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import os
import pytest

from buildstream._exceptions import ErrorDomain, LoadErrorReason
from tests.testutils import cli

DATA_DIR = os.path.join(
    os.path.dirname(os.path.realpath(__file__)),
    'dependencies',
)


@pytest.mark.datafiles(DATA_DIR)
def test_two_files(cli, datafiles):
    project = str(datafiles)

    elements = cli.get_pipeline(project, ['target.bst'])
    assert elements == ['firstdep.bst', 'target.bst']


@pytest.mark.datafiles(DATA_DIR)
def test_shared_dependency(cli, datafiles):
    project = str(datafiles)

    elements = cli.get_pipeline(project, ['shareddeptarget.bst'])
    assert elements == ['firstdep.bst', 'shareddep.bst', 'shareddeptarget.bst']


@pytest.mark.datafiles(DATA_DIR)
def test_dependency_dict(cli, datafiles):
    project = str(datafiles)
    elements = cli.get_pipeline(project, ['target-depdict.bst'])
    assert elements == ['firstdep.bst', 'target-depdict.bst']


@pytest.mark.datafiles(DATA_DIR)
def test_invalid_dependency_declaration(cli, datafiles):
    project = str(datafiles)
    result = cli.run(project=project, args=['show', 'invaliddep.bst'])
    result.assert_main_error(ErrorDomain.LOAD, LoadErrorReason.INVALID_DATA)


@pytest.mark.datafiles(DATA_DIR)
def test_invalid_dependency_type(cli, datafiles):
    project = str(datafiles)
    result = cli.run(project=project, args=['show', 'invaliddeptype.bst'])
    result.assert_main_error(ErrorDomain.LOAD, LoadErrorReason.INVALID_DATA)


@pytest.mark.datafiles(DATA_DIR)
def test_circular_dependency(cli, datafiles):
    project = str(datafiles)
    result = cli.run(project=project, args=['show', 'circulartarget.bst'])
    result.assert_main_error(ErrorDomain.LOAD, LoadErrorReason.CIRCULAR_DEPENDENCY)


@pytest.mark.datafiles(DATA_DIR)
def test_build_dependency(cli, datafiles):
    project = str(datafiles)

    elements = cli.get_pipeline(project, ['builddep.bst'], scope='run')
    assert elements == ['builddep.bst']

    elements = cli.get_pipeline(project, ['builddep.bst'], scope='build')
    assert elements == ['firstdep.bst']


@pytest.mark.datafiles(DATA_DIR)
def test_runtime_dependency(cli, datafiles):
    project = str(datafiles)
    elements = cli.get_pipeline(project, ['runtimedep.bst'], scope='build')

    # FIXME: The empty line should probably never happen here when there are no results.
    assert elements == ['']
    elements = cli.get_pipeline(project, ['runtimedep.bst'], scope='run')
    assert elements == ['firstdep.bst', 'runtimedep.bst']


@pytest.mark.datafiles(DATA_DIR)
def test_all_dependency(cli, datafiles):
    project = str(datafiles)

    elements = cli.get_pipeline(project, ['alldep.bst'], scope='build')
    assert elements == ['firstdep.bst']

    elements = cli.get_pipeline(project, ['alldep.bst'], scope='run')
    assert elements == ['firstdep.bst', 'alldep.bst']


@pytest.mark.datafiles(DATA_DIR)
def test_list_build_dependency(cli, datafiles):
    project = str(datafiles)

    # Check that the pipeline includes the build dependency
    deps = cli.get_pipeline(project, ['builddep-list.bst'], scope="build")
    assert "firstdep.bst" in deps


@pytest.mark.datafiles(DATA_DIR)
def test_list_runtime_dependency(cli, datafiles):
    project = str(datafiles)

    # Check that the pipeline includes the runtime dependency
    deps = cli.get_pipeline(project, ['runtimedep-list.bst'], scope="run")
    assert "firstdep.bst" in deps


@pytest.mark.datafiles(DATA_DIR)
def test_list_dependencies_combined(cli, datafiles):
    project = str(datafiles)

    # Check that runtime deps get combined
    rundeps = cli.get_pipeline(project, ['list-combine.bst'], scope="run")
    assert "firstdep.bst" not in rundeps
    assert "seconddep.bst" in rundeps
    assert "thirddep.bst" in rundeps

    # Check that build deps get combined
    builddeps = cli.get_pipeline(project, ['list-combine.bst'], scope="build")
    assert "firstdep.bst" in builddeps
    assert "seconddep.bst" not in builddeps
    assert "thirddep.bst" in builddeps


@pytest.mark.datafiles(DATA_DIR)
def test_list_overlap(cli, datafiles):
    project = str(datafiles)

    # Check that dependencies get merged
    rundeps = cli.get_pipeline(project, ['list-overlap.bst'], scope="run")
    assert "firstdep.bst" in rundeps
    builddeps = cli.get_pipeline(project, ['list-overlap.bst'], scope="build")
    assert "firstdep.bst" in builddeps