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from pgcli.packages.prioritization import PrevalenceCounter


def test_prevalence_counter():
    counter = PrevalenceCounter()
    sql = '''SELECT * FROM foo WHERE bar GROUP BY baz;
             select * from foo;
             SELECT * FROM foo WHERE bar GROUP
             BY baz'''
    counter.update(sql)

    keywords = ['SELECT', 'FROM', 'GROUP BY']
    expected = [3, 3, 2]
    kw_counts = [counter.keyword_count(x) for x in keywords]
    assert kw_counts == expected
    assert counter.keyword_count('NOSUCHKEYWORD') == 0

    names = ['foo', 'bar', 'baz']
    name_counts = [counter.name_count(x) for x in names]
    assert name_counts == [3, 2, 2]