add no-full-stop rule

src/rules/no-full-stop.ts

@@ -0,0 +1,41 @@
+import { switchOrSeveritySchema } from '../schemas'
+import Schema from '../schema'
+import Rule from '../rule'
+import { RawSchema, AcceptedSchema } from '../types'
+import Document from '../document'
+import Line from '../line'
+
+export default class NoFullStop implements Rule {
+  public readonly name: string = 'no-full-stop'
+
+  public readonly acceptedSchema: AcceptedSchema = switchOrSeveritySchema
+
+  public readonly schema: Schema
+
+  public constructor(rawSchema: RawSchema) {
+    this.schema = new Schema(rawSchema)
+  }
+
+  public async run(document: Document): Promise<void> {
+    document.lines.forEach((line: Line, index: number): void => {
+      const trimmed = line.text.trimEnd()
+      if (trimmed[trimmed.length - 1] === '.') {
+        document.addError(this.name, `Line ends with a full stop.`, {
+          line: index + 1,
+          column: (line.keyword + trimmed).length,
+        })
+      }
+    })
+  }
+
+  public async fix(document: Document): Promise<void> {
+    document.lines.forEach((line: Line, index: number): void => {
+      const trimmed = line.text.trimEnd()
+      if (trimmed[trimmed.length - 1] === '.') {
+        document.lines[index].text = trimmed.substring(0, trimmed.length - 1)
+      }
+    })
+
+    await document.regenerate()
+  }
+}

tests/acceptance/features/no-full-stop.feature

@@ -0,0 +1,46 @@
+Feature: No Full Stop
+
+  Scenario: Contains Full Stop
+    Given the following feature file
+      """
+      Feature: Some feature
+        When I do something
+        Then something has happened.
+      """
+    When Gherklin is ran with the following configuration
+      | rules                     |
+      | {"no-full-stop": "error"} |
+    Then there is 1 files with errors
+    And the errors are
+      | location                  | severity | rule         | message                     |
+      | {"line": 3, "column": 28} | error    | no-full-stop | Line ends with a full stop. |
+
+  Scenario: Contains Full Stop with Trailing Spaces
+
+  If editing this file, be aware that line 26 is supposed to have 3 trailing spaces
+
+    Given the following feature file
+      """
+      Feature: Some feature
+        When I do something
+        Then something has happened.   
+      """
+    When Gherklin is ran with the following configuration
+      | rules                     |
+      | {"no-full-stop": "error"} |
+    Then there is 1 files with errors
+    And the errors are
+      | location                  | severity | rule         | message                     |
+      | {"line": 3, "column": 28} | error    | no-full-stop | Line ends with a full stop. |
+
+  Scenario: Auto fix
+    Given the following feature file
+      """
+      Feature: Some feature
+        When I do something
+        Then something has happened.
+      """
+    When Gherklin is ran with the following configuration
+      | rules                     | fix  |
+      | {"no-full-stop": "error"} | true |
+    Then there are 0 files with errors