Add regression tests from cmark and commonmark.js

CHANGELOG.md

@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
 with the exception that 0.x versions can break between minor versions.
 
+## Unreleased
+### Changed
+- Parse backslash followed by unescapable character the same way as
+  the reference implementations.
+### Fixed
+- Fix tab handling in ATX and Setext headings.
+
 ## [0.11.0] - 2018-01-17
 ### Added
 - The extension for tables now also renders to plain text

commonmark-android-test/app/src/androidTest/java/com/atlassian/commonmark/android/test/AndroidSupportTest.java

@@ -10,7 +10,7 @@
 import org.commonmark.node.Node;
 import org.commonmark.parser.Parser;
 import org.commonmark.renderer.html.HtmlRenderer;
-import org.commonmark.testutil.spec.SpecReader;
+import org.commonmark.testutil.TestResources;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -30,7 +30,7 @@ public class AndroidSupportTest {
 
     @Before
     public void setUp() throws Exception {
-        spec = SpecReader.readSpec();
+        spec = TestResources.readAsString(TestResources.getSpec());
     }
 
     @Test

commonmark-integration-test/src/test/java/org/commonmark/integration/BoundsIntegrationTest.java

@@ -2,8 +2,9 @@
 
 import org.commonmark.node.Node;
 import org.commonmark.parser.Parser;
-import org.commonmark.testutil.spec.SpecExample;
-import org.commonmark.testutil.spec.SpecReader;
+import org.commonmark.testutil.TestResources;
+import org.commonmark.testutil.example.Example;
+import org.commonmark.testutil.example.ExampleReader;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -29,9 +30,9 @@ public BoundsIntegrationTest(String input) {
 
     @Parameterized.Parameters(name = "{0}")
     public static List<Object[]> data() {
-        List<SpecExample> examples = SpecReader.readExamples();
+        List<Example> examples = ExampleReader.readExamples(TestResources.getSpec());
         List<Object[]> data = new ArrayList<>();
-        for (SpecExample example : examples) {
+        for (Example example : examples) {
             data.add(new Object[]{example.getSource()});
         }
         return data;

commonmark-integration-test/src/test/java/org/commonmark/integration/PegDownBenchmark.java

@@ -1,6 +1,7 @@
 package org.commonmark.integration;
 
-import org.commonmark.testutil.spec.SpecReader;
+import org.commonmark.testutil.TestResources;
+import org.commonmark.testutil.example.ExampleReader;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.Scope;
 import org.openjdk.jmh.annotations.State;
@@ -17,8 +18,8 @@
 @State(Scope.Benchmark)
 public class PegDownBenchmark {
 
-    private static final String SPEC = SpecReader.readSpec();
-    private static final List<String> SPEC_EXAMPLES = SpecReader.readExamplesAsString();
+    private static final String SPEC = TestResources.readAsString(TestResources.getSpec());
+    private static final List<String> SPEC_EXAMPLES = ExampleReader.readExampleSources(TestResources.getSpec());
     private static final PegDownProcessor PROCESSOR = new PegDownProcessor(Extensions.FENCED_CODE_BLOCKS);
 
     public static void main(String[] args) throws Exception {

commonmark-integration-test/src/test/java/org/commonmark/integration/SpecIntegrationTest.java

@@ -8,7 +8,7 @@
 import org.commonmark.ext.front.matter.YamlFrontMatterExtension;
 import org.commonmark.renderer.html.HtmlRenderer;
 import org.commonmark.parser.Parser;
-import org.commonmark.testutil.spec.SpecExample;
+import org.commonmark.testutil.example.Example;
 import org.commonmark.testutil.SpecTestCase;
 import org.junit.Test;
 
@@ -30,7 +30,7 @@ public class SpecIntegrationTest extends SpecTestCase {
     private static final HtmlRenderer RENDERER = HtmlRenderer.builder().extensions(EXTENSIONS).percentEncodeUrls(true).build();
     private static final Map<String, String> OVERRIDDEN_EXAMPLES = getOverriddenExamples();
 
-    public SpecIntegrationTest(SpecExample example) {
+    public SpecIntegrationTest(Example example) {
         super(example);
     }
 

commonmark-test-util/src/main/java/org/commonmark/testutil/SpecTestCase.java

@@ -1,7 +1,7 @@
 package org.commonmark.testutil;
 
-import org.commonmark.testutil.spec.SpecExample;
-import org.commonmark.testutil.spec.SpecReader;
+import org.commonmark.testutil.example.Example;
+import org.commonmark.testutil.example.ExampleReader;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -13,17 +13,17 @@
 @RunWith(Parameterized.class)
 public abstract class SpecTestCase extends RenderingTestCase {
 
-    protected final SpecExample example;
+    protected final Example example;
 
-    public SpecTestCase(SpecExample example) {
+    public SpecTestCase(Example example) {
         this.example = example;
     }
 
     @Parameters(name = "{0}")
     public static List<Object[]> data() {
-        List<SpecExample> examples = SpecReader.readExamples();
+        List<Example> examples = ExampleReader.readExamples(TestResources.getSpec());
         List<Object[]> data = new ArrayList<>();
-        for (SpecExample example : examples) {
+        for (Example example : examples) {
             data.add(new Object[]{example});
         }
         return data;

commonmark-test-util/src/main/java/org/commonmark/testutil/TestResources.java

@@ -0,0 +1,37 @@
+package org.commonmark.testutil;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.nio.charset.Charset;
+import java.util.Arrays;
+import java.util.List;
+
+public class TestResources {
+
+    public static URL getSpec() {
+        return TestResources.class.getResource("/spec.txt");
+    }
+
+    public static List<URL> getRegressions() {
+        return Arrays.asList(
+                TestResources.class.getResource("/cmark-regression.txt"),
+                TestResources.class.getResource("/commonmark.js-regression.txt")
+        );
+    }
+
+    public static String readAsString(URL url) {
+        StringBuilder sb = new StringBuilder();
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream(), Charset.forName("UTF-8")))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                sb.append(line);
+                sb.append("\n");
+            }
+            return sb.toString();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

commonmark-test-util/src/main/java/org/commonmark/testutil/spec/SpecExample.java → commonmark-test-util/src/main/java/org/commonmark/testutil/example/Example.java

@@ -1,13 +1,15 @@
-package org.commonmark.testutil.spec;
+package org.commonmark.testutil.example;
 
-public class SpecExample {
+public class Example {
 
+    private final String filename;
     private final String section;
     private final int exampleNumber;
     private final String source;
     private final String html;
 
-    public SpecExample(String section, int exampleNumber, String source, String html) {
+    public Example(String filename, String section, int exampleNumber, String source, String html) {
+        this.filename = filename;
         this.section = section;
         this.exampleNumber = exampleNumber;
         this.source = source;
@@ -24,6 +26,6 @@ public String getHtml() {
 
     @Override
     public String toString() {
-        return "Section \"" + section + "\" example " + exampleNumber;
+        return "File \"" + filename + "\" section \"" + section + "\" example " + exampleNumber;
     }
 }

commonmark-test-util/src/main/java/org/commonmark/testutil/spec/SpecReader.java → commonmark-test-util/src/main/java/org/commonmark/testutil/example/ExampleReader.java

@@ -1,73 +1,54 @@
-package org.commonmark.testutil.spec;
+package org.commonmark.testutil.example;
 
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
+import java.io.*;
+import java.net.URL;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-public class SpecReader {
+/**
+ * Reader for files containing examples of CommonMark source and the expected HTML rendering (e.g. spec.txt).
+ */
+public class ExampleReader {
 
     private static final Pattern SECTION_PATTERN = Pattern.compile("#{1,6} *(.*)");
 
     private final InputStream inputStream;
+    private final String filename;
 
     private State state = State.BEFORE;
     private String section;
     private StringBuilder source;
     private StringBuilder html;
     private int exampleNumber = 0;
 
-    private List<SpecExample> examples = new ArrayList<>();
+    private List<Example> examples = new ArrayList<>();
 
-    private SpecReader(InputStream stream) {
+    private ExampleReader(InputStream stream, String filename) {
         this.inputStream = stream;
+        this.filename = filename;
     }
 
-    public static List<SpecExample> readExamples() {
-        try (InputStream stream = getSpecInputStream()) {
-            return new SpecReader(stream).read();
+    public static List<Example> readExamples(URL url) {
+        try (InputStream stream = url.openStream()) {
+            return new ExampleReader(stream, new File(url.getPath()).getName()).read();
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
     }
 
-    public static List<String> readExamplesAsString() {
-        List<SpecExample> examples = SpecReader.readExamples();
+    public static List<String> readExampleSources(URL url) {
+        List<Example> examples = ExampleReader.readExamples(url);
         List<String> result = new ArrayList<>();
-        for (SpecExample example : examples) {
+        for (Example example : examples) {
             result.add(example.getSource());
         }
         return result;
     }
 
-    public static String readSpec() {
-        StringBuilder sb = new StringBuilder();
-        try (BufferedReader reader = new BufferedReader(new InputStreamReader(getSpecInputStream(), Charset.forName("UTF-8")))) {
-            String line;
-            while ((line = reader.readLine()) != null) {
-                sb.append(line);
-                sb.append("\n");
-            }
-            return sb.toString();
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public static InputStream getSpecInputStream() {
-        InputStream stream = SpecReader.class.getResourceAsStream("/spec.txt");
-        if (stream == null) {
-            throw new IllegalStateException("Could not load spec.txt classpath resource");
-        }
-        return stream;
-    }
-
-    private List<SpecExample> read() throws IOException {
+    private List<Example> read() throws IOException {
         resetContents();
 
         try (BufferedReader reader = new BufferedReader(
@@ -106,7 +87,7 @@ private void processLine(String line) {
             case HTML:
                 if (line.equals("````````````````````````````````")) {
                     state = State.BEFORE;
-                    examples.add(new SpecExample(section, exampleNumber,
+                    examples.add(new Example(filename, section, exampleNumber,
                             source.toString(), html.toString()));
                     resetContents();
                 } else {

commonmark-test-util/src/main/resources/README.md

@@ -0,0 +1,7 @@
+These files are copied from the CommonMark repositories, namely:
+
+https://github.com/commonmark/CommonMark/blob/master/spec.txt
+https://github.com/commonmark/cmark/blob/master/test/regression.txt
+https://github.com/commonmark/commonmark.js/blob/master/test/regression.txt
+
+They are licensed as stated in those repositories.

commonmark-test-util/src/main/resources/cmark-regression.txt

@@ -0,0 +1,95 @@
+### Regression tests
+
+Issue #113: EOL character weirdness on Windows
+(Important: first line ends with CR + CR + LF)
+
+```````````````````````````````` example
+line1
+
+line2
+.
+<p>line1</p>
+<p>line2</p>
+````````````````````````````````
+
+Issue #114: cmark skipping first character in line
+(Important: the blank lines around "Repeatedly" contain a tab.)
+
+```````````````````````````````` example
+By taking it apart
+
+- alternative solutions
+→
+Repeatedly solving
+→
+- how techniques
+.
+<p>By taking it apart</p>
+<ul>
+<li>alternative solutions</li>
+</ul>
+<p>Repeatedly solving</p>
+<ul>
+<li>how techniques</li>
+</ul>
+````````````````````````````````
+
+Issue jgm/CommonMark#430:  h2..h6 not recognized as block tags.
+
+```````````````````````````````` example
+<h1>lorem</h1>
+
+<h2>lorem</h2>
+
+<h3>lorem</h3>
+
+<h4>lorem</h4>
+
+<h5>lorem</h5>
+
+<h6>lorem</h6>
+.
+<h1>lorem</h1>
+<h2>lorem</h2>
+<h3>lorem</h3>
+<h4>lorem</h4>
+<h5>lorem</h5>
+<h6>lorem</h6>
+````````````````````````````````
+
+Issue jgm/commonmark.js#109 - tabs after setext header line
+
+
+```````````````````````````````` example
+hi
+--→
+.
+<h2>hi</h2>
+````````````````````````````````
+
+Issue #177 - incorrect emphasis parsing
+
+```````````````````````````````` example
+a***b* c*
+.
+<p>a*<em><em>b</em> c</em></p>
+````````````````````````````````
+
+Issue #193 - unescaped left angle brackets in link destination
+
+```````````````````````````````` example
+[a]
+
+[a]: <te<st>
+.
+<p><a href="%3Cte%3Cst%3E">a</a></p>
+````````````````````````````````
+
+Issue #192 - escaped spaces in link destination
+
+
+```````````````````````````````` example
+[a](te\ st)
+.
+<p>[a](te\ st)</p>
+````````````````````````````````