test: Refactor SortBy unmarshal test like #4323

Use the testJSONUnmarshalOnly helper for the success case of
TestProjectV2ViewSortBy_UnmarshalJSON instead of unmarshaling by hand
and asserting field by field, matching the style introduced in #4323.
The error-case subtests stay manual since the helper expects a
successful unmarshal.

Author: JamBalaya56562

github/projects_test.go

@@ -1753,19 +1753,11 @@ func TestProjectV2ViewSortBy_UnmarshalJSON(t *testing.T) {
 		t.Parallel()
 		// The second element uses a string field_id, which the OpenAPI schema
 		// permits. The first exceeds 2^53 to confirm int64 (not float64) decoding.
-		var got []*ProjectV2ViewSortBy
-		if err := json.Unmarshal([]byte(`[[9007199254740993,"asc"],["456","desc"]]`), &got); err != nil {
-			t.Fatalf("Unmarshal returned error: %v", err)
-		}
-		if len(got) != 2 {
-			t.Fatalf("len(got) = %d, want 2", len(got))
-		}
-		if got[0].GetFieldID() != 9007199254740993 || got[0].GetDirection() != "asc" {
-			t.Errorf("got[0] = %+v, want {9007199254740993 asc}", got[0])
-		}
-		if got[1].GetFieldID() != 456 || got[1].GetDirection() != "desc" {
-			t.Errorf("got[1] = %+v, want {456 desc}", got[1])
+		want := []*ProjectV2ViewSortBy{
+			{FieldID: Ptr(int64(9007199254740993)), Direction: Ptr("asc")},
+			{FieldID: Ptr(int64(456)), Direction: Ptr("desc")},
 		}
+		testJSONUnmarshalOnly(t, want, `[[9007199254740993,"asc"],["456","desc"]]`)
 	})
 
 	t.Run("wrong tuple length is an error", func(t *testing.T) {