Run burntsushi tests on TomlWriter, where possible.

src/main/java/com/moandjiezana/toml/MapValueWriter.java

@@ -22,7 +22,7 @@ class MapValueWriter implements ValueWriter {
   public void write(Object value, WriterContext context) {
     Map from = (Map) value;
 
-    if (hasPrimitiveValues(from)) {
+    if (hasPrimitiveValues(from, context)) {
       context.writeKey();
     }
 
@@ -81,7 +81,7 @@ class MapValueWriter implements ValueWriter {
     return stringKey;
   }
 
-  private static boolean hasPrimitiveValues(Map values) {
+  private static boolean hasPrimitiveValues(Map values, WriterContext context) {
     for (Object key : values.keySet()) {
       Object fromValue = values.get(key);
       if (fromValue == null) {

src/main/java/com/moandjiezana/toml/TomlWriter.java

@@ -29,7 +29,7 @@ import static com.moandjiezana.toml.ValueWriters.WRITERS;
 public class TomlWriter {
 
   private WriterIndentationPolicy indentationPolicy = new WriterIndentationPolicy();
-  private boolean wantTerseArraysValue = true;
+  private boolean wantTerseArraysValue = false;
   private GregorianCalendar calendar = new GregorianCalendar();
   private DateFormat customDateFormat = null;
 

src/test/java/com/moandjiezana/toml/BurntSushiValidTest.java

@@ -1,6 +1,8 @@
 package com.moandjiezana.toml;
 
-import static org.junit.Assert.assertEquals;
+import com.google.gson.*;
+import org.junit.Ignore;
+import org.junit.Test;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -8,24 +10,11 @@ import java.io.InputStreamReader;
 import java.io.Reader;
 import java.lang.reflect.Type;
 import java.text.DateFormat;
+import java.text.ParseException;
 import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.TimeZone;
+import java.util.*;
 
-import org.junit.Ignore;
-import org.junit.Test;
-
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import com.google.gson.JsonArray;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonPrimitive;
-import com.google.gson.JsonSerializationContext;
-import com.google.gson.JsonSerializer;
+import static org.junit.Assert.assertEquals;
 
 public class BurntSushiValidTest {
 
@@ -43,11 +32,13 @@ public class BurntSushiValidTest {
   @Test
   public void arrays_hetergeneous() throws Exception {
     run("arrays-hetergeneous");
+    runEncoder("arrays-hetergeneous");
   }
   
   @Test
   public void arrays_nested() throws Exception {
     run("arrays-nested");
+    runEncoder("arrays-nested");
   }
   
   @Test
@@ -68,21 +59,25 @@ public class BurntSushiValidTest {
   @Test
   public void datetime() throws Exception {
     run("datetime");
+    runEncoder("datetime");
   }
   
   @Test
   public void empty() throws Exception {
     run("empty");
+    runEncoder("empty");
   }
   
   @Test
   public void example() throws Exception {
     run("example");
+    runEncoder("example");
   }
   
   @Test
   public void float_() throws Exception {
     run("float");
+    runEncoder("float");
   }
   
   @Test
@@ -93,16 +88,19 @@ public class BurntSushiValidTest {
   @Test
   public void implicit_and_explicit_before() throws Exception {
     run("implicit-and-explicit-before");
+    runEncoder("implicit-and-explicit-before");
   }
   
   @Test
   public void implicit_groups() throws Exception {
     run("implicit-groups");
+    runEncoder("implicit-groups");
   }
   
   @Test
   public void integer() throws Exception {
     run("integer");
+    runEncoder("integer");
   }
   
   @Test
@@ -128,6 +126,7 @@ public class BurntSushiValidTest {
   @Test
   public void key_special_chars_modified() throws Exception {
     run("key-special-chars-modified");
+    runEncoder("key-special-chars-modified");
   }
   
   @Test @Ignore
@@ -143,11 +142,13 @@ public class BurntSushiValidTest {
   @Test
   public void long_float() throws Exception {
     run("long-float");
+    runEncoder("long-float");
   }
   
   @Test
   public void long_integer() throws Exception {
     run("long-integer");
+    runEncoder("long-integer");
   }
   
   @Test @Ignore
@@ -173,6 +174,7 @@ public class BurntSushiValidTest {
   @Test
   public void string_empty() throws Exception {
     run("string-empty");
+    runEncoder("string-empty");
   }
   
   @Test @Ignore
@@ -183,11 +185,13 @@ public class BurntSushiValidTest {
   @Test
   public void string_escapes_modified() throws Exception {
     run("string-escapes-modified");
+    runEncoder("string-escapes-modified");
   }
   
   @Test
   public void string_simple() throws Exception {
     run("string-simple");
+    runEncoder("string-simple");
   }
   
   @Test
@@ -198,11 +202,13 @@ public class BurntSushiValidTest {
   @Test
   public void table_array_implicit() throws Exception {
     run("table-array-implicit");
+    runEncoder("table-array-implicit");
   }
 
   @Test
   public void table_array_many() throws Exception {
     run("table-array-many");
+    runEncoder("table-array-many");
   }
 
   @Test
@@ -210,9 +216,17 @@ public class BurntSushiValidTest {
     run("table-array-nest");
   }
 
+  @Test
+  public void table_array_nest_modified() throws Exception {
+    // Same test, but with stray spaces in the expected TOML removed
+    runEncoder("table-array-nest-modified",
+        new TomlWriter().setIndentationPolicy(new WriterIndentationPolicy().setTableIndent(2)));
+  }
+
   @Test
   public void table_array_one() throws Exception {
     run("table-array-one");
+    runEncoder("table-array-one");
   }
 
   @Test
@@ -246,7 +260,9 @@ public class BurntSushiValidTest {
   }
 
   private void run(String testName) {
-    InputStream inputToml = getClass().getResourceAsStream("burntsushi/valid/" + testName + ".toml");
+    InputStream inputTomlStream = getClass().getResourceAsStream("burntsushi/valid/" + testName + ".toml");
+    // InputStream inputToml = getClass().getResourceAsStream("burntsushi/valid/" + testName + ".toml");
+    String inputToml = convertStreamToString(inputTomlStream);
     Reader expectedJsonReader = new InputStreamReader(getClass().getResourceAsStream("burntsushi/valid/" + testName + ".json"));
     JsonElement expectedJson = GSON.fromJson(expectedJsonReader, JsonElement.class);
 
@@ -256,7 +272,7 @@ public class BurntSushiValidTest {
     assertEquals(expectedJson, actual);
 
     try {
-      inputToml.close();
+      inputTomlStream.close();
     } catch (IOException e) {}
     
     try {
@@ -264,6 +280,93 @@ public class BurntSushiValidTest {
     } catch (IOException e) {}
   }
 
+  static String convertStreamToString(java.io.InputStream is) {
+      java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
+      return s.hasNext() ? s.next() : "";
+  }
+
+  private void runEncoder(String testName) {
+    runEncoder(testName,
+        new TomlWriter().
+            wantTerseArrays(true).
+            setTimeZone(TimeZone.getTimeZone("UTC")).
+            setDateFormat(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'")));
+  }
+
+  private void runEncoder(String testName, TomlWriter tomlWriter) {
+    InputStream inputTomlStream = getClass().getResourceAsStream("burntsushi/valid/" + testName + ".toml");
+    String expectedToml = convertStreamToString(inputTomlStream);
+
+    Reader inputJsonReader = new InputStreamReader(getClass().getResourceAsStream("burntsushi/valid/" + testName + ".json"));
+    JsonElement jsonInput = GSON.fromJson(inputJsonReader, JsonElement.class);
+    Map<String, Object> enriched = enrichJson(jsonInput.getAsJsonObject());
+
+    String encoded = tomlWriter.write(enriched);
+    assertEquals(expectedToml, encoded);
+  }
+
+  // Enrich toml-test JSON trees into native Java types, suiteable
+  // for consumption by TomlWriter.
+  private Map<String, Object> enrichJson(JsonObject jsonObject) {
+    Map<String, Object> enriched = new LinkedHashMap<String, Object>();
+    for (Map.Entry<String, JsonElement> entry : jsonObject.entrySet()) {
+      enriched.put(entry.getKey(), enrichJsonElement(entry.getValue()));
+    }
+
+    return enriched;
+  }
+
+  Object enrichJsonElement(JsonElement jsonElement) {
+    if (jsonElement.isJsonObject()) {
+      JsonObject jsonObject = jsonElement.getAsJsonObject();
+      if (jsonObject.has("type") && jsonObject.has("value")) {
+        return enrichPrimitive(jsonObject);
+      }
+      return enrichJson(jsonElement.getAsJsonObject());
+    } else if (jsonElement.isJsonArray()) {
+      List<Object> tables = new LinkedList<Object>();
+      for (JsonElement arrayElement : jsonElement.getAsJsonArray()) {
+        tables.add(enrichJsonElement(arrayElement));
+      }
+
+      return tables;
+    }
+
+    throw new AssertionError("received unexpected JsonElement: " + jsonElement);
+  }
+
+  private Object enrichPrimitive(JsonObject jsonObject) {
+    String type = jsonObject.getAsJsonPrimitive("type").getAsString();
+    if ("bool".equals(type)) {
+      return jsonObject.getAsJsonPrimitive("value").getAsBoolean();
+    } else if ("integer".equals(type)) {
+      return jsonObject.getAsJsonPrimitive("value").getAsBigInteger();
+    } else if ("float".equals(type)) {
+      return jsonObject.getAsJsonPrimitive("value").getAsDouble();
+    } else if ("string".equals(type)) {
+      return jsonObject.getAsJsonPrimitive("value").getAsString();
+    } else if ("datetime".equals(type)) {
+      DateFormat iso8601Format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
+      iso8601Format.setTimeZone(TimeZone.getTimeZone("UTC"));
+      String dateString = jsonObject.getAsJsonPrimitive("value").getAsString();
+      try {
+        return iso8601Format.parse(dateString);
+      } catch (ParseException e) {
+        throw new AssertionError("failed to parse datetime '" + dateString + "': " + e.getMessage());
+      }
+    } else if ("array".equals(type)) {
+      JsonArray jsonArray = jsonObject.getAsJsonArray("value");
+      List<Object> enriched = new LinkedList<Object>();
+      for (JsonElement arrayElement : jsonArray) {
+        enriched.add(enrichJsonElement(arrayElement));
+      }
+
+      return enriched;
+    }
+
+    throw new AssertionError("enrichPrimitive: received unknown type " + type);
+  }
+
   private static final Gson GSON = new Gson();
   private static final Gson TEST_GSON = new GsonBuilder()
     .registerTypeAdapter(Boolean.class, serialize(Boolean.class))

src/test/java/com/moandjiezana/toml/ValueWriterTest.java

@@ -317,7 +317,7 @@ public class ValueWriterTest {
   @Test
   public void should_write_strings_to_toml_utf8() throws UnsupportedEncodingException {
     String input = " é foo € \b \t \n \f \r \" \\ ";
-    assertEquals("\" \\u00E9 foo \\u20AC \\b \\t \\n \\f \\r \\\" \\ \"", new TomlWriter().write(input));
+    assertEquals("\" \\u00E9 foo \\u20AC \\b \\t \\n \\f \\r \\\" \\\\ \"", new TomlWriter().write(input));
 
     // Check unicode code points greater than 0XFFFF
     input = " \uD801\uDC28 \uD840\uDC0B ";

src/test/resources/com/moandjiezana/toml/burntsushi/valid/table-array-nest-modified.json

@@ -0,0 +1,18 @@
+{
+    "albums": [
+        {
+            "name": {"type": "string", "value": "Born to Run"},
+            "songs": [
+                {"name": {"type": "string", "value": "Jungleland"}},
+                {"name": {"type": "string", "value": "Meeting Across the River"}}
+            ]
+        },
+        {
+            "name": {"type": "string", "value": "Born in the USA"},
+            "songs": [
+                {"name": {"type": "string", "value": "Glory Days"}},
+                {"name": {"type": "string", "value": "Dancing in the Dark"}}
+            ]
+        }
+    ]
+}

src/test/resources/com/moandjiezana/toml/burntsushi/valid/table-array-nest-modified.toml

@@ -0,0 +1,17 @@
+[[albums]]
+name = "Born to Run"
+
+  [[albums.songs]]
+  name = "Jungleland"
+
+  [[albums.songs]]
+  name = "Meeting Across the River"
+
+[[albums]]
+name = "Born in the USA"
+
+  [[albums.songs]]
+  name = "Glory Days"
+
+  [[albums.songs]]
+  name = "Dancing in the Dark"