Merge pull request #256 from staticdev/update-error-status-code

Update error status code

.github/workflows/constraints.txt

@@ -1,3 +1,4 @@
-pip==20.3.3
-nox==2020.12.31
-poetry==1.1.4
+pip==20.2.4
+nox==2020.8.22
+poetry==1.1.2
+virtualenv==20.2.1

pyproject.toml

@@ -25,7 +25,6 @@ flake8 = "^3.8.4"
 flake8-bandit = "^2.1.2"
 flake8-bugbear = "^20.11.1"
 safety = "^1.10.2"
-mypy = "^0.790"
 pytest-mock = "^3.5.1"
 typeguard = "^2.10.0"
 pre-commit = "^2.9.3"
@@ -39,6 +38,7 @@ flake8-rst-docstrings = "^0.0.14"
 pep8-naming = "^0.11.1"
 pre-commit-hooks = "^3.4.0"
 reorder-python-imports = "^2.3.6"
+mypy = "0.782"
 
 [tool.poetry.scripts]
 toml-validator = "toml_validator.__main__:main"

src/toml_validator/__main__.py

@@ -1,4 +1,6 @@
 """Command-line interface."""
+import sys
+
 import click
 
 from . import validation
@@ -8,14 +10,25 @@
 @click.argument("filename", type=click.Path(exists=True))
 @click.version_option()
 def main(filename: str) -> None:
-    """Makes validations and echos errors if found."""
+    """Makes validations and echos errors if found.
+
+    Args:
+        filename: name of validated file.
+
+    Return status:
+    * 0: no errors found
+    * 1: incorrect usage
+    * 2: invalid path
+    * 3: errors found
+    """
     validation.validate_extension(filename)
 
     click.secho("Reading file {}.".format(filename), fg="blue")
 
     errors = validation.validate_toml(filename)
     if errors:
         click.secho("Error(s) found: {}.".format(errors), fg="red")
+        sys.exit(3)
     else:
         click.secho("No problems found parsing file {}!".format(filename), fg="green")
 

tests/test_main.py

@@ -60,7 +60,22 @@ def test_main_with_argument_success(
         assert result.exit_code == 0
 
 
-def test_main_with_argument_fail(
+def test_main_with_invalid_path(
+    runner: click.testing.CliRunner,
+    mock_validation_validate_extension: Mock,
+    mock_validation_validate_toml_with_error: Mock,
+) -> None:
+    """It outputs error."""
+    with runner.isolated_filesystem():
+        with open("file.toml", "w") as f:
+            f.write("content doesnt matter")
+
+        result = runner.invoke(__main__.main, ["file.to"])
+        assert result.output.startswith("Usage:")
+        assert result.exit_code == 2
+
+
+def test_main_with_errors(
     runner: click.testing.CliRunner,
     mock_validation_validate_extension: Mock,
     mock_validation_validate_toml_with_error: Mock,
@@ -74,7 +89,7 @@ def test_main_with_argument_fail(
         assert result.output == (
             "Reading file file.toml.\n" "Error(s) found: |some error description|.\n"
         )
-        assert result.exit_code == 0
+        assert result.exit_code == 3
 
 
 @pytest.mark.e2e