"""POST /image Schema Validation.

What this is testing is essentially the business-level validations that we
have codified in our API definition doc for the POST /image endpoint (RAML).

This means required fields, types, and maxlengths submitted in the POST body.

NOTE: This means that the API documentation is ALSO the machine-readable
spec for the API. Changing field definitions will directly affect the
business-level logic. For that reason, theses tests will break if the
API contract (RAML) is changed.
"""

from images.validation import json_schema
from images.validation.schema import json_validators


def test_post_image_validate_success():
    """Successful response is returned when the data is valid."""
    valid_post_image_data = {
        'filename': 'somefilename.png', 'id': 'somefilename.png'}

    response = json_schema.validate(
        data=valid_post_image_data,
        validator=json_validators.POST_IMAGE_VALIDATOR)

    assert response.status == 200


def test_post_image_validate_invalid_filename():
    """Validation fails on invalid filename type."""
    invalid_post_image_data = {'filename': 123, 'id': 'someid.jpg'}

    response = json_schema.validate(
        data=invalid_post_image_data,
        validator=json_validators.POST_IMAGE_VALIDATOR)

    error_message = response.errors.get('message')

    assert response.status == 400
    assert 'filename' in error_message


def test_post_image_validate_required_filename():
    """Validation fails on missing filename."""
    missing_filename_post_image_data = {'id': 'someid.jpg'}

    response = json_schema.validate(
        data=missing_filename_post_image_data,
        validator=json_validators.POST_IMAGE_VALIDATOR)

    error_message = response.errors.get('message')

    assert response.status == 400
    assert 'filename' in error_message


def test_post_image_validate_invalid_id():
    """Validation fails on invalid id type."""
    invalid_post_image_data = {'id': 123, 'filename': 'someid.jpg'}

    response = json_schema.validate(
        data=invalid_post_image_data,
        validator=json_validators.POST_IMAGE_VALIDATOR)

    error_message = response.errors.get('message')

    assert response.status == 400
    assert 'id' in error_message


def test_post_image_validate_required_id():
    """Validation fails on missing id."""
    missing_id_post_image_data = {'filename': 'someid.jpg'}

    response = json_schema.validate(
        data=missing_id_post_image_data,
        validator=json_validators.POST_IMAGE_VALIDATOR)

    error_message = response.errors.get('message')

    assert response.status == 400
    assert 'id' in error_message