in list) {
+        map = map.minus(x)!!
+    }
+
+    assertEquals(0, map.size())
+
+    for (x in 1..N) {
+        assertFalse(map.containsKey(x), "Incorrectly found: $x")
+        assertEquals(null, map[x], "Incorrectly found value for $x")
+    }
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/hashPMap/rewriteWithDifferent.kt

@@ -0,0 +1,28 @@
+import kotlin.reflect.jvm.internal.pcollections.HashPMap
+import kotlin.test.*
+
+fun box(): String {
+    var map = HashPMap.empty<String, Any>()!!
+
+    map = map.plus("lol", 42)!!
+    map = map.plus("lol", 239)!!
+
+    assertEquals(1, map.size())
+    assertTrue(map.containsKey("lol"))
+    assertFalse(map.containsKey(""))
+    assertEquals(239, map["lol"])
+    assertEquals(null, map[""])
+
+    map = map.plus("", 0)!!
+    map = map.plus("", 2.71828)!!
+    map = map.plus("lol", 42)!!
+    map = map.plus("", 3.14)!!
+
+    assertEquals(2, map.size())
+    assertTrue(map.containsKey("lol"))
+    assertTrue(map.containsKey(""))
+    assertEquals(42, map["lol"])
+    assertEquals(3.14, map[""])
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/hashPMap/rewriteWithEqual.kt

@@ -0,0 +1,28 @@
+import kotlin.reflect.jvm.internal.pcollections.HashPMap
+import kotlin.test.*
+
+fun box(): String {
+    var map = HashPMap.empty<String, Any>()!!
+
+    map = map.plus("lol", 42)!!
+    map = map.plus("lol", 42)!!
+
+    assertEquals(1, map.size())
+    assertTrue(map.containsKey("lol"))
+    assertFalse(map.containsKey(""))
+    assertEquals(42, map["lol"])
+    assertEquals(null, map[""])
+
+    map = map.plus("", 0)!!
+    map = map.plus("", 0)!!
+    map = map.plus("lol", 42)!!
+    map = map.plus("", 0)!!
+
+    assertEquals(2, map.size())
+    assertTrue(map.containsKey("lol"))
+    assertTrue(map.containsKey(""))
+    assertEquals(42, map["lol"])
+    assertEquals(0, map[""])
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/hashPMap/simplePlusGet.kt

@@ -0,0 +1,24 @@
+import kotlin.reflect.jvm.internal.pcollections.HashPMap
+import kotlin.test.*
+
+fun box(): String {
+    var map = HashPMap.empty<String, Any>()!!
+
+    map = map.plus("lol", 42)!!
+
+    assertEquals(1, map.size())
+    assertTrue(map.containsKey("lol"))
+    assertFalse(map.containsKey(""))
+    assertEquals(42, map["lol"])
+    assertEquals(null, map[""])
+
+    map = map.plus("", 0)!!
+
+    assertEquals(2, map.size())
+    assertTrue(map.containsKey("lol"))
+    assertTrue(map.containsKey(""))
+    assertEquals(42, map["lol"])
+    assertEquals(0, map[""])
+
+    return "OK"
+}

compiler/testData/codegen/boxWithStdlib/hashPMap/simplePlusMinus.kt

@@ -0,0 +1,23 @@
+import kotlin.reflect.jvm.internal.pcollections.HashPMap
+import kotlin.test.*
+
+fun box(): String {
+    var map = HashPMap.empty<String, Any>()!!
+
+    map = map.plus("lol", 42)!!
+    map = map.minus("lol")!!
+
+    assertEquals(0, map.size())
+    assertFalse(map.containsKey("lol"))
+    assertEquals(null, map["lol"])
+
+    map = map.plus("abc", "a")!!
+    map = map.minus("abc")!!
+    map = map.plus("abc", "d")!!
+
+    assertEquals(1, map.size())
+    assertTrue(map.containsKey("abc"))
+    assertEquals("d", map["abc"])
+
+    return "OK"
+}