fix: camelcase name handling (#94)

* fix: camelcase name handling

Previous change broke handling of json with camelcase.
This CL changes to call toLower() iff arguments are SCREAMING_SNAKE_CASE.
Also add simple test to prevent regression.

* chore: cleanup the code

Author: hirochachacha

json-to-go.js

@@ -321,7 +321,9 @@ function jsonToGo(json, typename, flatten = true)
 	function toProperCase(str)
 	{
 		// ensure that the SCREAMING_SNAKE_CASE is converted to snake_case
-		str=str.toLowerCase();
+		if (str.match(/^[_A-Z0-9]+$/)) {
+			str = str.toLowerCase();
+		}
 
 		// https://github.com/golang/lint/blob/5614ed5bae6fb75893070bdc0996a68765fdd275/lint.go#L771-L810
 		const commonInitialisms = [
@@ -419,4 +421,4 @@ if (typeof module != 'undefined') {
     } else {
         module.exports = jsonToGo
     }
-}
+}

json-to-go.test.js

@@ -0,0 +1,71 @@
+const jsonToGo = require("./json-to-go");
+
+function quote(str) {
+  return "'" + str
+    .replace(/\t/g, "\\t")
+    .replace(/\n/g, "\\n")
+    .replace(/'/g, "\\'") + "'"
+}
+
+function test() {
+  const testCases = [
+    {
+      input: '{"SourceCode": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tSourceCode string `json:"SourceCode"`\n}'
+    },
+    {
+      input: '{"source_code": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tSourceCode string `json:"source_code"`\n}'
+    },
+    {
+      input: '{"sourceCode": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tSourceCode string `json:"sourceCode"`\n}'
+    },
+    {
+      input: '{"SOURCE_CODE": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tSourceCode string `json:"SOURCE_CODE"`\n}'
+    },
+    {
+      input: '{"PublicIP": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tPublicIP string `json:"PublicIP"`\n}'
+    },
+    {
+      input: '{"public_ip": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tPublicIP string `json:"public_ip"`\n}'
+    },
+    {
+      input: '{"publicIP": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tPublicIP string `json:"publicIP"`\n}'
+    },
+    {
+      input: '{"PUBLIC_IP": ""}',
+      expected:
+        'type AutoGenerated struct {\n\tPublicIP string `json:"PUBLIC_IP"`\n}'
+    }
+  ];
+
+  for (const testCase of testCases) {
+    const got = jsonToGo(testCase.input);
+    if (got.error) {
+      console.assert(!got.error, `format('${testCase.input}'): ${got.error}`);
+    } else {
+      console.assert(
+        got.go === testCase.expected,
+        `format('${testCase.input}'): \n\tgot:  ${quote(got.go)}\n\twant: ${
+          quote(testCase.expected)
+        }`
+      );
+    }
+  }
+
+  console.log("done")
+}
+
+test();