fix: convert strings to numbers, closes #350

Author: bahmutov

src/index.js

@@ -194,7 +194,7 @@ function cypressSplit(on, config, userSpecOrderFn = undefined) {
     }
 
     on('after:run', () => {
-      if (SPLIT_FILE) {
+      if (SPLIT_FILE && SPLIT_OUTPUT_FILE) {
         console.log('%s here are passing spec timings', label)
 
         const specDurations = batchSpecs

src/parse-inputs.js

@@ -5,6 +5,18 @@ const { getSpecs } = require('find-cypress-specs')
 const globby = require('globby')
 const { createShuffle } = require('fast-shuffle')
 
+/**
+ * @typedef {Object} ParsedSplitInputs
+ * @property {number} SPLIT
+ * @property {number} SPLIT_INDEX
+ * @property {string|undefined} SPLIT_FILE
+ * @property {string|undefined} SPLIT_OUTPUT_FILE
+ * @property {string|undefined} ciName
+ */
+
+/**
+ * @returns {ParsedSplitInputs}
+ */
 function parseSplitInputs(env = {}, configEnv = {}) {
   let SPLIT = env.SPLIT || configEnv.split || configEnv.SPLIT
   let SPLIT_INDEX = env.SPLIT_INDEX || configEnv.splitIndex
@@ -55,6 +67,14 @@ function parseSplitInputs(env = {}, configEnv = {}) {
     }
   }
 
+  // convert values that should be numbers
+  if (typeof SPLIT === 'string') {
+    SPLIT = Number(SPLIT)
+  }
+  if (typeof SPLIT_INDEX === 'string') {
+    SPLIT_INDEX = Number(SPLIT_INDEX)
+  }
+
   return { SPLIT, SPLIT_INDEX, SPLIT_FILE, SPLIT_OUTPUT_FILE, ciName }
 }
 

test/parse-inputs.test.js

@@ -1,12 +1,22 @@
 const test = require('ava')
 const path = require('path')
-const { getSpecsToSplit } = require('../src/parse-inputs')
+const { getSpecsToSplit, parseSplitInputs } = require('../src/parse-inputs')
 
 function toRelative(filenames) {
   const cwd = process.cwd()
   return filenames.map((filename) => path.relative(cwd, filename))
 }
 
+test('parseSplitInputs converts strings to numbers', (t) => {
+  const inputs = parseSplitInputs({
+    SPLIT: '1',
+    SPLIT_INDEX: '2',
+  })
+
+  t.is(inputs.SPLIT, 1)
+  t.is(inputs.SPLIT_INDEX, 2)
+})
+
 test('getSpecsToSplit spec pattern', (t) => {
   const specs = getSpecsToSplit({
     SPEC: 'cypress/spec-a.js,cypress/integration/spec-b.js',