Work on tests.

jaq-core/tests/named.rs

@@ -108,6 +108,20 @@ fn limit() {
     give(json!(null), "[limit(-1; 0, 1)]", json!([]));
 }
 
+yields!(min_empty, "[] | min_by(.)", json!(null));
+// when output is equal, min_by selects the left element and max_by the right one
+yields!(
+    min_max_eq,
+    "[{a: 1, b: 3}, {a: 1, b: 2}] | [(min_by(.a), max_by(.a)) | .b]",
+    [3, 2]
+);
+// multiple-output functions can be used to differentiate elements
+yields!(
+    max_mult,
+    "[{a: 1, b: 3}, {a: 1, b: 2}] | max_by(.a, .b) | .b",
+    3
+);
+
 #[test]
 fn range() {
     let y = json!([-1, -1, 0, 1, 1]);

jaq-std/tests/std.rs

@@ -116,10 +116,10 @@ yields!(
 
 #[test]
 fn min_max() {
-    give(json!([]), "min", json!(null));
-    give(json!([]), "max", json!(null));
     give(json!([1, 4, 2]), "min", json!(1));
     give(json!([1, 4, 2]), "max", json!(4));
+    // TODO: find examples where `min_by(f)` yields output different from `min`
+    // (and move it then to jaq-core/tests/named.rs)
     give(
         json!([{"a": {"b": {"c": 1}}}, {"a": {"b": {"c": 4}}}, {"a": {"b": {"c": 2}}}]),
         "min_by(.a.b.c)",
@@ -130,24 +130,6 @@ fn min_max() {
         "max_by(.a.b.c)",
         json!({"a": {"b": {"c": 4}}}),
     );
-    // min_by selects the left element when they're equal
-    give(
-        json!([{"a": 1, "b": 3}, {"a": 1, "b": 2}]),
-        "min_by(.a) | .b",
-        json!(3),
-    );
-    // max_by selects the right one
-    give(
-        json!([{"a": 1, "b": 3}, {"a": 1, "b": 2}]),
-        "max_by(.a) | .b",
-        json!(2),
-    );
-    // multiple-output functions can be used to differentiate elements
-    give(
-        json!([{"a": 1, "b": 3}, {"a": 1, "b": 2}]),
-        "max_by(.a, .b) | .b",
-        json!(3),
-    );
 }
 
 #[test]