circuitpython/tests/float/string_format_modulo2_intbig.py

# test formatting floats with large precision, that it doesn't overflow the buffer


def test(num, num_str):
    if num == float("inf") or num == 0.0 and num_str != "0.0":
        # skip numbers that overflow or underflow the FP precision
        return
    for kind in ("e", "f", "g"):
        # check precision either side of the size of the buffer (32 bytes)
        for prec in range(23, 36, 2):
            fmt = "%." + "%d" % prec + kind
            s = fmt % num
            check = abs(float(s) - num)
            if num > 1:
                check /= num
            if check > 1e-6:
                print("FAIL", num_str, fmt, s, len(s), check)


# check most powers of 10, making sure to include exponents with 3 digits
for e in range(-101, 102):
    num = pow(10, e)
    test(num, "1e%d" % e)
tests/string_format_modulo2: Split off intbig test. 2017-03-06 18:13:36 -05:00			`# test formatting floats with large precision, that it doesn't overflow the buffer`

tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 2020-03-22 22:26:08 -04:00
tests/string_format_modulo2: Split off intbig test. 2017-03-06 18:13:36 -05:00			`def test(num, num_str):`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 2020-03-22 22:26:08 -04:00			`if num == float("inf") or num == 0.0 and num_str != "0.0":`
tests/string_format_modulo2: Split off intbig test. 2017-03-06 18:13:36 -05:00			`# skip numbers that overflow or underflow the FP precision`
			`return`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 2020-03-22 22:26:08 -04:00			`for kind in ("e", "f", "g"):`
tests/string_format_modulo2: Split off intbig test. 2017-03-06 18:13:36 -05:00			`# check precision either side of the size of the buffer (32 bytes)`
			`for prec in range(23, 36, 2):`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 2020-03-22 22:26:08 -04:00			`fmt = "%." + "%d" % prec + kind`
tests/string_format_modulo2: Split off intbig test. 2017-03-06 18:13:36 -05:00			`s = fmt % num`
			`check = abs(float(s) - num)`
			`if num > 1:`
			`check /= num`
			`if check > 1e-6:`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 2020-03-22 22:26:08 -04:00			`print("FAIL", num_str, fmt, s, len(s), check)`

tests/string_format_modulo2: Split off intbig test. 2017-03-06 18:13:36 -05:00
			`# check most powers of 10, making sure to include exponents with 3 digits`
			`for e in range(-101, 102):`
			`num = pow(10, e)`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 2020-03-22 22:26:08 -04:00			`test(num, "1e%d" % e)`