diff --git a/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/bufferedreadervsfilereader/BufferedReaderUnitTest.java b/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/bufferedreadervsfilereader/BufferedReaderUnitTest.java new file mode 100644 index 0000000000..a2aeca56ad --- /dev/null +++ b/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/bufferedreadervsfilereader/BufferedReaderUnitTest.java @@ -0,0 +1,31 @@ +package com.baeldung.bufferedreadervsfilereader; + +import org.junit.Test; + +import static org.junit.jupiter.api.Assertions.assertEquals; + +import java.io.BufferedReader; +import java.io.FileReader; +import java.io.IOException; + +public class BufferedReaderUnitTest { + + @Test + public void whenReadingAFile_thenReadsLineByLine() { + StringBuilder result = new StringBuilder(); + + try (BufferedReader br = new BufferedReader(new FileReader("src/test/resources/sampleText1.txt"))) { + String line; + + while((line = br.readLine()) != null) { + result.append(line); + result.append('\n'); + } + } catch (IOException e) { + e.printStackTrace(); + } + + assertEquals("first line\nsecond line\nthird line\n", result.toString()); + } + +} diff --git a/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/bufferedreadervsfilereader/FileReaderUnitTest.java b/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/bufferedreadervsfilereader/FileReaderUnitTest.java new file mode 100644 index 0000000000..f046f313d4 --- /dev/null +++ b/core-java-modules/core-java-io-apis-2/src/test/java/com/baeldung/bufferedreadervsfilereader/FileReaderUnitTest.java @@ -0,0 +1,30 @@ +package com.baeldung.bufferedreadervsfilereader; + +import org.junit.jupiter.api.Test; + +import java.io.FileReader; +import java.io.IOException; + +import static org.junit.jupiter.api.Assertions.assertEquals; + +public class FileReaderUnitTest { + + @Test + public void whenReadingAFile_thenReadsCharByChar() { + StringBuilder result = new StringBuilder(); + + try (FileReader fr = new FileReader("src/test/resources/sampleText2.txt")) { + int i = fr.read(); + + while(i != -1) { + result.append((char)i); + + i = fr.read(); + } + } catch (IOException e) { + e.printStackTrace(); + } + + assertEquals("qwerty", result.toString()); + } +} diff --git a/core-java-modules/core-java-io-apis-2/src/test/resources/sampleText1.txt b/core-java-modules/core-java-io-apis-2/src/test/resources/sampleText1.txt new file mode 100644 index 0000000000..20aeba2bad --- /dev/null +++ b/core-java-modules/core-java-io-apis-2/src/test/resources/sampleText1.txt @@ -0,0 +1,3 @@ +first line +second line +third line diff --git a/core-java-modules/core-java-io-apis-2/src/test/resources/sampleText2.txt b/core-java-modules/core-java-io-apis-2/src/test/resources/sampleText2.txt new file mode 100644 index 0000000000..f2289097d4 --- /dev/null +++ b/core-java-modules/core-java-io-apis-2/src/test/resources/sampleText2.txt @@ -0,0 +1 @@ +qwerty \ No newline at end of file