make json tests optional

ethcore/Cargo.toml

@@ -25,6 +25,8 @@ crossbeam = "0.1.5"
 lazy_static = "0.1"
 
 [features]
+default = ["json-tests"]
 jit = ["evmjit"]
 evm_debug = []
+json-tests = []
 test-heavy = []

ethcore/src/tests/test_common.rs

@@ -12,6 +12,7 @@ macro_rules! declare_test {
 		#[ignore]
 		#[test]
 		#[allow(non_snake_case)]
+		#[cfg(feature="json-tests")]
 		fn $id() {
 			test!($name);
 		}
@@ -20,6 +21,7 @@ macro_rules! declare_test {
 		#[cfg(feature = "test-heavy")]
 		#[test]
 		#[allow(non_snake_case)]
+		#[cfg(feature="json-tests")]
 		fn $id() {
 			test!($name);
 		}
@@ -27,6 +29,7 @@ macro_rules! declare_test {
 	($id: ident, $name: expr) => {
 		#[test]
 		#[allow(non_snake_case)]
+		#[cfg(feature="json-tests")]
 		fn $id() {
 			test!($name);
 		}