From 9f22567d4f0935ac1c4da08c8f745847a3f477a4 Mon Sep 17 00:00:00 2001 From: amdegregorio Date: Sat, 2 Mar 2019 11:06:35 -0500 Subject: [PATCH] BAEL-2727 Example Code --- .../main/groovy/com/baeldung/io/Task.groovy | 8 ++ .../src/main/resources/binaryExample.jpg | Bin 0 -> 1139 bytes core-groovy/src/main/resources/ioData.txt | Bin 0 -> 34 bytes core-groovy/src/main/resources/ioInput.txt | 4 + core-groovy/src/main/resources/ioOutput.txt | 3 + .../src/main/resources/ioSerializedObject.txt | Bin 0 -> 199 bytes .../baeldung/io/DataAndObjectsUnitTest.groovy | 51 +++++++ .../baeldung/io/ReadExampleUnitTest.groovy | 134 ++++++++++++++++++ .../io/TraverseFileTreeUnitTest.groovy | 61 ++++++++ .../baeldung/io/WriteExampleUnitTest.groovy | 96 +++++++++++++ 10 files changed, 357 insertions(+) create mode 100644 core-groovy/src/main/groovy/com/baeldung/io/Task.groovy create mode 100644 core-groovy/src/main/resources/binaryExample.jpg create mode 100644 core-groovy/src/main/resources/ioData.txt create mode 100644 core-groovy/src/main/resources/ioInput.txt create mode 100644 core-groovy/src/main/resources/ioOutput.txt create mode 100644 core-groovy/src/main/resources/ioSerializedObject.txt create mode 100644 core-groovy/src/test/groovy/com/baeldung/io/DataAndObjectsUnitTest.groovy create mode 100644 core-groovy/src/test/groovy/com/baeldung/io/ReadExampleUnitTest.groovy create mode 100644 core-groovy/src/test/groovy/com/baeldung/io/TraverseFileTreeUnitTest.groovy create mode 100644 core-groovy/src/test/groovy/com/baeldung/io/WriteExampleUnitTest.groovy diff --git a/core-groovy/src/main/groovy/com/baeldung/io/Task.groovy b/core-groovy/src/main/groovy/com/baeldung/io/Task.groovy new file mode 100644 index 0000000000..8a3bedc048 --- /dev/null +++ b/core-groovy/src/main/groovy/com/baeldung/io/Task.groovy @@ -0,0 +1,8 @@ +package com.baeldung.io + +class Task implements Serializable { + String description + Date startDate + Date dueDate + int status +} diff --git a/core-groovy/src/main/resources/binaryExample.jpg b/core-groovy/src/main/resources/binaryExample.jpg new file mode 100644 index 0000000000000000000000000000000000000000..4b32645ac9b8030b3ed570263cd4f5c477a13d0f GIT binary patch literal 1139 zcmex=``2_j6xdp@o1cgOJMMZh|#U;coyG6VInuyV4pa*FVB^NNrR z{vTivwh= zDOELf4NWZ*Q!{f5ODks=S2uSLPp{yR(6I1`$f)F$)U@=B%&g*)(z5c3%Btp;*0%PJ z&aO$5r%atTea6gLixw|gx@`H1m8&*w-m-Pu_8mKS9XfpE=&|D`PM*4S`O4L6*Kgds z_3+W-Cr_U}fAR9w$4{TXeEs(Q$Io9Ne=#yJL%ap|8JfQYf&OA*VPR%r2lxYE z#}NLy#lXYN2#h>tK?Zwsdx80d=DeqoLp33BN>@lV5)W0p*xBF6khQ3U6 zd|u@KEmAIb41aHDTx{>#nkC<~Jx*3U>Uf9g?-TCdWVB0j6ID+27Ax=^&QO1*obaGL zF@Af(VsHJEk9BnJsHWWR@(aq%*y``S^~J;|=RU8_)Ly*5{gHTgeOkOMcddR{_HHJz zvQ1OwD?L;4=b8C4y2+f+eZ9r{3-#^)Y%cv%t}yrfs5Vpmm)v58sevc%N~g5DeGlVV zen;w0{g3vKPVbM$DeSnqzRcwulRHm+nTf1O)!$mr^-KOSRoFk$+xua*)BcNgS4?)c zJmZ~x;J`eG!p2v;m3tgpmiHXGxVCFba%`lR*R7Y=?$$r(Ynh{RrL^;1{5J77O?5WM z**o@_7PHNN%&k!~X*$aq^NUPgiw)$pd*-g~k$LbSVf`^V{tx~~);Hxo;?{AXX;%T4=@?p*vK{+sQO z^N*QpZr%B@-hbzZ^0v^!G2S)%V(+Z7S`#pThVb9#419YYi~gGYu%0(_AMb~Ea~Hn& swmNlL<_F!qdpIu&y0KsRHShT>jde1|Wuqm7uEupQ40*6 + out.writeUTF(message) + out.writeInt(length) + out.writeBoolean(valid) + } + + String loadedMessage = "" + int loadedLength + boolean loadedValid + + new File('src/main/resources/ioData.txt').withDataInputStream { is -> + loadedMessage = is.readUTF() + loadedLength = is.readInt() + loadedValid = is.readBoolean() + } + + assertEquals(message, loadedMessage) + assertEquals(length, loadedLength) + assertEquals(valid, loadedValid) + } + + @Test + void whenUsingWithObjectOutputStream_thenObjectIsSerializedToFile() { + Task task = new Task(description:'Take out the trash', startDate:new Date(), status:0) + new File('src/main/resources/ioSerializedObject.txt').withObjectOutputStream { out -> + out.writeObject(task) + } + + Task taskRead + + new File('src/main/resources/ioSerializedObject.txt').withObjectInputStream { is -> + taskRead = is.readObject() + } + + assertEquals(task.description, taskRead.description) + assertEquals(task.startDate, taskRead.startDate) + assertEquals(task.status, taskRead.status) + } +} diff --git a/core-groovy/src/test/groovy/com/baeldung/io/ReadExampleUnitTest.groovy b/core-groovy/src/test/groovy/com/baeldung/io/ReadExampleUnitTest.groovy new file mode 100644 index 0000000000..bed77b4d81 --- /dev/null +++ b/core-groovy/src/test/groovy/com/baeldung/io/ReadExampleUnitTest.groovy @@ -0,0 +1,134 @@ +package com.baeldung.io + +import static org.junit.Assert.* +import org.junit.Test + +class ReadExampleUnitTest { + + @Test + void whenUsingEachLine_thenCorrectLinesReturned() { + def expectedList = [ + 'First line of text', + 'Second line of text', + 'Third line of text', + 'Fourth line of text'] + + def lines = [] + + new File('src/main/resources/ioInput.txt').eachLine { line -> + lines.add(line) + } + assertEquals(expectedList, lines) + } + + @Test + void whenUsingReadEachLineWithLineNumber_thenCorrectLinesReturned() { + def expectedList = [ + 'Second line of text', + 'Third line of text', + 'Fourth line of text'] + + def lineNoRange = 2..4 + def lines = [] + + new File('src/main/resources/ioInput.txt').eachLine { line, lineNo -> + if (lineNoRange.contains(lineNo)) { + lines.add(line) + } + } + assertEquals(expectedList, lines) + } + + @Test + void whenUsingReadEachLineWithLineNumberStartAtZero_thenCorrectLinesReturned() { + def expectedList = [ + 'Second line of text', + 'Third line of text', + 'Fourth line of text'] + + def lineNoRange = 1..3 + def lines = [] + + new File('src/main/resources/ioInput.txt').eachLine(0, { line, lineNo -> + if (lineNoRange.contains(lineNo)) { + lines.add(line) + } + }) + assertEquals(expectedList, lines) + } + + @Test + void whenUsingWithReader_thenLineCountReturned() { + def expectedCount = 4 + def actualCount = 0 + new File('src/main/resources/ioInput.txt').withReader { reader -> + while(reader.readLine()) { + actualCount++ + } + } + assertEquals(expectedCount, actualCount) + } + + @Test + void whenUsingNewReader_thenOutputFileCreated() { + def outputPath = 'src/main/resources/ioOut.txt' + def reader = new File('src/main/resources/ioInput.txt').newReader() + new File(outputPath).append(reader) + reader.close() + def ioOut = new File(outputPath) + assertTrue(ioOut.exists()) + ioOut.delete() + } + + @Test + void whenUsingWithInputStream_thenCorrectBytesAreReturned() { + def expectedLength = 1139 + byte[] data = [] + new File("src/main/resources/binaryExample.jpg").withInputStream { stream -> + data = stream.getBytes() + } + assertEquals(expectedLength, data.length) + } + + @Test + void whenUsingNewInputStream_thenOutputFileCreated() { + def outputPath = 'src/main/resources/binaryOut.jpg' + def is = new File('src/main/resources/binaryExample.jpg').newInputStream() + new File(outputPath).append(is) + is.close() + def ioOut = new File(outputPath) + assertTrue(ioOut.exists()) + ioOut.delete() + } + + @Test + void whenUsingCollect_thenCorrectListIsReturned() { + def expectedList = ['First line of text', 'Second line of text', 'Third line of text', 'Fourth line of text'] + + def actualList = new File('src/main/resources/ioInput.txt').collect {it} + assertEquals(expectedList, actualList) + } + + @Test + void whenUsingAsStringArray_thenCorrectArrayIsReturned() { + String[] expectedArray = ['First line of text', 'Second line of text', 'Third line of text', 'Fourth line of text'] + + def actualArray = new File('src/main/resources/ioInput.txt') as String[] + assertArrayEquals(expectedArray, actualArray) + } + + @Test + void whenUsingText_thenCorrectStringIsReturned() { + def ln = System.getProperty('line.separator') + def expectedString = "First line of text${ln}Second line of text${ln}Third line of text${ln}Fourth line of text" + def actualString = new File('src/main/resources/ioInput.txt').text + assertEquals(expectedString.toString(), actualString) + } + + @Test + void whenUsingBytes_thenByteArrayIsReturned() { + def expectedLength = 1139 + def contents = new File('src/main/resources/binaryExample.jpg').bytes + assertEquals(expectedLength, contents.length) + } +} diff --git a/core-groovy/src/test/groovy/com/baeldung/io/TraverseFileTreeUnitTest.groovy b/core-groovy/src/test/groovy/com/baeldung/io/TraverseFileTreeUnitTest.groovy new file mode 100644 index 0000000000..dac0189fb9 --- /dev/null +++ b/core-groovy/src/test/groovy/com/baeldung/io/TraverseFileTreeUnitTest.groovy @@ -0,0 +1,61 @@ +package com.baeldung.io + +import org.junit.Test + +import groovy.io.FileType +import groovy.io.FileVisitResult + +class TraverseFileTreeUnitTest { + @Test + void whenUsingEachFile_filesAreListed() { + new File('src/main/resources').eachFile { file -> + println file.name + } + } + + @Test(expected = IllegalArgumentException) + void whenUsingEachFileOnAFile_anErrorOccurs() { + new File('src/main/resources/ioInput.txt').eachFile { file -> + println file.name + } + } + + @Test + void whenUsingEachFileMatch_filesAreListed() { + new File('src/main/resources').eachFileMatch(~/io.*\.txt/) { file -> + println file.name + } + } + + @Test + void whenUsingEachFileRecurse_thenFilesInSubfoldersAreListed() { + new File('src/main').eachFileRecurse(FileType.FILES) { file -> + println "$file.parent $file.name" + } + } + + @Test + void whenUsingEachFileRecurse_thenDirsInSubfoldersAreListed() { + new File('src/main').eachFileRecurse(FileType.DIRECTORIES) { file -> + println "$file.parent $file.name" + } + } + + @Test + void whenUsingEachDirRecurse_thenDirsAndSubDirsAreListed() { + new File('src/main').eachDirRecurse { dir -> + println "$dir.parent $dir.name" + } + } + + @Test + void whenUsingTraverse_thenDirectoryIsTraversed() { + new File('src/main').traverse { file -> + if (file.directory && file.name == 'groovy') { + FileVisitResult.SKIP_SUBTREE + } else { + println "$file.parent - $file.name" + } + } + } +} diff --git a/core-groovy/src/test/groovy/com/baeldung/io/WriteExampleUnitTest.groovy b/core-groovy/src/test/groovy/com/baeldung/io/WriteExampleUnitTest.groovy new file mode 100644 index 0000000000..81758b430a --- /dev/null +++ b/core-groovy/src/test/groovy/com/baeldung/io/WriteExampleUnitTest.groovy @@ -0,0 +1,96 @@ +package com.baeldung.io + +import static org.junit.Assert.* + +import org.junit.Before +import org.junit.Test + +class WriteExampleUnitTest { + @Before + void clearOutputFile() { + new File('src/main/resources/ioOutput.txt').text = '' + new File('src/main/resources/ioBinaryOutput.bin').delete() + } + + @Test + void whenUsingWithWriter_thenFileCreated() { + def outputLines = [ + 'Line one of output example', + 'Line two of output example', + 'Line three of output example' + ] + + def outputFileName = 'src/main/resources/ioOutput.txt' + new File(outputFileName).withWriter { writer -> + outputLines.each { line -> + writer.writeLine line + } + } + def writtenLines = new File(outputFileName).collect {it} + assertEquals(outputLines, writtenLines) + } + + @Test + void whenUsingNewWriter_thenFileCreated() { + def outputLines = [ + 'Line one of output example', + 'Line two of output example', + 'Line three of output example' + ] + + def outputFileName = 'src/main/resources/ioOutput.txt' + def writer = new File(outputFileName).newWriter() + outputLines.forEach {line -> + writer.writeLine line + } + writer.flush() + writer.close() + + def writtenLines = new File(outputFileName).collect {it} + assertEquals(outputLines, writtenLines) + } + + @Test + void whenUsingDoubleLessThanOperator_thenFileCreated() { + def outputLines = [ + 'Line one of output example', + 'Line two of output example', + 'Line three of output example' + ] + + def ln = System.getProperty('line.separator') + def outputFileName = 'src/main/resources/ioOutput.txt' + new File(outputFileName) << "Line one of output example${ln}Line two of output example${ln}Line three of output example" + def writtenLines = new File(outputFileName).collect {it} + assertEquals(outputLines.size(), writtenLines.size()) + } + + @Test + void whenUsingBytes_thenBinaryFileCreated() { + def outputFileName = 'src/main/resources/ioBinaryOutput.bin' + def outputFile = new File(outputFileName) + byte[] outBytes = [44, 88, 22] + outputFile.bytes = outBytes + assertEquals(3, new File(outputFileName).size()) + } + + @Test + void whenUsingWithOutputStream_thenBinaryFileCreated() { + def outputFileName = 'src/main/resources/ioBinaryOutput.bin' + byte[] outBytes = [44, 88, 22] + new File(outputFileName).withOutputStream { stream -> + stream.write(outBytes) + } + assertEquals(3, new File(outputFileName).size()) + } + + @Test + void whenUsingNewOutputStream_thenBinaryFileCreated() { + def outputFileName = 'src/main/resources/ioBinaryOutput.bin' + byte[] outBytes = [44, 88, 22] + def os = new File(outputFileName).newOutputStream() + os.write(outBytes) + os.close() + assertEquals(3, new File(outputFileName).size()) + } +}