1 files changed, 83 insertions, 0 deletions
diff --git a/pyflakes/test/test_match.py b/pyflakes/test/test_match.py
new file mode 100644
index 0000000..89826e3
--- /dev/null
+++ b/pyflakes/test/test_match.py
@@ -0,0 +1,83 @@
+from sys import version_info
+
+from pyflakes.test.harness import TestCase, skipIf
+
+
+@skipIf(version_info < (3, 10), "Python >= 3.10 only")
+class TestMatch(TestCase):
+    def test_match_bindings(self):
+        self.flakes('''
+            def f():
+                x = 1
+                match x:
+                    case 1 as y:
+                        print(f'matched as {y}')
+        ''')
+        self.flakes('''
+            def f():
+                x = [1, 2, 3]
+                match x:
+                    case [1, y, 3]:
+                        print(f'matched {y}')
+        ''')
+        self.flakes('''
+            def f():
+                x = {'foo': 1}
+                match x:
+                    case {'foo': y}:
+                        print(f'matched {y}')
+        ''')
+
+    def test_match_pattern_matched_class(self):
+        self.flakes('''
+            from a import B
+
+            match 1:
+                case B(x=1) as y:
+                    print(f'matched {y}')
+        ''')
+        self.flakes('''
+            from a import B
+
+            match 1:
+                case B(a, x=z) as y:
+                    print(f'matched {y} {a} {z}')
+        ''')
+
+    def test_match_placeholder(self):
+        self.flakes('''
+            def f():
+                match 1:
+                    case _:
+                        print('catchall!')
+        ''')
+
+    def test_match_singleton(self):
+        self.flakes('''
+            match 1:
+                case True:
+                    print('true')
+        ''')
+
+    def test_match_or_pattern(self):
+        self.flakes('''
+            match 1:
+                case 1 | 2:
+                    print('one or two')
+        ''')
+
+    def test_match_star(self):
+        self.flakes('''
+            x = [1, 2, 3]
+            match x:
+                case [1, *y]:
+                    print(f'captured: {y}')
+        ''')
+
+    def test_match_double_star(self):
+        self.flakes('''
+            x = {'foo': 'bar', 'baz': 'womp'}
+            match x:
+                case {'foo': k1, **rest}:
+                    print(f'{k1=} {rest=}')
+        ''')