BAEL-7131 version 1 - POST REPO re-writing the commit history issue.
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package com.baeldung.inputstream;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.Arrays;
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import java.util.List;
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import org.junit.Assert;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.io.TempDir;
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public class InputStreamTest {
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@Test
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public void givenAString_whenWrittenToFileInputStream_thenShouldMatchWhenRead(@TempDir Path tempDir) throws IOException {
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Path sampleOut = tempDir.resolve("sample-out.txt");
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List<String> lines = Arrays.asList("Hello. This is just a test. Good bye.");
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Files.write(sampleOut, lines);
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File sampleOutFile = sampleOut.toFile();
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try(InputStream inputStream = new FileInputStream(sampleOutFile)){
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Assert.assertTrue(readString(inputStream).contains(lines.get(0)));
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}
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}
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@Test
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public void givenAString_whenWrittenToByteArrayInputStream_thenShouldMatchWhenRead() throws IOException {
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byte[] byteArray = {104, 101, 108, 108,111};
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try(ByteArrayInputStream bais = new ByteArrayInputStream(byteArray)){
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int content;
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StringBuilder actualReadText = new StringBuilder();
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while ((content = bais.read()) != -1) {
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actualReadText.append((char) content);
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}
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Assert.assertEquals( "hello",actualReadText.toString());
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}
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}
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private static String readString(InputStream inputStream) throws IOException {
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String strRet = "";
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int c;
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StringBuilder sb = new StringBuilder();
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while(!((c = inputStream.read()) != -1)) {
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sb.append((char) c);
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}
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strRet = sb.toString();
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return strRet;
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}
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}
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@ -0,0 +1,40 @@
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package com.baeldung.inputstreamreader;
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import java.io.BufferedReader;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.Arrays;
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import java.util.List;
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import org.junit.Assert;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.io.TempDir;
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public class InputStreamReaderTest {
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@Test
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public void givenAStringWrittenToAFile_whenReadByInputStreamReader_thenShouldMatchWhenRead(@TempDir Path tempDir) throws IOException {
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boolean isMatched = false;
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String sampleTxt = "Good day. This is just a test. Good bye.";
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Path sampleOut = tempDir.resolve("sample-out.txt");
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List<String> lines = Arrays.asList(sampleTxt);
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//create and write file
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Files.write(sampleOut, lines);
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try(FileInputStream fis = new FileInputStream(String.valueOf(sampleOut.toAbsolutePath()));
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BufferedReader br = new BufferedReader(new InputStreamReader(fis, StandardCharsets.UTF_8));){
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String ln;
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while((ln = br.readLine())!= null){
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if(ln.contains(sampleTxt)){
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isMatched = true;
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break;
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}
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}
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Assert.assertTrue(isMatched);
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}
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}
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}
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