don't accept single '=' in array eval.

json-path/src/main/java/com/jayway/jsonpath/internal/filter/ArrayEvalFilter.java

@@ -36,7 +36,7 @@ public class ArrayEvalFilter extends Filter {
 
     @Override
     public Object filter(Object obj, JsonProvider jsonProvider) {
-        //[?(@.isbn = 10)]
+        //[?(@.isbn == 10)]
         List<Object> src = jsonProvider.toList(obj);
         List<Object> result = jsonProvider.createList();
 

json-path/src/main/java/com/jayway/jsonpath/internal/filter/eval/ExpressionEvaluator.java

@@ -28,7 +28,7 @@ public class ExpressionEvaluator {
             Long a = (Long) actual;
             Long e = Long.parseLong(expected.trim());
 
-            if ("=".equals(comparator) || "==".equals(comparator)) {
+            if ("==".equals(comparator)) {
                 return a.longValue() == e.longValue();
             } else if ("!=".equals(comparator) || "<>".equals(comparator)) {
                 return a.longValue() != e.longValue();
@@ -45,7 +45,7 @@ public class ExpressionEvaluator {
             Integer a = (Integer) actual;
             Integer e = Integer.parseInt(expected.trim());
 
-            if ("=".equals(comparator)) {
+            if ("==".equals(comparator)) {
                 return a.intValue() == e.intValue();
             } else if ("!=".equals(comparator) || "<>".equals(comparator)) {
                 return a.intValue() != e.intValue();
@@ -63,7 +63,7 @@ public class ExpressionEvaluator {
             Double a = (Double) actual;
             Double e = Double.parseDouble(expected.trim());
 
-            if ("=".equals(comparator) || "==".equals(comparator)) {
+            if ("==".equals(comparator)) {
                 return a.doubleValue() == e.doubleValue();
             } else if ("!=".equals(comparator) || "<>".equals(comparator)) {
                 return a.doubleValue() != e.doubleValue();
@@ -87,7 +87,7 @@ public class ExpressionEvaluator {
                 expected = expected.substring(0, expected.length()-1);
             }
 
-            if ("=".equals(comparator) || "==".equals(comparator)) {
+            if ("==".equals(comparator)) {
                 return a.equals(expected);
             } else if ("!=".equals(comparator) || "<>".equals(comparator)) {
                 return !a.equals(expected);

json-path/src/test/java/com/jayway/jsonpath/ExpressionEvalTest.java

@@ -17,7 +17,6 @@ public class ExpressionEvalTest {
     @Test
     public void long_eval() throws Exception {
 
-        assertTrue(ExpressionEvaluator.eval(1L, "=", "1"));
         assertTrue(ExpressionEvaluator.eval(1L, "==", "1"));
         assertTrue(ExpressionEvaluator.eval(2L, "!=", "1"));
         assertTrue(ExpressionEvaluator.eval(2L, ">", "1"));
@@ -30,14 +29,13 @@ public class ExpressionEvalTest {
         assertFalse(ExpressionEvaluator.eval(1, ">=", "2"));
         assertFalse(ExpressionEvaluator.eval(2, "<", "1"));
         assertFalse(ExpressionEvaluator.eval(2, "<=", "1"));
-        assertFalse(ExpressionEvaluator.eval(1, "=", "2"));
+        assertFalse(ExpressionEvaluator.eval(1, "==", "2"));
         assertFalse(ExpressionEvaluator.eval(1, "!=", "1"));
     }
 
     @Test
     public void double_eval() throws Exception {
 
-        assertTrue(ExpressionEvaluator.eval(1D, "=", "1"));
         assertTrue(ExpressionEvaluator.eval(1D, "==", "1"));
         assertTrue(ExpressionEvaluator.eval(2D, "!=", "1"));
         assertTrue(ExpressionEvaluator.eval(2D, ">", "1"));
@@ -50,7 +48,7 @@ public class ExpressionEvalTest {
         assertFalse(ExpressionEvaluator.eval(1D, ">=", "2"));
         assertFalse(ExpressionEvaluator.eval(2D, "<", "1"));
         assertFalse(ExpressionEvaluator.eval(2D, "<=", "1"));
-        assertFalse(ExpressionEvaluator.eval(1D, "=", "2"));
+        assertFalse(ExpressionEvaluator.eval(1D, "==", "2"));
         assertFalse(ExpressionEvaluator.eval(1D, "!=", "1"));
     }
 

json-path/src/test/java/com/jayway/jsonpath/JsonPathTest.java

@@ -77,7 +77,7 @@ public class JsonPathTest {
     @Test
     public void array_start_expands() throws Exception {
         //assertThat(JsonPath.<List<String>>read(ARRAY_EXPAND, "$[?(@.parent = 'ONE')].child.name"), hasItems("NAME_ONE"));
-        assertThat(JsonPath.<List<String>>read(ARRAY_EXPAND, "$[?(@['parent'] = 'ONE')].child.name"), hasItems("NAME_ONE"));
+        assertThat(JsonPath.<List<String>>read(ARRAY_EXPAND, "$[?(@['parent'] == 'ONE')].child.name"), hasItems("NAME_ONE"));
     }
 
     @Test
@@ -102,7 +102,7 @@ public class JsonPathTest {
 
     @Test
     public void filter_an_array() throws Exception {
-        List<Object> matches = JsonPath.read(ARRAY, "$.[?(@.value = 1)]");
+        List<Object> matches = JsonPath.read(ARRAY, "$.[?(@.value == 1)]");
 
         assertEquals(1, matches.size());
         System.out.println(matches);
@@ -231,22 +231,22 @@ public class JsonPathTest {
     @Test
     public void dot_in_predicate_works() throws Exception {
 
-        assertThat(JsonPath.<List<String>>read(PRODUCT_JSON, "$.product[?(@.version='4.0')].codename"), hasItems("Montreal"));
+        assertThat(JsonPath.<List<String>>read(PRODUCT_JSON, "$.product[?(@.version=='4.0')].codename"), hasItems("Montreal"));
 
     }
 
     @Test
     public void dots_in_predicate_works() throws Exception {
 
-        assertThat(JsonPath.<List<String>>read(PRODUCT_JSON, "$.product[?(@.attr.with.dot='A')].codename"), hasItems("Seattle"));
+        assertThat(JsonPath.<List<String>>read(PRODUCT_JSON, "$.product[?(@.attr.with.dot=='A')].codename"), hasItems("Seattle"));
 
     }
 
     @Test
     public void all_books_with_category_reference() throws Exception {
 
-        assertThat(JsonPath.<List<String>>read(DOCUMENT, "$..book[?(@.category='reference')].title"), hasItems("Sayings of the Century"));
+        assertThat(JsonPath.<List<String>>read(DOCUMENT, "$..book[?(@.category=='reference')].title"), hasItems("Sayings of the Century"));
-        assertThat(JsonPath.<List<String>>read(DOCUMENT, "$.store.book[?(@.category='reference')].title"), hasItems("Sayings of the Century"));
+        assertThat(JsonPath.<List<String>>read(DOCUMENT, "$.store.book[?(@.category=='reference')].title"), hasItems("Sayings of the Century"));
 
     }