add tests

remix-resolve/tests/example_1/greeter.sol

+pragma solidity ^0.5.0;
+import "./mortal.sol";
+
+contract Greeter is Mortal {
+    /* Define variable greeting of the type string */
+    string greeting;
+
+    /* This runs when the contract is executed */
+    constructor(string memory _greeting) public {
+        greeting = _greeting;
+    }
+
+    /* Main function */
+    function greet() public view returns (string memory) {
+        return greeting;
+    }
+}

remix-resolve/tests/example_1/mortal.sol

+pragma solidity ^0.5.0;
+
+contract Mortal {
+    /* Define variable owner of the type address */
+    address payable owner;
+
+    /* This function is executed at initialization and sets the owner of the contract */
+    function mortal() public { owner = msg.sender; }
+
+    /* Function to recover the funds on the contract */
+    function kill() public { if (msg.sender == owner) selfdestruct(owner); }
+}