[Datatable] Support boolean parsing in Datatables (#2614)

Author: gaeljw

CHANGELOG.md

@@ -11,6 +11,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- [Datatable] Support parsing Booleans in Datatables ([#2614](https://github.com/cucumber/cucumber-jvm/pull/2614) G. Jourdan-Weil)
+
 ## [7.7.0] - 2022-09-08
 ### Added
 - [JUnit Platform] Enable parallel execution of features ([#2604](https://github.com/cucumber/cucumber-jvm/pull/2604) Sambathkumar Sekar)

datatable/src/main/java/io/cucumber/datatable/DataTableTypeRegistry.java

@@ -62,6 +62,10 @@ public DataTableTypeRegistry(Locale locale) {
         TableCellTransformer<Double> doubleTableCellTransformer = applyIfPresent(numberParser::parseDouble);
         defineDataTableType(new DataTableType(Double.class, doubleTableCellTransformer));
         defineDataTableType(new DataTableType(double.class, doubleTableCellTransformer));
+
+        TableCellTransformer<Boolean> booleanTableCellTransformer = applyIfPresent(Boolean::parseBoolean);
+        defineDataTableType(new DataTableType(Boolean.class, booleanTableCellTransformer, true));
+        defineDataTableType(new DataTableType(boolean.class, booleanTableCellTransformer, true));
     }
 
     private static <R> TableCellTransformer<R> applyIfPresent(Function<String, R> f) {

datatable/src/test/java/io/cucumber/datatable/DataTableTypeRegistryTest.java

@@ -29,6 +29,7 @@ class DataTableTypeRegistryTest {
     private static final Type LIST_OF_LIST_OF_FLOAT = aListOf(aListOf(Float.class));
     private static final Type LIST_OF_LIST_OF_DOUBLE = aListOf(aListOf(Double.class));
     private static final Type LIST_OF_LIST_OF_STRING = aListOf(aListOf(String.class));
+    private static final Type LIST_OF_LIST_OF_BOOLEAN = aListOf(aListOf(Boolean.class));
     private static final Type LIST_OF_LIST_OF_OBJECT = aListOf(aListOf(Object.class));
 
     private static final TableCellByTypeTransformer PLACE_TABLE_CELL_TRANSFORMER = (value,
@@ -244,4 +245,28 @@ void object_transformer_is_replaceable() {
             singletonList(singletonList("")),
             dataTableType.transform(singletonList(singletonList("[blank]"))));
     }
+
+    @Test
+    void parse_boolean() {
+        DataTableTypeRegistry registry = new DataTableTypeRegistry(Locale.ENGLISH);
+        DataTableType dataTableType = registry.lookupTableTypeByType(LIST_OF_LIST_OF_BOOLEAN);
+        assertEquals(
+            singletonList(singletonList(Boolean.TRUE)),
+            dataTableType.transform(singletonList(singletonList("true"))));
+        assertEquals(
+            singletonList(singletonList(Boolean.FALSE)),
+            dataTableType.transform(singletonList(singletonList("false"))));
+    }
+
+    @Test
+    void boolean_transformer_is_replaceable() {
+        DataTableTypeRegistry registry = new DataTableTypeRegistry(Locale.ENGLISH);
+        registry.defineDataTableType(
+            new DataTableType(Boolean.class, (String cell) -> "yes".equals(cell)));
+        DataTableType dataTableType = registry.lookupTableTypeByType(LIST_OF_LIST_OF_BOOLEAN);
+        assertEquals(
+            singletonList(singletonList(Boolean.TRUE)),
+            dataTableType.transform(singletonList(singletonList("yes"))));
+    }
+
 }