| import pytest |
| from solution import Gradebook, GradeError, letter, weighted_average |
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|
| @pytest.mark.parametrize("score,expected", [ |
| (100, "AA"), (90, "AA"), (89.99, "BA"), (85, "BA"), (80, "BB"), (75, "CB"), |
| (70, "CC"), (60, "DC"), (50, "DD"), (49.5, "FF"), (0, "FF"), |
| ]) |
| def test_letter_thresholds_are_inclusive(score, expected): |
| assert letter(score) == expected |
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|
|
| @pytest.mark.parametrize("score", [-1, 100.5]) |
| def test_letter_out_of_range(score): |
| with pytest.raises(GradeError): |
| letter(score) |
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|
|
| def test_weighted_average_normalizes_weights(): |
| assert weighted_average([80, 100], [1, 3]) == 95.0 |
| assert weighted_average([70, 80, 90], [0.2, 0.3, 0.5]) == 83.0 |
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|
| def test_weighted_average_rounds_to_two_decimals(): |
| assert weighted_average([1, 2, 2], [1, 1, 1]) == 1.67 |
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|
|
| def test_weighted_average_errors(): |
| with pytest.raises(GradeError): |
| weighted_average([1, 2], [1]) |
| with pytest.raises(GradeError): |
| weighted_average([], []) |
| with pytest.raises(GradeError): |
| weighted_average([50, 60], [0, 0]) |
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|
|
| def test_add_and_average(): |
| g = Gradebook([0.4, 0.6]) |
| g.add("Ali", [50, 100]) |
| assert g.average("Ali") == 80.0 |
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|
|
| def test_add_rejects_duplicates_and_wrong_length(): |
| g = Gradebook([0.5, 0.5]) |
| g.add("Ali", [1, 2]) |
| with pytest.raises(GradeError): |
| g.add("Ali", [3, 4]) |
| with pytest.raises(GradeError): |
| g.add("Veli", [3]) |
|
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|
|
| def test_ranking_descending_with_alphabetical_ties(): |
| g = Gradebook([1]) |
| g.add("Zeynep", [70]) |
| g.add("Can", [90]) |
| g.add("Ayşe", [70]) |
| assert g.ranking() == ["Can", "Ayşe", "Zeynep"] |
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|
|
| def test_passed_includes_threshold(): |
| g = Gradebook([1]) |
| g.add("A", [50]) |
| g.add("B", [49.99]) |
| g.add("C", [80]) |
| assert g.passed() == ["C", "A"] |
| assert g.passed(threshold=80) == ["C"] |
|
|
