[BAEL-3750] Breaking YAML Strings Over Multiple Lines (#8664)

* [BAEL-3750] Breaking YAML Strings Over Multiple Lines

* Added yamo module to appropriate profiles

* Article improvements

* Fix

* [BAEL-3750] Moved multi line yaml files from the yaml module to the libraries-data-io folder

* [BAEL-3750] deleted the yaml module

Co-authored-by: cristirosu <cristi.rosu4@gmail.com>

libraries-data-io/src/test/java/com/baeldung/libraries/snakeyaml/MultiLineStringsUnitTest.java

@@ -0,0 +1,90 @@
+package com.baeldung.libraries.snakeyaml;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.yaml.snakeyaml.Yaml;
+
+import java.io.File;
+import java.io.InputStream;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+
+public class MultiLineStringsUnitTest {
+
+    private Yaml yaml;
+
+    @Before
+    public void setup() {
+        yaml = new Yaml();
+    }
+
+    @Test
+    public void whenLiteral_ThenLineBreaksArePresent() {
+        String key = parseYamlKey("literal.yaml", "key");
+        assertEquals("Line1\nLine2\nLine3", key);
+    }
+
+    @Test
+    public void whenLiteral_ThenEndingBreaksAreReducedToOne() {
+        String key = parseYamlKey("literal2.yaml", "key");
+        assertEquals("\n\nLine1\n\nLine2\n\nLine3\n", key);
+    }
+
+    @Test
+    public void whenFolded_ThenLineBreaksAreReplaced() {
+        String key = parseYamlKey("folded.yaml", "key");
+        assertEquals("Line1 Line2 Line3", key);
+    }
+
+    @Test
+    public void whenFolded_ThenEmptyLinesAreReducedToOne() {
+        String key = parseYamlKey("folded2.yaml", "key");
+        assertEquals("Line1 Line2\n\nLine3\n", key);
+    }
+
+    @Test
+    public void whenLiteralKeep_ThenLastEmptyLinesArePresent() {
+        String key = parseYamlKey("literal_keep.yaml", "key");
+        assertEquals("Line1\nLine2\nLine3\n\n", key);
+    }
+
+    @Test
+    public void whenLiteralStrip_ThenLastEmptyLinesAreRemoved() {
+        String key = parseYamlKey("literal_strip.yaml", "key");
+        assertEquals("Line1\nLine2\nLine3", key);
+    }
+
+    @Test
+    public void whenFoldedKeep_ThenLastEmptyLinesArePresent() {
+        String key = parseYamlKey("folded_keep.yaml", "key");
+        assertEquals("Line1 Line2 Line3\n\n\n", key);
+    }
+
+    @Test
+    public void whenFoldedStrip_ThenLastEmptyLinesAreRemoved() {
+        String key = parseYamlKey("folded_strip.yaml", "key");
+        assertEquals("Line1 Line2 Line3", key);
+    }
+
+    @Test
+    public void whenDoubleQuotes_ThenExplicitBreaksArePreserved() {
+        String key = parseYamlKey("plain_double_quotes.yaml", "key");
+        assertEquals("Line1\nLine2\nLine3", key);
+    }
+
+    @Test
+    public void whenSingleQuotes_ThenExplicitBreaksAreIgnored() {
+        String key = parseYamlKey("plain_single_quotes.yaml", "key");
+        assertEquals("Line1\\nLine2\nLine3", key);
+    }
+
+    String parseYamlKey(String fileName, String key) {
+        InputStream inputStream = this.getClass()
+                .getClassLoader()
+                .getResourceAsStream("yaml" + File.separator + "multiline" + File.separator + fileName);
+        Map<String, String> parsed = yaml.load(inputStream);
+        return parsed.get(key);
+    }
+
+}

libraries-data-io/src/test/resources/yaml/multiline/folded.yaml

@@ -0,0 +1,4 @@
+key: >
+  Line1
+  Line2
+  Line3

libraries-data-io/src/test/resources/yaml/multiline/folded2.yaml

@@ -0,0 +1,8 @@
+key: >
+  Line1
+  Line2
+
+
+  Line3
+
+

libraries-data-io/src/test/resources/yaml/multiline/folded_keep.yaml

@@ -0,0 +1,6 @@
+key: >+
+  Line1
+  Line2
+  Line3
+
+

libraries-data-io/src/test/resources/yaml/multiline/folded_strip.yaml

@@ -0,0 +1,7 @@
+key: >-
+  Line1
+  Line2
+  Line3
+
+
+

libraries-data-io/src/test/resources/yaml/multiline/literal.yaml

@@ -0,0 +1,4 @@
+key: |
+  Line1
+  Line2
+  Line3

libraries-data-io/src/test/resources/yaml/multiline/literal2.yaml

@@ -0,0 +1,10 @@
+key: |
+
+
+  Line1
+
+  Line2
+
+  Line3
+
+

libraries-data-io/src/test/resources/yaml/multiline/literal_keep.yaml

@@ -0,0 +1,5 @@
+key: |+
+  Line1
+  Line2
+  Line3
+

libraries-data-io/src/test/resources/yaml/multiline/literal_strip.yaml

@@ -0,0 +1,5 @@
+key: |-
+  Line1
+  Line2
+  Line3
+

libraries-data-io/src/test/resources/yaml/multiline/plain_double_quotes.yaml

@@ -0,0 +1 @@
+key: "Line1\nLine2\nLine3"

libraries-data-io/src/test/resources/yaml/multiline/plain_single_quotes.yaml

@@ -0,0 +1,3 @@
+key: 'Line1\nLine2
+
+  Line3'