adding support for prettier-ignore (prettier-solidity#202)

* adding support for prettier-ignore

* the test look nicer now

src/printer.js

@@ -1,4 +1,5 @@
 const nodes = require('./nodes');
+const { hasNodeIgnoreComment } = require('./prettier-comments/common/util.js');
 
 function genericPrint(path, options, print) {
   const node = path.getValue();
@@ -10,6 +11,10 @@ function genericPrint(path, options, print) {
     throw new Error(`Unknown type: ${JSON.stringify(node.type)}`);
   }
 
+  if (hasNodeIgnoreComment(node)) {
+    return options.originalText.slice(node.range[0], node.range[1] + 1);
+  }
+
   return nodes[node.type].print({ node, options, path, print });
 }
 

tests/PrettierIgnore/PrettierIgnore.sol

@@ -0,0 +1,18 @@
+pragma solidity ^0.5.2;
+
+contract PrettierIgnore {
+    function() public payable {
+        matrix(
+            1, 0, 0,
+            0, 1, 0,
+            0, 0, 1
+        );
+
+        // prettier-ignore
+        matrix(
+            1, 0, 0,
+            0, 1, 0,
+            0, 0, 1
+        );
+    }
+}

tests/PrettierIgnore/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,38 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`PrettierIgnore.sol 1`] = `
+pragma solidity ^0.5.2;
+
+contract PrettierIgnore {
+    function() public payable {
+        matrix(
+            1, 0, 0,
+            0, 1, 0,
+            0, 0, 1
+        );
+
+        // prettier-ignore
+        matrix(
+            1, 0, 0,
+            0, 1, 0,
+            0, 0, 1
+        );
+    }
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+pragma solidity ^0.5.2;
+
+contract PrettierIgnore {
+    function() public payable {
+        matrix(1, 0, 0, 0, 1, 0, 0, 0, 1);
+
+        // prettier-ignore
+        matrix(
+            1, 0, 0,
+            0, 1, 0,
+            0, 0, 1
+        );
+    }
+}
+
+`;

tests/PrettierIgnore/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname);