Migrated to Open Zeppelin Test Environment and improved tests

contracts/test/BondingContractStub.sol

@@ -0,0 +1,17 @@
+pragma solidity 0.5.17;
+
+contract BondingContractStub {
+  mapping(address => uint256) public unbondedValue;
+
+  function availableUnbondedValue(
+    address operator,
+    address, // bondCreator,
+    address // additionalAuthorizedContract
+  ) external view returns (uint256) {
+    return unbondedValue[operator];
+  }
+
+  function setBondableValue(address operator, uint256 value) public {
+    unbondedValue[operator] = value;
+  }
+}

test/contracts/BranchStub.sol → contracts/test/BranchStub.sol

@@ -1,6 +1,6 @@
 pragma solidity 0.5.17;
 
-import '../../contracts/Branch.sol';
+import "../../contracts/Branch.sol";
 
 contract BranchStub {
   function getSlot(uint node, uint position) public pure returns (uint) {

test/contracts/IntervalStub.sol → contracts/test/IntervalStub.sol

@@ -1,7 +1,7 @@
 pragma solidity 0.5.17;
 
-import '../../contracts/Interval.sol';
-import '../../contracts/DynamicArray.sol';
+import "../../contracts/Interval.sol";
+import "../../contracts/DynamicArray.sol";
 
 contract IntervalStub {
     function skip(

test/contracts/PositionStub.sol → contracts/test/PositionStub.sol

@@ -1,6 +1,6 @@
 pragma solidity 0.5.17;
 
-import '../../contracts/Position.sol';
+import "../../contracts/Position.sol";
 
 contract PositionStub {
   function slot(uint a) public pure returns (uint) {

test/contracts/RNGStub.sol → contracts/test/RNGStub.sol

@@ -1,6 +1,6 @@
 pragma solidity 0.5.17;
 
-import '../../contracts/RNG.sol';
+import "../../contracts/RNG.sol";
 
 contract RNGStub {
     function bitsRequired(uint range) public pure returns (uint) {

test/contracts/SortitionTreeStub.sol → contracts/test/SortitionTreeStub.sol

@@ -1,6 +1,6 @@
 pragma solidity 0.5.17;
 
-import '../../contracts/SortitionTree.sol';
+import "../../contracts/SortitionTree.sol";
 
 contract SortitionTreeStub is SortitionTree {
     function publicSetLeaf(uint256 position, uint256 leaf) public {

test/contracts/StackStub.sol → contracts/test/StackStub.sol

@@ -1,6 +1,6 @@
 pragma solidity 0.5.17;
 
-import '../../contracts/SortitionTree.sol';
+import "../../contracts/SortitionTree.sol";
 contract StackStub is SortitionTree {
     uint256[] stack;