feat(test): test emojis

Author: BobTheBuidler

mypyc/test-data/run-strings.test

@@ -862,3 +862,44 @@ def test_count_multi_start_end() -> None:
     assert string.count("aaa", 0, 12) == 1, string.count("aaa", 0, 12)
     assert string.count("bbb", 0, 12) == 2, string.count("bbb", 0, 12)
     assert string.count("ccc", 0, 12) == 1, string.count("ccc", 0, 12)
+def test_count_emoji() -> None:
+    string = "ñbñ🚀ñ"
+    assert string.count("😴") == 1  # 😴 appeared once
+    assert string.count("🚀") == 2  # 🚀 launched twice
+    assert string.count("ñ") == 2  # ñ hanging around twice
+def test_count_start_emoji() -> None:
+    string = "ñbñ🚀ñ"
+    assert string.count("😴", 2) == string.count("😴", -4) == 0, (string.count("😴", 2), string.count("😴", -4))
+    assert string.count("🚀", 2) == string.count("🚀", -4) == 2, (string.count("🚀", 2), string.count("🚀", -4))
+    assert string.count("ñ", 2) == string.count("ñ", -4) == 1, (string.count("ñ", 2), string.count("ñ", -4))
+    # Out of bounds
+    assert string.count("😴", 8) == 0
+    assert string.count("😴", -8) == 1
+    assert string.count("🚀", 8) == 0
+    assert string.count("ñ", -8) == 2
+def test_count_start_end_emoji() -> None:
+    string = "ñbñ🚀ñ"
+    assert string.count("😴", 0, 4) == 1, string.count("😴", 0, 4)
+    assert string.count("🚀", 0, 4) == 1, string.count("🚀", 0, 4)
+    assert string.count("ñ", 0, 4) == 2, string.count("ñ", 0, 4)
+def test_count_multi_emoji() -> None:
+    string = "😴😴😴🚀🚀ñññ🚀ñññ🚀"
+    assert string.count("😴😴😴") == 1
+    assert string.count("🚀🚀") == 1
+    assert string.count("ñ") == 5
+def test_count_multi_start_emoji() -> None:
+    string = "😴😴😴🚀ñññ🚀ñññ🚀"
+    assert string.count("😴😴😴", 6) == string.count("😴😴😴", -12) == 0, (string.count("😴😴😴", 6), string.count("😴😴😴", -12))
+    assert string.count("🚀ñ", 6) == string.count("🚀ñ", -12) == 1, (string.count("🚀ñ", 6), string.count("🚀ñ", -12))
+    assert string.count("ññ", 6) == string.count("ññ", -12) == 2, (string.count("ññ", 6), string.count("ññ", -12))
+    # Boundary pushing 🎢
+    assert string.count("😴", 20) == 0
+    assert string.count("😴", -20) == 1
+    assert string.count("🚀", 20) == 0
+    assert string.count("ñ", -20) == 5
+def test_count_multi_start_end_emoji() -> None:
+    # Tuning in a specific range 📻
+    string = "😴😴😴🚀🚀ñññ🚀ñññ🚀"
+    assert string.count("😴", 0, 12) == 3, string.count("😴", 0, 12)
+    assert string.count("🚀", 0, 12) == 2, string.count("🚀", 0, 12)
+    assert string.count("ññ", 0, 12) == 1, string.count("ññ", 0, 12)