Compile common stdlib tests against common stdlib

Declare platform-specific test utilities as expect.

libraries/stdlib/common/test/jsCollectionFactories.kt

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+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package test.collections.js
+
+// TODO: These have actuals only in JVM tests, and in JS they are in stdlib
+public expect fun <V> stringMapOf(vararg pairs: Pair<String, V>): HashMap<String, V>
+public expect fun <V> linkedStringMapOf(vararg pairs: Pair<String, V>): LinkedHashMap<String, V>
+public expect fun stringSetOf(vararg elements: String): HashSet<String>
+public expect fun linkedStringSetOf(vararg elements: String): LinkedHashSet<String>

libraries/stdlib/common/test/testUtils.kt

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+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package test
+
+public expect fun assertTypeEquals(expected: Any?, actual: Any?)
+
+internal expect fun String.removeLeadingPlusOnJava6(): String
+internal expect fun doubleTotalOrderEquals(a: Double?, b: Double?): Boolean
+
+// TODO
+internal expect class NumberFormatException : Throwable