JAVA-1522 Fix integration test for encoding package

2020-06-07 18:17:43 +02:00
parent aece4e5216
commit 3b1fd20014
1 changed files with 0 additions and 0 deletions
--- a/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/encoding/CharacterEncodingExamplesUnitTest.java
+++ b/core-java-modules/core-java-string-operations-2/src/test/java/com/baeldung/encoding/CharacterEncodingExamplesUnitTest.java
@@ -0,0 +1,124 @@
+package com.baeldung.encoding;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CodingErrorAction;
+import java.nio.charset.MalformedInputException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+
+public class CharacterEncodingExamplesUnitTest {
+
+    @Test
+    public void givenTextFile_whenCalledWithEncodingASCII_thenProduceIncorrectResult() throws IOException {
+        Assert.assertEquals(
+          CharacterEncodingExamples.readFile(
+            "src/test/resources/encoding.txt", "US-ASCII"), 
+            "The fa<66><61>ade pattern is a software-design pattern commonly used with object-oriented programming.");
+    }
+
+    @Test
+    public void givenTextFile_whenCalledWithEncodingUTF8_thenProduceCorrectResult() throws IOException {
+        Assert.assertEquals(
+          CharacterEncodingExamples.readFile(
+            "src/test/resources/encoding.txt", "UTF-8"), 
+            "The façade pattern is a software-design pattern commonly used with object-oriented programming.");
+    }
+
+    @Test
+    public void givenCharacterA_whenConvertedtoBinaryWithEncodingASCII_thenProduceResult() throws IOException {
+        Assert.assertEquals(
+          CharacterEncodingExamples.convertToBinary("A", "US-ASCII"), 
+          "1000001 ");
+    }
+
+    @Test
+    public void givenCharacterA_whenConvertedtoBinaryWithEncodingUTF8_thenProduceResult() throws IOException {
+        Assert.assertEquals(
+          CharacterEncodingExamples.convertToBinary("A", "UTF-8"), 
+          "1000001 ");
+    }
+
+    @Test
+    public void givenCharacterCh_whenConvertedtoBinaryWithEncodingBig5_thenProduceResult() throws IOException {
+        Assert.assertEquals(
+          CharacterEncodingExamples.convertToBinary("語", "Big5"), 
+          "10111011 1111001 ");
+    }
+
+    @Test
+    public void givenCharacterCh_whenConvertedtoBinaryWithEncodingUTF8_thenProduceResult() throws IOException {
+        Assert.assertEquals(
+          CharacterEncodingExamples.convertToBinary("語", "UTF-8"), 
+          "11101000 10101010 10011110 ");
+    }
+
+    @Test
+    public void givenCharacterCh_whenConvertedtoBinaryWithEncodingUTF32_thenProduceResult() throws IOException {
+        Assert.assertEquals(
+          CharacterEncodingExamples.convertToBinary("語", "UTF-32"), 
+          "0 0 10001010 10011110 ");
+    }
+
+    @Test
+    public void givenUTF8String_whenDecodeByUS_ASCII_thenIgnoreMalformedInputSequence() throws IOException {
+        Assertions.assertEquals("The faade pattern is a software design pattern.", CharacterEncodingExamples.decodeText("The façade pattern is a software design pattern.", StandardCharsets.US_ASCII, CodingErrorAction.IGNORE));
+    }
+
+    @Test
+    public void givenUTF8String_whenDecodeByUS_ASCII_thenReplaceMalformedInputSequence() throws IOException {
+        Assertions.assertEquals(
+          "The fa<66><61>ade pattern is a software design pattern.",
+          CharacterEncodingExamples.decodeText(
+            "The façade pattern is a software design pattern.",
+            StandardCharsets.US_ASCII,
+            CodingErrorAction.REPLACE));
+    }
+
+    @Test
+    public void givenUTF8String_whenDecodeByUS_ASCII_thenReportMalformedInputSequence() {
+        Assertions.assertThrows(
+          MalformedInputException.class,
+          () -> CharacterEncodingExamples.decodeText(
+            "The façade pattern is a software design pattern.",
+            StandardCharsets.US_ASCII,
+            CodingErrorAction.REPORT));
+    }
+
+    @Test
+    public void givenTextFile_whenLoopOverAllCandidateEncodings_thenProduceSuitableCandidateEncodings() {
+        Path path = Paths.get("src/test/resources/encoding.txt");
+        List<Charset> allCandidateCharSets = Arrays.asList(
+          StandardCharsets.US_ASCII, StandardCharsets.UTF_8, StandardCharsets.ISO_8859_1);
+
+        List<Charset> suitableCharsets = new ArrayList<>();
+        allCandidateCharSets.forEach(charset -> {
+            try {
+                CharsetDecoder charsetDecoder = charset.newDecoder().onMalformedInput(CodingErrorAction.REPORT);
+                Reader reader = new InputStreamReader(Files.newInputStream(path), charsetDecoder);
+                BufferedReader bufferedReader = new BufferedReader(reader);
+                bufferedReader.readLine();
+                suitableCharsets.add(charset);
+            } catch (MalformedInputException ignored) {
+            } catch (IOException ex) {
+                ex.printStackTrace();
+            }
+        });
+
+        Assertions.assertEquals(suitableCharsets, Arrays.asList(StandardCharsets.UTF_8, StandardCharsets.ISO_8859_1));
+    }
+
+}