Allow _guess_delimiter to work with a single row of data

.editorconfig

@@ -14,5 +14,8 @@ insert_final_newline = true
 [composer.json]
 indent_size = 4
 
-[.travis.yml]
+[Makefile]
+indent_style = tab
+
+[*.yml,*.yaml]
 indent_size = 2

.github/workflows/ci.yml

@@ -0,0 +1,38 @@
+---
+name: CI
+on:
+  push:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php_version:
+          - "7.4"
+          - "7.3"
+          - "7.2"
+          - "7.1"
+    steps:
+      - uses: actions/checkout@v2
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php_version }}
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+      - name: Cache composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+      - name: Install dependencies
+        run: composer update
+      - name: Validate dependencies
+        run: composer validate
+      - name: Run tests
+        run: vendor/bin/phpunit --configuration tests/phpunit.xml

Makefile

@@ -11,5 +11,21 @@ phpunit-dep:
 		exit 1 \
 	)
 
+# Requires:
+# - Docker: https://docker.com
+# - act: https://github.com/nektos/act
+local-ci:
+ifeq (, $(shell which act))
+define ACT_ERROR
+Consider running the following to install 'act':
+
+   curl https://raw.githubusercontent.com/nektos/act/master/install.sh | sudo bash
+
+The dependency 'act' was not found
+endef
+$(error ${ACT_ERROR})
+endif
+	act -P ubuntu-latest=shivammathur/node:latest -W .github/workflows/ci.yml
+
 .SILENT:
-.PHONY: test phpunit-dep
+.PHONY: test phpunit-dep local-ci

README.md

@@ -165,8 +165,12 @@ composer install
 composer run test
 ````
 
-When pushing code to GitHub, tests will be executed using Travis CI. The relevant configuration is in the
-file `.travis.yml`.
+When pushing code to GitHub, tests will be executed using GitHub Actions. The relevant configuration is in the
+file `.github/workflows/ci.yml`. To run the `test` action locally, you can execute the following command:
+
+````bash
+make local-ci
+````
 
 ## Security
 

src/Csv.php

@@ -1248,7 +1248,7 @@ protected function _check_count($char, $array, $depth, $preferred) {
             $first = null;
             $equal = null;
             $almost = false;
-            foreach ($array as $key => $value) {
+            foreach ($array as $value) {
                 if ($first == null) {
                     $first = $value;
                 } elseif ($value == $first && $equal !== false) {
@@ -1261,7 +1261,7 @@ protected function _check_count($char, $array, $depth, $preferred) {
                 }
             }
 
-            if ($equal) {
+            if ($equal || $depth === 1) {
                 $match = $almost ? 2 : 1;
                 $pref = strpos($preferred, $char);
                 $pref = ($pref !== false) ? str_pad($pref, 3, '0', STR_PAD_LEFT) : '999';
@@ -1405,7 +1405,7 @@ protected function _guess_delimiter($search_depth, $preferred, $enclosure, $data
             $is_newline = ($ch == "\n" && $pch != "\r") || $ch == "\r";
             if ($ch == $enclosure) {
                 if (!$enclosed || $nch != $enclosure) {
-                    $enclosed = $enclosed ? false : true;
+                    $enclosed = !$enclosed;
                 } elseif ($enclosed) {
                     $i++;
                 }

tests/example_files/single_row.csv

@@ -0,0 +1 @@
+C1,C2,C3

tests/methods/ParseTest.php

@@ -121,6 +121,15 @@ public function testSingleColumn() {
         self::assertEquals($expected, $this->csv->data);
     }
 
+    public function testSingleRow() {
+        $this->csv->auto(__DIR__ . '/../example_files/single_row.csv');
+        self::assertEquals([], $this->csv->data, 'Single row is detected as header');
+        $this->csv->heading = false;
+        $this->csv->auto(__DIR__ . '/../example_files/single_row.csv');
+        $expected = [['C1', 'C2', 'C3']];
+        self::assertEquals($expected, $this->csv->data);
+    }
+
     public function testMatomoData() {
         // Matomo (Piwik) export cannot be read with
         $this->csv->use_mb_convert_encoding = true;