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These tests consist of various Python constructions (hopefully a somewhat comprehensive set) with specific timestamp annotations scattered throughout. When the tests are run using the Python 3 interpreter, these annotations are checked and compared to the "current timestamp" to see that they are in agreement. This is what makes the tests "self-validating". There are a few different kinds of annotations: the basic `t[4]` style (meaning this is executed at timestamp 4), the `t.dead[4]` variant (meaning this _would_ happen at timestamp 4, but it is in a dead branch), and `t.never` (meaning this is never executed at all). In addition to this, there is a query, MissingAnnotations, which checks whether we have applied these annotations maximally. Many expression nodes are not actually annotatable, so there is a sizeable list of excluded nodes for that query.
35 lines
620 B
Python
35 lines
620 B
Python
"""F-string evaluation order."""
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from timer import test
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@test
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def test_simple_fstring(t):
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name = "world" @ t[0]
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s = f"hello {name @ t[1]}" @ t[2]
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@test
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def test_multi_expr_fstring(t):
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a = "hello" @ t[0]
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b = "world" @ t[1]
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s = f"{a @ t[2]} {b @ t[3]}" @ t[4]
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@test
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def test_nested_fstring(t):
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inner = "world" @ t[0]
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s = f"hello {f'dear {inner @ t[1]}' @ t[2]}" @ t[3]
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@test
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def test_format_spec(t):
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x = 3.14159 @ t[0]
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s = f"{x @ t[1]:.2f}" @ t[2]
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@test
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def test_method_in_fstring(t):
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name = "world" @ t[0]
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s = f"hello {((name @ t[1]).upper @ t[2])() @ t[3]}" @ t[4]
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