add test file for solidity, update readme

README.md

@@ -160,7 +160,7 @@ Note: if you need support for Neovim 0.6.x please use the tag `compat/0.6`.
   - [ ] `scheme`
   - [ ] `slint`
   - [ ] `smithy`
-  - [ ] `solidity`
+  - [x] `solidity`
   - [ ] `sparql`
   - [ ] `sql`
   - [ ] `starlark`

test/test.sol

@@ -0,0 +1,114 @@
+interface SomeInterface {
+    function someFunction(uint a, uint b) external returns (uint c);
+    function testFunction(uint) external returns (uint);
+}
+
+contract Contract {
+    event SomeEvent(
+        uint a,
+        uint b,
+        uint c,
+        uint d
+    );
+
+    error SomeError(
+        uint a,
+        uint b,
+        uint c,
+        uint d
+    );
+
+    struct SomeStruct {
+        uint a;
+        uint b;
+        uint c;
+        uint d;
+    }
+
+    enum SomeEnum {
+        Entry1,
+        Entry2,
+        Entry3,
+        Entry4
+    }
+
+    constructor() {
+        // do some construction
+    }
+
+    fallback() external payable {
+        // this is
+        // fallback
+    }
+
+    receive() external payable {
+        // this is
+        // receive
+        // function
+    }
+
+    function someFunction(uint a, uint b) external pure returns (uint _c) {
+        _c = a + b;
+
+        if (true) {
+            // do
+            // something
+            // in if statement
+            emit SomeEvent(1, 2,
+                          3, 4);
+        } else {
+            // do
+            // something
+            // in else statement
+
+            revert SomeError(
+                1,
+                2,
+                3, 4
+            );
+        }
+
+        for (uint i = 0; i < 10; i++) {
+            // something
+            // in loop
+
+            uint j = 0;
+            while (j < 5) {
+                j++;
+                // something
+                // something
+
+                try {
+                    // will error
+                    // need to catch
+                } catch (bytes memory reason) {
+                    // catch
+                    // do some cleanup
+                }
+            }
+
+            do {
+                // this is do
+                // while
+
+                unchecked {
+                    j++;
+                }
+            } while (j < 5);
+        }
+    }
+
+    modifier withSomething(uint a) {
+        // modifier logic
+        _;
+    }
+}
+
+library SomeLibrary {
+    function libraryFunction(uint a, uint b, uint c, uint d) internal pure {
+        a = 1;
+        b = 2;
+        c = 3;
+        d = 4;
+    }
+}