load(":m4_test.bzl", "m4_test")

genrule(
    name = "m4_help",
    testonly = True,
    outs = ["m4_help.txt"],
    cmd = "$(execpath //:m4) --help > $@",
    cmd_bat = "$(execpath //:m4) --help > $@",
    tools = ["//:m4"],
)

# Adapted from checks/028.define
m4_test(
    name = "define_test",
    expected = ["Hello world."],
    input = [
        "define(`foo', `Hello world.')dnl",
        "foo",
    ],
)

# Adapted from checks/190.eval
m4_test(
    name = "eval_test",
    expected = [
        "5",
        "14",
        "21",
    ],
    input = [
        "eval(2 + 3)",
        "eval(10 * 2 - 6)",
        "eval(3 * (2 + 5))",
    ],
)

# Adapted from checks/066.ifdef
m4_test(
    name = "ifdef_test",
    expected = [
        "foo is not defined",
        "foo is defined",
    ],
    input = [
        "ifdef(`foo', ``foo' is defined', ``foo' is not defined')",
        "define(`foo', `')dnl",
        "ifdef(`foo', ``foo' is defined', ``foo' is not defined')",
    ],
)

# Adapted from checks/164.len
m4_test(
    name = "len_test",
    expected = [
        "0",
        "6",
    ],
    input = [
        "len()",
        "len(`abcdef')",
    ],
)

# Adapted from checks/026.macro_expa -- tests -D command-line defines
m4_test(
    name = "cmdline_define_test",
    expected = ["Hello"],
    input = ["foo"],
    m4_flags = [
        "-Dbar=Hello",
        "-Dfoo=bar",
    ],
)

# Exercises gnulib regex via the regexp builtin
m4_test(
    name = "regexp_test",
    expected = ["1"],
    input = ["regexp(`Hello world', `[a-z]')"],
)

# Exercises gnulib regex via the patsubst builtin
m4_test(
    name = "patsubst_test",
    expected = ["h*ll*"],
    input = ["patsubst(`hello', `[eo]', `*')"],
)