Add MD050/strong-style (fixes #150).

.eslintignore

@@ -4,3 +4,4 @@ demo/markdownlint-browser.min.js
 demo/markdownlint-rule-helpers-browser.js
 demo/markdownlint-rule-helpers-browser.min.js
 example/typescript/type-check.js
+test-repos/

README.md

@@ -102,6 +102,7 @@ playground for learning and exploring.
 * **[MD046](doc/Rules.md#md046)** *code-block-style* - Code block style
 * **[MD047](doc/Rules.md#md047)** *single-trailing-newline* - Files should end with a single newline character
 * **[MD048](doc/Rules.md#md048)** *code-fence-style* - Code fence style
+* **[MD050](doc/Rules.md#md050)** *strong-style* - Strong style should be consistent
 
 <!-- markdownlint-restore -->
 
@@ -125,7 +126,7 @@ rules at once.
 * **blockquote** - MD027, MD028
 * **bullet** - MD004, MD005, MD006, MD007, MD032
 * **code** - MD014, MD031, MD038, MD040, MD046, MD048
-* **emphasis** - MD036, MD037
+* **emphasis** - MD036, MD037, MD050
 * **hard_tab** - MD010
 * **headers** - MD001, MD002, MD003, MD018, MD019, MD020, MD021, MD022,
   MD023, MD024, MD025, MD026, MD036, MD041, MD043

demo/markdownlint-browser.js

@@ -190,6 +190,21 @@ module.exports.fencedCodeBlockStyleFor =
                 return "backtick";
         }
     };
+/**
+ * Return the string representation of a emphasis or strong markup character.
+ *
+ * @param {string} markup Emphasis or strong string.
+ * @returns {string} String representation.
+ */
+module.exports.emphasisOrStrongStyleFor =
+    function emphasisOrStrongStyleFor(markup) {
+        switch (markup[0]) {
+            case "*":
+                return "asterisk";
+            default:
+                return "underscore";
+        }
+    };
 /**
  * Return the number of characters of indent for a token.
  *
@@ -4024,6 +4039,36 @@ module.exports = {
 };
 
 
+/***/ }),
+
+/***/ "../lib/md050.js":
+/*!***********************!*\
+  !*** ../lib/md050.js ***!
+  \***********************/
+/***/ ((module, __unused_webpack_exports, __webpack_require__) => {
+
+"use strict";
+// @ts-check
+
+var _a = __webpack_require__(/*! ../helpers */ "../helpers/helpers.js"), addErrorDetailIf = _a.addErrorDetailIf, emphasisOrStrongStyleFor = _a.emphasisOrStrongStyleFor, forEachInlineChild = _a.forEachInlineChild;
+module.exports = {
+    "names": ["MD050", "strong-style"],
+    "description": "Strong style should be consistent",
+    "tags": ["emphasis"],
+    "function": function MD050(params, onError) {
+        var expectedStyle = String(params.config.style || "consistent");
+        forEachInlineChild(params, "strong_open", function (token) {
+            var lineNumber = token.lineNumber, markup = token.markup;
+            var markupStyle = emphasisOrStrongStyleFor(markup);
+            if (expectedStyle === "consistent") {
+                expectedStyle = markupStyle;
+            }
+            addErrorDetailIf(onError, lineNumber, expectedStyle, markupStyle);
+        });
+    }
+};
+
+
 /***/ }),
 
 /***/ "../lib/rules.js":
@@ -4082,7 +4127,8 @@ var rules = [
     __webpack_require__(/*! ./md045 */ "../lib/md045.js"),
     __webpack_require__(/*! ./md046 */ "../lib/md046.js"),
     __webpack_require__(/*! ./md047 */ "../lib/md047.js"),
-    __webpack_require__(/*! ./md048 */ "../lib/md048.js")
+    __webpack_require__(/*! ./md048 */ "../lib/md048.js"),
+    __webpack_require__(/*! ./md050 */ "../lib/md050.js")
 ];
 rules.forEach(function (rule) {
     var name = rule.names[0].toLowerCase();

doc/Rules.md

@@ -1911,3 +1911,33 @@ The configured list style can be a specific symbol to use (backtick, tilde), or
 can require that usage be consistent within the document.
 
 Rationale: Consistent formatting makes it easier to understand a document.
+
+<a name="md050"></a>
+
+## MD050 - Strong style should be consistent
+
+Tags: emphasis
+
+Aliases: strong-style
+
+Parameters: style ("consistent", "asterisk", "underscore"; default "consistent")
+
+This rule is triggered when the symbols used in the document for strong do not
+match the configured strong style:
+
+```markdown
+**Text**
+__Text__
+```
+
+To fix this issue, use the configured strong style throughout the document:
+
+```markdown
+**Text**
+**Text**
+```
+
+The configured strong style can be a specific symbol to use ("asterisk",
+"underscore"), or can require that usage be consistent within the document.
+
+Rationale: Consistent formatting makes it easier to understand a document.

helpers/helpers.js

@@ -181,6 +181,22 @@ module.exports.fencedCodeBlockStyleFor =
     }
   };
 
+/**
+ * Return the string representation of a emphasis or strong markup character.
+ *
+ * @param {string} markup Emphasis or strong string.
+ * @returns {string} String representation.
+ */
+module.exports.emphasisOrStrongStyleFor =
+  function emphasisOrStrongStyleFor(markup) {
+    switch (markup[0]) {
+      case "*":
+        return "asterisk";
+      default:
+        return "underscore";
+    }
+  };
+
 /**
  * Return the number of characters of indent for a token.
  *

lib/md050.js

@@ -0,0 +1,28 @@
+// @ts-check
+
+"use strict";
+
+const { addErrorDetailIf, emphasisOrStrongStyleFor, forEachInlineChild } =
+  require("../helpers");
+
+module.exports = {
+  "names": [ "MD050", "strong-style" ],
+  "description": "Strong style should be consistent",
+  "tags": [ "emphasis" ],
+  "function": function MD050(params, onError) {
+    let expectedStyle = String(params.config.style || "consistent");
+    forEachInlineChild(params, "strong_open", (token) => {
+      const { lineNumber, markup } = token;
+      const markupStyle = emphasisOrStrongStyleFor(markup);
+      if (expectedStyle === "consistent") {
+        expectedStyle = markupStyle;
+      }
+      addErrorDetailIf(
+        onError,
+        lineNumber,
+        expectedStyle,
+        markupStyle
+      );
+    });
+  }
+};

lib/rules.js

@@ -50,7 +50,8 @@ const rules = [
   require("./md045"),
   require("./md046"),
   require("./md047"),
-  require("./md048")
+  require("./md048"),
+  require("./md050")
 ];
 rules.forEach((rule) => {
   const name = rule.names[0].toLowerCase();

schema/.markdownlint.jsonc

@@ -248,5 +248,11 @@
   "MD048": {
     // Code fence style
     "style": "consistent"
+  },
+
+  // MD050/strong-style - Strong style should be consistent
+  "MD050": {
+    // Strong style should be consistent
+    "style": "consistent"
   }
 }

schema/.markdownlint.yaml

@@ -224,4 +224,9 @@ MD047: true
 # MD048/code-fence-style - Code fence style
 MD048:
   # Code fence style
+  style: "consistent"
+
+# MD050/strong-style - Strong style should be consistent
+MD050:
+  # Strong style should be consistent
   style: "consistent"

schema/build-config-schema.js

@@ -396,6 +396,20 @@ rules.forEach(function forRule(rule) {
         }
       };
       break;
+    case "MD050":
+      scheme.properties = {
+        "style": {
+          "description": "Strong style should be consistent",
+          "type": "string",
+          "enum": [
+            "consistent",
+            "asterisk",
+            "underscore"
+          ],
+          "default": "consistent"
+        }
+      };
+      break;
     default:
       custom = false;
       break;

schema/markdownlint-config-schema.json

@@ -1439,6 +1439,48 @@
       },
       "additionalProperties": false
     },
+    "MD050": {
+      "description": "MD050/strong-style - Strong style should be consistent",
+      "type": [
+        "boolean",
+        "object"
+      ],
+      "default": true,
+      "properties": {
+        "style": {
+          "description": "Strong style should be consistent",
+          "type": "string",
+          "enum": [
+            "consistent",
+            "asterisk",
+            "underscore"
+          ],
+          "default": "consistent"
+        }
+      },
+      "additionalProperties": false
+    },
+    "strong-style": {
+      "description": "MD050/strong-style - Strong style should be consistent",
+      "type": [
+        "boolean",
+        "object"
+      ],
+      "default": true,
+      "properties": {
+        "style": {
+          "description": "Strong style should be consistent",
+          "type": "string",
+          "enum": [
+            "consistent",
+            "asterisk",
+            "underscore"
+          ],
+          "default": "consistent"
+        }
+      },
+      "additionalProperties": false
+    },
     "headings": {
       "description": "headings - MD001, MD002, MD003, MD018, MD019, MD020, MD021, MD022, MD023, MD024, MD025, MD026, MD036, MD041, MD043",
       "type": "boolean",
@@ -1535,7 +1577,7 @@
       "default": true
     },
     "emphasis": {
-      "description": "emphasis - MD036, MD037",
+      "description": "emphasis - MD036, MD037, MD050",
       "type": "boolean",
       "default": true
     },

test/break-all-the-rules.md

@@ -85,4 +85,8 @@ markdownLint {MD044}
 ![](image.jpg) {MD045}
 ## Heading 10 {MD022}
 
+Strong __with__ underscore style
+
+Strong **with** different style {MD050}
+
 EOF {MD047}

test/emphasis_instead_of_headings.md

@@ -9,7 +9,7 @@ Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore
 eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt
 in culpa qui officia deserunt mollit anim id est laborum.
 
-__Section 1.1: another section {MD036}__
+__Section 1.1: another section {MD036} {MD050}__
 
 Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor
 incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis

test/fix_102_extra_nodes_in_link_text.md

@@ -6,5 +6,5 @@
 [test *test* *test* test](www.test.com)
 [test *test* *test* *test* test](www.test.com)
 [test **test** test](www.test.com)
-[test __test__ test](www.test.com)
+[test __test__ test](www.test.com) {MD050}
 [this should not raise](www.shouldnotraise.com)

test/long_lines.md

@@ -36,7 +36,7 @@ _[This long line is comprised of an emphasized link](https://example.com "This i
 
 **[This long line is comprised of a bolded link](https://example.com "This is the long link's title")**
 
-__[This long line is comprised of a bolded link](https://example.com "This is the long link's title")__
+__[This long line is comprised of a bolded link {MD050}](https://example.com "This is the long link's title")__
 
 _**[This long line is comprised of an emphasized and bolded link](https://example.com "This is the long link's title")**_
 

test/markdownlint-test-repos.js

@@ -71,7 +71,13 @@ function lintTestRepo(t, globPatterns, configPath) {
 
 test("https://github.com/eslint/eslint", (t) => {
   const rootDir = "./test-repos/eslint-eslint";
-  const globPatterns = [ join(rootDir, "docs/**/*.md") ];
+  const globPatterns = [
+    join(rootDir, "docs/**/*.md"),
+    "!" + join(
+      rootDir,
+      "docs/rules/array-callback-return.md"
+    )
+  ];
   const configPath = join(rootDir, ".markdownlint.yml");
   return lintTestRepo(t, globPatterns, configPath);
 });
@@ -134,7 +140,17 @@ if (existsSync(dotnetDocsDir)) {
     const rootDir = dotnetDocsDir;
     const globPatterns = [
       join(rootDir, "**/*.md"),
-      "!" + join(rootDir, "samples/**/*.md")
+      "!" + join(rootDir, "samples/**/*.md"),
+      "!" + join(
+        rootDir,
+        "docs/framework/data/adonet/dataset-datatable-dataview" +
+          "/security-guidance.md"
+      ),
+      "!" + join(rootDir, "docs/standard/native-interop/best-practices.md"),
+      "!" + join(
+        rootDir,
+        "docs/standard/serialization/binaryformatter-security-guide.md"
+      )
     ];
     const configPath = join(rootDir, ".markdownlint.json");
     return lintTestRepo(t, globPatterns, configPath);

test/markdownlint-test.js

@@ -492,8 +492,9 @@ test.cb("styleAll", (t) => {
         "MD042": [ 81 ],
         "MD045": [ 85 ],
         "MD046": [ 49, 73, 77 ],
-        "MD047": [ 88 ],
+        "MD047": [ 92 ],
-        "MD048": [ 77 ]
+        "MD048": [ 77 ],
+        "MD050": [ 90 ]
       }
     };
     // @ts-ignore
@@ -535,8 +536,9 @@ test.cb("styleRelaxed", (t) => {
         "MD042": [ 81 ],
         "MD045": [ 85 ],
         "MD046": [ 49, 73, 77 ],
-        "MD047": [ 88 ],
+        "MD047": [ 92 ],
-        "MD048": [ 77 ]
+        "MD048": [ 77 ],
+        "MD050": [ 90 ]
       }
     };
     // @ts-ignore
@@ -837,7 +839,7 @@ test.cb("customFileSystemAsync", (t) => {
   });
 });
 test.cb("readme", (t) => {
-  t.plan(115);
+  t.plan(117);
   const tagToRules = {};
   rules.forEach(function forRule(rule) {
     rule.tags.forEach(function forTag(tag) {
@@ -913,7 +915,7 @@ test.cb("readme", (t) => {
 });
 
 test.cb("rules", (t) => {
-  t.plan(336);
+  t.plan(344);
   fs.readFile("doc/Rules.md", "utf8",
     (err, contents) => {
       t.falsy(err);
@@ -1566,7 +1568,7 @@ test.cb("configBadFilePromise", (t) => {
 });
 
 test("allBuiltInRulesHaveValidUrl", (t) => {
-  t.plan(132);
+  t.plan(135);
   rules.forEach(function forRule(rule) {
     t.truthy(rule.information);
     t.true(Object.getPrototypeOf(rule.information) === URL.prototype);

test/mixed-emphasis-markers.md

@@ -8,10 +8,10 @@ This paragraph *nests both _kinds_ of emphasis* marker.
 
 This paragraph *nests both __kinds__ of emphasis* marker.
 
-This paragraph **nests both __kinds__ of emphasis** marker.
+This paragraph **nests both __kinds__ of emphasis** marker. {MD050}
 
 This paragraph _nests both *kinds* of emphasis_ marker.
 
-This paragraph _nests both **kinds** of emphasis_ marker.
+This paragraph _nests both **kinds** of emphasis_ marker. {MD050}
 
-This paragraph __nests both **kinds** of emphasis__ marker.
+This paragraph __nests both **kinds** of emphasis__ marker. {MD050}

test/spaces_inside_emphasis_markers.md

@@ -1,5 +1,7 @@
 # Heading
 
+<!-- markdownlint-disable-file strong-style -->
+
 Line with *Normal emphasis*
 
 Line with **Normal strong**

test/strong_style_asterisk.json

@@ -0,0 +1,6 @@
+{
+  "default": true,
+  "MD050": {
+    "style": "asterisk"
+  }
+}

test/strong_style_asterisk.md

@@ -0,0 +1,5 @@
+# Strong style asterisk
+
+This is **fine**
+
+This is __not__ {MD050}

test/strong_style_underscore.json

@@ -0,0 +1,6 @@
+{
+  "default": true,
+  "MD050": {
+    "style": "underscore"
+  }
+}

test/strong_style_underscore.md

@@ -0,0 +1,5 @@
+# Strong style underscore
+
+This is __fine__
+
+This is **not** {MD050}