Add tests for config-parser

src/config-parser.test.js

@@ -0,0 +1,158 @@
+const fs = require('fs')
+
+const {ConfigParser} = require('./config-parser')
+const {getTempFolder, compareFiles} = require('./test-helpers')
+
+// Get the temp folder
+const tempFolder = getTempFolder()
+
+// Cases to test
+const cases = [
+  //
+  // Default export
+  //
+
+  {
+    property: 'property',
+    source: `export default {}`,
+    expected: `export default { property: "value" }`
+  },
+  {
+    property: 'property',
+    source: `export default { property: 0 }`, // property exists and is a number
+    expected: `export default { property: "value" }`
+  },
+  {
+    property: 'property',
+    source: `export default { property: false }`, // property exists and is a boolean
+    expected: `export default { property: "value" }`
+  },
+  {
+    property: 'property',
+    source: `export default { property: "test" }`, // property exists and is a string
+    expected: `export default { property: "value" }`
+  },
+  {
+    property: 'property',
+    source: `export default { property: [1,2] }`, // property exists and is an array
+    expected: `export default { property: "value" }`
+  },
+  {
+    property: 'property',
+    source: `export default { property: null }`, // property exists and is null
+    expected: `export default { property: "value" }`
+  },
+  {
+    property: 'property',
+    source: `export default { property: {}}`, // property exists and is an object
+    expected: `export default { property: "value" }`
+  },
+
+  // Deep properties (injection 1)
+  {
+    property: 'property.b.c',
+    source: `export default {}`,
+    expected: `export default { property: { b: { c: "value" }}}`
+  },
+  {
+    property: 'property.b.c',
+    source: `export default { property: 0 }`, // property exists and is a number
+    expected: `export default { property: { b: { c: "value" }}}`
+  },
+  {
+    property: 'property.b.c',
+    source: `export default { property: {}}`, // property exists and is an object
+    expected: `export default { property: { b: { c: "value" }}}`
+  },
+
+  // Deep properties (injection 2)
+  {
+    property: 'property.b.c',
+    source: `export default { property: { b: 0 }}`, // property exists and is a number
+    expected: `export default { property: { b: { c: "value" }}}`
+  },
+  {
+    property: 'property.b.c',
+    source: `export default { property: { b: {}}}`, // property exists and is an object
+    expected: `export default { property: { b: { c: "value" }}}`
+  },
+  {
+    property: 'property.b.c',
+    source: `export default { property: { b: { hello: 123}}}`, // property exists and is a non-empty object
+    expected: `export default { property: { b: { c: "value", hello: 123 }}}`
+  },
+
+  // Deep properties (existing properties)
+  {
+    property: 'a1.a2',
+    source: `export default { a2: false, a1: { a3: [12]}}`, // property exists and is a non-empty object
+    expected: `export default { a2: false, a1: { a2: "value", a3: [12]}}`
+  },
+
+  //
+  // Direct module exports
+  //
+  {
+    property: 'property',
+    source: `module.exports = {}`,
+    expected: `module.exports = { property: "value"}`
+  },
+  {
+    property: 'property',
+    source: `module.exports = { p1: 0}`,
+    expected: `module.exports = { property: "value", p1: 0}`
+  },
+  {
+    property: 'a.b.c',
+    source: `module.exports = { p1: 0}`,
+    expected: `module.exports = { a: { b: { c: "value" }}, p1: 0}`
+  },
+
+  //
+  // Indirect module exports
+  //
+  {
+    property: 'property',
+    source: `const config = {}; module.exports = config`,
+    expected: `const config = { property: "value"}; module.exports = config`
+  },
+  {
+    property: 'property',
+    source: `var config = {}; module.exports = config`,
+    expected: `var config = { property: "value"}; module.exports = config`
+  },
+  {
+    property: 'a.b.c',
+    source: `var config = {}; module.exports = config`,
+    expected: `var config = { a: { b: { c: "value"}}}; module.exports = config`
+  },
+  {
+    property: 'a.b.c',
+    source: `var config = { a: { b: [], c: "hello"}}; module.exports = config`,
+    expected: `var config = { a: { b: { c: "value"}, c: "hello"}}; module.exports = config`
+  },
+]
+
+describe('config-parser', () => {
+  cases.forEach(({property, source, expected}, index) => {
+    it(`Inject path properly for case #${index}`, () => {
+      // Write the source file
+      const sourceFile = `${tempFolder}/source.js`
+      fs.writeFileSync(sourceFile, source, {encoding: 'utf8'})
+
+      // Write the expected file
+      const expectedFile = `${tempFolder}/expected.js`
+      fs.writeFileSync(expectedFile, expected, {encoding: 'utf8'})
+
+      // Update the settings and do the injection
+      new ConfigParser({
+        configurationFile: sourceFile,
+        propertyName: property,
+        propertyValue: 'value'
+      }).inject()
+
+      // Compare the files
+      compareFiles(sourceFile, expectedFile)
+    })
+  })
+})