Add unhappy paths

Author: TheSmartnik

contracts/simple_greeter.sol

@@ -13,6 +13,7 @@ contract SimpleGreeter {
   }
 
   function setSuperGreeting(string calldata greeting) external {
+    require(msg.sender == owner, "Only owner");
     _greeting = greeting;
   }
 }

lib/rspec/eth/helper_methods.rb

@@ -24,7 +24,7 @@ def accounts
 
       def contract_path
         @contract_path ||= begin
-          filename = self.class.to_s.split("::").last.underscore
+          filename = self.class.metadata[:file_path].split('/').last.gsub('_spec', '').gsub('.rb', '')
           File.join(RSpec::Eth::Config.contracts_path, "#{filename}.sol")
         end
       end

spec/rspec/integration/simple_greeter_spec.rb

@@ -12,11 +12,22 @@
 
   it 'has owner' do
     expect(contract.call.owner).to be_present
+    expect(contract.call.owner).to eq(accounts[0][2..-1])
   end
 
   it 'changes message' do
     contract.transact_and_wait.set_super_greeting("Yo")
 
     expect(contract.call.greet).to eq("Yo")
   end
+
+  context 'when sender not owner' do
+    before { contract.sender = accounts[1] }
+
+    it 'trying to set not from owner' do
+      expect {
+        contract.transact_and_wait.set_super_greeting("Yo")
+      }.to raise_exception(IOError, "VM Exception while processing transaction: revert Only owner")
+    end
+  end
 end