Add tests and samples for legacy bash8

This change introduces some basic tests for bash8
checks, including a sample file that is used to verify
checked errors before/in the 0.1.0 release.

Change-Id: Icc8f9889e5539949a6475769d1083cd619c2c79e

bash8/bash8.py

@@ -66,6 +66,10 @@ def print_error(error, line,
         filelineno = fileinput.filelineno()
     global ERRORS
     ERRORS = ERRORS + 1
+    log_error(error, line, filename, filelineno)
+
+
+def log_error(error, line, filename, filelineno):
     print("%s: '%s'" % (error, line.rstrip('\n')))
     print(" - %s: L%s" % (filename, filelineno))
 

bash8/tests/samples/E001_bad.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# E001
+somefunction args  

bash8/tests/samples/E002_bad.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+	echo "E002: Has a tab"

bash8/tests/samples/legacy_sample.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# E020
+function somefunction () {
+	echo "E002: Has a tab"
+
+  echo "E003: Not an indent with multiple of 4"
+}
+
+# E001
+somefunction args  
+
+# E010
+for thing in things
+do
+    run_things thing
+done
+
+while 0
+do
+    run_thing
+done
+
+until 1
+do
+    run_thing
+done
+
+# E011
+if [ 0 ]
+then
+    run_morethings
+else
+    run_otherthings
+fi
+
+# E012
+cat <<EOH
+this heredoc is bad
+
+# E004

bash8/tests/test_bash8.py

@@ -19,7 +19,10 @@ test_bash8
 Tests for `bash8` module.
 """
 
+import mock
+
 from bash8 import bash8
+
 from bash8.tests import base
 
 
@@ -43,3 +46,76 @@ class TestBash8(base.TestCase):
         bash8.register_ignores('E001')
         bash8.check_no_trailing_whitespace("if ")
         self.assertEqual(bash8.ERRORS, 0)
+
+    @mock.patch('bash8.bash8.print_error')
+    def test_while_check_for_do(self, m_print_error):
+        test_line = 'while `do something args`'
+        bash8.check_for_do(test_line)
+
+        m_print_error.assert_called_once_with(
+            'E010: Do not on same line as while', test_line)
+
+
+class TestBash8Samples(base.TestCase):
+    """End to end regression testing of bash8 against script samples."""
+
+    def setUp(self):
+        super(TestBash8Samples, self).setUp()
+        log_error_patcher = mock.patch('bash8.bash8.log_error')
+        self.m_log_error = log_error_patcher.start()
+        self.addCleanup(log_error_patcher.stop)
+
+    def assert_error_found(self, error, lineno):
+        error_found = False
+        for call in self.m_log_error.call_args_list:
+            # unwrap args
+            args = call[0]
+            if (args[0].startswith(error) and
+                lineno == args[3]):
+                error_found = True
+        if not error_found:
+            self.fail('Error %s expected at line %d not found!' %
+                      (error, lineno))
+
+    def test_sample_E001(self):
+        test_file = 'bash8/tests/samples/E001_bad.sh'
+        bash8.check_files(test_file, False)
+
+        self.assert_error_found('E001', 4)
+
+    def test_sample_E002(self):
+        test_file = 'bash8/tests/samples/E002_bad.sh'
+        bash8.check_files(test_file, False)
+
+        self.assert_error_found('E002', 3)
+
+    def test_pre_zero_dot_one_sample_file(self):
+        """Test the sample file with all pre 0.1.0 release checks.
+
+        This is a legacy compatibility check to make sure we still
+        catch the same errors as we did before the first 0.1.0
+        release of the bash8 pypi package. There were no tests
+        before this, so it is our baseline regression check.
+
+        New checks shouldn't need to be added here, and should
+        have their own separate unit test and/or sample file checks.
+        """
+
+        test_file = 'bash8/tests/samples/legacy_sample.sh'
+        bash8.check_files(test_file, False)
+
+        # NOTE(mrodden): E012 actually requires iterating more than one
+        # file to detect at the moment; this is bug
+        expected_errors = [
+            ('E002', 4),
+            ('E003', 6),
+            ('E001', 10),
+            ('E010', 13),
+            ('E010', 18),
+            ('E010', 23),
+            ('E011', 29),
+            ('E020', 3)
+        ]
+
+        for error in expected_errors:
+            self.assert_error_found(*error)

test-requirements.txt

@@ -1,4 +1,5 @@
 hacking>=0.5.6,<0.8
+mock>=1.0
 
 coverage>=3.6
 discover