Add tests with 'vim-flavor'

t/test_ftdetect.vim

@@ -0,0 +1,43 @@
+filetype plugin on
+runtime! plugin/requirements.vim
+
+describe 'enable: requirements#matched_filename()'
+    it 'to enable file type detection: basic filename'
+        Expect requirements#matched_filename('requirements.txt') to_be_true
+        Expect requirements#matched_filename('requires.txt') to_be_true
+    end
+
+    it 'to enable file type detection: pip-tools filename'
+        Expect requirements#matched_filename('requirements.in') to_be_true
+        Expect requirements#matched_filename('requires.in') to_be_true
+    end
+
+    it 'to enable file type detection: directory structure'
+        Expect requirements#matched_filename('requirements/dev.txt') to_be_true
+        Expect requirements#matched_filename('requires/tests.in') to_be_true
+    end
+end
+
+describe 'disable: requirements#matched_filename()'
+    it 'to enable file type detection: basic filename'
+        Expect requirements#matched_filename('requirements.text') to_be_false
+    end
+
+    it 'to enable file type detection: pip-tools filename'
+        Expect requirements#matched_filename('requirements.ini') to_be_false
+    end
+
+    it 'to enable file type detection: directory structure'
+        Expect requirements#matched_filename('require/dev.txt') to_be_false
+    end
+end
+
+describe 'g:requirements#detect_filename_pattern'
+    it 'use g:requirements#detect_filename_pattern'
+        Expect requirements#matched_filename('freeze.txt') to_be_false
+        let g:requirements#detect_filename_pattern = 'freeze'
+        Expect requirements#matched_filename('freeze.txt') to_be_true
+    end
+end
+
+" vim: et sw=4 ts=4 sts=4: