Added antlr parsing tests as outlined in #200

bbakerman · andimarek · commit 986ece3fbb30 · 2017-05-26T16:53:40.000+02:00
diff --git a/src/main/java/graphql/parser/GraphqlAntlrToLanguage.java b/src/main/java/graphql/parser/GraphqlAntlrToLanguage.java
@@ -741,7 +741,7 @@ private Value getValue(GraphqlParser.ValueContext ctx) {
         throw new ShouldNotHappenException();
     }
 
-    private String parseString(String string) {
+    static String parseString(String string) {
         StringWriter writer = new StringWriter(string.length() - 2);
         int end = string.length() - 1;
         for (int i = 1; i < end; i++) {
@@ -778,7 +778,8 @@ private String parseString(String string) {
                     writer.write('\t');
                     continue;
                 case 'u':
-                    int codepoint = Integer.parseInt(string.substring(i + 1, i + 5), 16);
+                    String hexStr = string.substring(i + 1, i + 5);
+                    int codepoint = Integer.parseInt(hexStr, 16);
                     i += 4;
                     writer.write(codepoint);
                     continue;
diff --git a/src/test/groovy/graphql/parser/GraphqlAntlrToLanguageTest.groovy b/src/test/groovy/graphql/parser/GraphqlAntlrToLanguageTest.groovy
@@ -0,0 +1,62 @@
+package graphql.parser
+
+import spock.lang.Specification
+
+class GraphqlAntlrToLanguageTest extends Specification {
+
+    def "parsing quoted string should work"() {
+        given:
+        def input = '''"simple quoted"'''
+
+        when:
+        String parsed = GraphqlAntlrToLanguage.parseString(input)
+
+        then:
+        parsed == "simple quoted"
+    }
+
+    def "parsing escaped json should work"() {
+        given:
+        def input = '''"{\"name\": \"graphql\", \"year\": 2015}"'''
+
+        when:
+        String parsed = GraphqlAntlrToLanguage.parseString(input)
+
+        then:
+        parsed == '''{\"name\": \"graphql\", \"year\": 2015}'''
+    }
+
+    def "parsing quoted quote should work"() {
+        given:
+        def input = '''"""'''
+
+        when:
+        String parsed = GraphqlAntlrToLanguage.parseString(input)
+
+        then:
+        parsed == '''"'''
+    }
+
+    def "parsing emoji should work"() {
+        // needs surrogate pairs for this emoji
+        given:
+        def input = '''"\\ud83c\\udf7a"'''
+
+        when:
+        String parsed = GraphqlAntlrToLanguage.parseString(input)
+
+        then:
+        parsed == '''🍺''' // contains the beer icon 	U+1F37A  : http://www.charbase.com/1f37a-unicode-beer-mug
+    }
+
+    def "parsing simple unicode should work"() {
+        given:
+        def input = '''"\\u56fe"'''
+
+        when:
+        String parsed = GraphqlAntlrToLanguage.parseString(input)
+
+        then:
+        parsed == '''图'''
+    }
+}
