Emerge Yul recompiler (#1)

Provide a modified (and incomplete) version of ZKSync zksolc that can compile the most basic contracts

crates/solidity/src/tests/factory_dependency.rs

@@ -0,0 +1,93 @@
+//!
+//! The Solidity compiler unit tests for factory dependencies.
+//!
+
+#![cfg(test)]
+
+use std::collections::BTreeMap;
+
+use crate::solc::pipeline::Pipeline as SolcPipeline;
+
+pub const MAIN_CODE: &str = r#"
+// SPDX-License-Identifier: MIT
+
+pragma solidity >=0.4.16;
+
+import "./callable.sol";
+
+contract Main {
+    function main() external returns(uint256) {
+        Callable callable = new Callable();
+
+        callable.set(10);
+        return callable.get();
+    }
+}
+"#;
+
+pub const CALLABLE_CODE: &str = r#"
+// SPDX-License-Identifier: MIT
+
+pragma solidity >=0.4.16;
+
+contract Callable {
+    uint256 value;
+
+    function set(uint256 x) external {
+        value = x;
+    }
+
+    function get() external view returns(uint256) {
+        return value;
+    }
+}
+"#;
+
+#[test]
+fn default() {
+    let mut sources = BTreeMap::new();
+    sources.insert("main.sol".to_owned(), MAIN_CODE.to_owned());
+    sources.insert("callable.sol".to_owned(), CALLABLE_CODE.to_owned());
+
+    let output = super::build_solidity(
+        sources,
+        BTreeMap::new(),
+        None,
+        SolcPipeline::Yul,
+        era_compiler_llvm_context::OptimizerSettings::cycles(),
+    )
+    .expect("Build failure");
+
+    assert_eq!(
+        output
+            .contracts
+            .as_ref()
+            .expect("Missing field `contracts`")
+            .get("main.sol")
+            .expect("Missing file `main.sol`")
+            .get("Main")
+            .expect("Missing contract `main.sol:Main`")
+            .factory_dependencies
+            .as_ref()
+            .expect("Missing field `factory_dependencies`")
+            .len(),
+        1,
+        "Expected 1 factory dependency in `main.sol:Main`"
+    );
+    assert_eq!(
+        output
+            .contracts
+            .as_ref()
+            .expect("Missing field `contracts`")
+            .get("callable.sol")
+            .expect("Missing file `callable.sol`")
+            .get("Callable")
+            .expect("Missing contract `callable.sol:Callable`")
+            .factory_dependencies
+            .as_ref()
+            .expect("Missing field `factory_dependencies`")
+            .len(),
+        0,
+        "Expected 0 factory dependencies in `callable.sol:Callable`"
+    );
+}