Implement console.groupCollapsed (#1452)

This implementation of groupCollapsed is intentionally different
from the spec defined by whatwg. See the conversation in #1355
and #1363.

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/console_group.ts b/tests/console_group.ts
new file mode 100644
index 000000000..990acc35c
--- /dev/null
+++ b/tests/console_group.ts
@@ -0,0 +1,15 @@
+console.group("1");
+console.log("2");
+console.group("3");
+console.log("4");
+console.groupEnd();
+console.groupEnd();
+
+console.groupCollapsed("5");
+console.log("6");
+console.group("7");
+console.log("8");
+console.groupEnd();
+console.groupEnd();
+console.log("9");
+console.log("10");