--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_branch.py	Wed Mar 08 17:04:58 2023 +0100
@@ -0,0 +1,46 @@
+from tests import common
+import hglib
+from hglib.util import b
+
+class test_branch(common.basetest):
+    def test_empty(self):
+        self.assertEquals(self.client.branch(), b('default'))
+
+    def test_basic(self):
+        self.assertEquals(self.client.branch(b('foo')), b('foo'))
+        self.append('a', 'a')
+        rev, node = self.client.commit(b('first'), addremove=True)
+
+        rev = self.client.log(node)[0]
+
+        self.assertEquals(rev.branch, b('foo'))
+        self.assertEquals(self.client.branches(),
+                          [(rev.branch, int(rev.rev), rev.node[:12])])
+
+    def test_reset_with_name(self):
+        self.assertRaises(ValueError, self.client.branch, b('foo'), clean=True)
+
+    def test_reset(self):
+        self.client.branch(b('foo'))
+        self.assertEquals(self.client.branch(clean=True), b('default'))
+
+    def test_exists(self):
+        self.append('a', 'a')
+        self.client.commit(b('first'), addremove=True)
+        self.client.branch(b('foo'))
+        self.append('a', 'a')
+        self.client.commit(b('second'))
+        self.assertRaises(hglib.error.CommandError,
+                          self.client.branch, b('default'))
+
+    def test_force(self):
+        self.append('a', 'a')
+        self.client.commit(b('first'), addremove=True)
+        self.client.branch(b('foo'))
+        self.append('a', 'a')
+        self.client.commit(b('second'))
+
+        self.assertRaises(hglib.error.CommandError,
+                          self.client.branch, b('default'))
+        self.assertEquals(self.client.branch(b('default'), force=True),
+                          b('default'))