Enhance absolute version dependency to accept "1.0.0" (#39)

Instead of relying only on a "=" prefix, this enhanced version works by
making sure all "non-absolute" version rangs are not used, e.g. "~", "^".

From the semver Backus-Naur grammar
(https://www.npmjs.com/package/semver) is only missing that a "x" and
"X" can be used instead of "*".

Author: chr1shaefn3r

src/rules/prefer-absolute-version-dependencies.js

@@ -1,16 +1,15 @@
 'use strict';
 
-const areVersRangesValid = require('./../validators/dependency-audit').areVersRangesValid;
+const isVersionAbsolute = require('./../validators/dependency-audit').isVersionAbsolute;
 const LintIssue = require('./../LintIssue');
 const lintId = 'prefer-absolute-version-dependencies';
 const nodeName = 'dependencies';
 const message = 'You are using an invalid version range. Please use absolute versions.';
 const ruleType = 'dependencies-version-range';
 
 const lint = function(packageJsonData, lintType) {
-  const rangeSpecifier = '=';
 
-  if (!areVersRangesValid(packageJsonData, nodeName, rangeSpecifier)) {
+  if (!isVersionAbsolute(packageJsonData, nodeName)) {
     return new LintIssue(lintId, lintType, nodeName, message);
   }
 

src/rules/prefer-absolute-version-devDependencies.js

@@ -1,16 +1,15 @@
 'use strict';
 
-const areVersRangesValid = require('./../validators/dependency-audit').areVersRangesValid;
+const isVersionAbsolute = require('./../validators/dependency-audit').isVersionAbsolute;
 const LintIssue = require('./../LintIssue');
 const lintId = 'prefer-absolute-version-devDependencies';
 const nodeName = 'devDependencies';
 const message = 'You are using an invalid version range. Please use absolute versions.';
 const ruleType = 'devDependencies-version-range';
 
 const lint = function(packageJsonData, lintType) {
-  const rangeSpecifier = '=';
 
-  if (!areVersRangesValid(packageJsonData, nodeName, rangeSpecifier)) {
+  if (!isVersionAbsolute(packageJsonData, nodeName)) {
     return new LintIssue(lintId, lintType, nodeName, message);
   }
 

src/validators/dependency-audit.js

@@ -105,7 +105,39 @@ const areVersRangesValid = function(packageJsonData, nodeName, rangeSpecifier) {
   return rangesValid;
 };
 
+/**
+ * Determines whether or not all dependency versions are absolut
+ * @param  {object} packageJsonData         Valid JSON
+ * @param  {string} nodeName                Name of a node in the package.json file
+ * @return {boolean}                        False if the package has an non-absolute version. True if it is not or the node is missing.
+ */
+const isVersionAbsolute = function(packageJsonData, nodeName) {
+  if (!packageJsonData.hasOwnProperty(nodeName)) {
+    return true;
+  }
+
+  const NOT_FOUND = -1;
+  const firstCharOfStr = 0;
+  let rangesValid = true;
+
+  for (const dependencyName in packageJsonData[nodeName]) {
+    const dependencyVersion = packageJsonData[nodeName][dependencyName];
+
+    if (dependencyVersion.startsWith('^', firstCharOfStr) ||
+      dependencyVersion.startsWith('~', firstCharOfStr) ||
+      dependencyVersion.startsWith('>', firstCharOfStr) ||
+      dependencyVersion.startsWith('<', firstCharOfStr) ||
+      dependencyVersion.indexOf('*') !== NOT_FOUND
+    ) {
+      rangesValid = false;
+    }
+  }
+
+  return rangesValid;
+};
+
 module.exports.hasDependency = hasDependency;
 module.exports.hasDepPrereleaseVers = hasDepPrereleaseVers;
 module.exports.hasDepVersZero = hasDepVersZero;
 module.exports.areVersRangesValid = areVersRangesValid;
+module.exports.isVersionAbsolute = isVersionAbsolute;

tests/unit/rules/prefer-absolute-version-dependenciesTest.js

@@ -34,6 +34,19 @@ describe('prefer-absolute-version-dependencies Unit Tests', function() {
     });
   });
 
+  context('when package.json has node with a valid value', function() {
+    it('LintIssue object should be returned', function() {
+      const packageJsonData = {
+        dependencies: {
+          'gulp-npm-package-json-lint': '1.0.0'
+        }
+      };
+      const response = lint(packageJsonData, 'error');
+
+      response.should.be.true();
+    });
+  });
+
   context('when package.json does not have node', function() {
     it('true should be returned', function() {
       const packageJsonData = {};

tests/unit/rules/prefer-absolute-version-devDependenciesTest.js

@@ -34,6 +34,19 @@ describe('prefer-absolute-version-devDependencies Unit Tests', function() {
     });
   });
 
+  context('when package.json has node with a valid value', function() {
+    it('LintIssue object should be returned', function() {
+      const packageJsonData = {
+        devDependencies: {
+          'gulp-npm-package-json-lint': '1.0.0'
+        }
+      };
+      const response = lint(packageJsonData, 'error');
+
+      response.should.be.true();
+    });
+  });
+
   context('when package.json does not have node', function() {
     it('true should be returned', function() {
       const packageJsonData = {};

tests/unit/validators/dependency-auditTest.js

@@ -477,4 +477,107 @@ describe('dependency-audit Unit Tests', function() {
       });
     });
   });
+
+  describe('isVersionAbsolute method', function() {
+    context('when the node does not exist in the package.json file', function() {
+      it('true should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '^1.0.0',
+            'grunt-npm-package-json-lint': '~2.0.0-beta1',
+            'gulp-npm-package-json-lint': '^2.0.0-rc1'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'devDependencies');
+
+        response.should.be.true();
+      });
+    });
+
+    context('when the node exists in the package.json file, not all versions are absolute', function() {
+      it('with caret versioning false should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '^1.0.0',
+            'gulp-npm-package-json-lint': '^2.0.0-rc1'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'dependencies');
+
+        response.should.be.false();
+      });
+      it('with tilde versioning false should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '~1.0.0',
+            'gulp-npm-package-json-lint': '~2.0.0-rc1'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'dependencies');
+
+        response.should.be.false();
+      });
+      it('with star versioning false should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '1.0.*',
+            'gulp-npm-package-json-lint': '2.*'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'dependencies');
+
+        response.should.be.false();
+      });
+      it('with greater versioning false should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '>1.0.0',
+            'gulp-npm-package-json-lint': '>=2.0.0'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'dependencies');
+
+        response.should.be.false();
+      });
+      it('with greater versioning false should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '>1.0.0',
+            'gulp-npm-package-json-lint': '>=2.0.0'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'dependencies');
+
+        response.should.be.false();
+      });
+      it('with less versioning false should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '<1.0.0',
+            'gulp-npm-package-json-lint': '<=2.0.0'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'dependencies');
+
+        response.should.be.false();
+      });
+    });
+
+    context('when the node exists in the package.json file, all versions are absolute', function() {
+      it('true should be returned', function() {
+        const packageJson = {
+          dependencies: {
+            'npm-package-json-lint': '1.0.0',
+            'grunt-npm-package-json-lint': '2.1.0',
+            'gulp-npm-package-json-lint': '=2.4.0'
+          }
+        };
+        const response = dependencyAudit.isVersionAbsolute(packageJson, 'dependencies');
+
+        response.should.be.true();
+      });
+    });
+
+  });
+
 });