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Commite2de644

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157 (2) add tests
1 parentac97e00 commite2de644

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5 files changed

+242
-41
lines changed

5 files changed

+242
-41
lines changed
Lines changed: 37 additions & 0 deletions
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/**
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***************************************************************************
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* Description:
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*
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* The API: int read4(char *buf) reads 4 characters at a time from a file.
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*
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* The return value is the actual number of characters read. For example,
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* it returns 3 if there is only 3 characters left in the file.
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*
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* By using the read4 API, implement the function int read(char *buf, int n)
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* that reads n characters from the file.
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*
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* Note: The read function will only be called once for each test case.
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*
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***************************************************************************
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* @tag : String
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* {@link https://leetcode.com/problems/read-n-characters-given-read4/ }
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*/
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package_157_ReadNCharactersGivenRead4;
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/** see test {@link _157_ReadNCharactersGivenRead4.PracticeTest } */
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/*
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* The read4 API is defined in the parent class Reader4. int read4(char[] buf);
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*/
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publicclassPracticeextendsReader4 {
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/**
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* @param buf Destination buffer
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* @param n Maximum number of characters to read
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* @return The number of characters read
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*/
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publicintread(char[]buf,intn) {
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// TODO:
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return0;
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}
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}

‎src/_157_ReadNCharactersGivenRead4/Reader4.java

Lines changed: 21 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,8 +2,28 @@
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publicclassReader4 {
44

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privatechar[]_contents;
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privateint_offset;
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privatestaticfinalintREAD_SIZE =4;
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publicReader4() {
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_contents =null;
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_offset =0;
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}
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publicvoidsetContents(char[]contents) {
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this._contents =contents;
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}
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publicintread4(char[]buf) {
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return0;
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intsz =Math.min(_contents.length -_offset,READ_SIZE);
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for (inti =0;i <sz;i++) {
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buf[i] =_contents[_offset +i];
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}
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_offset +=sz;
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returnsz;
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}
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}

‎src/_157_ReadNCharactersGivenRead4/SolutionTest.java

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This file was deleted.
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package_157_ReadNCharactersGivenRead4;
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importstaticorg.junit.Assert.*;
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importorg.junit.After;
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importorg.junit.Before;
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importorg.junit.Rule;
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importorg.junit.Test;
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importorg.junit.rules.Timeout;
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publicclassPracticeTest {
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/** Test method for {@link _157_ReadNCharactersGivenRead4.Practice } */
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Practicereader;
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@Rule
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publicTimeoutglobalTimeout =newTimeout(200);
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@Before
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publicvoidsetUp()throwsException {
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reader =newPractice();
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}
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@After
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publicvoidtearDown()throwsException {
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reader =null;
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}
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@Test
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publicvoidTest1() {
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char[]contents = {'a' };
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reader.setContents(contents);
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intn =1;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =1;
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assertEquals(expected,actual);
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char[]exps = {'a' };
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assertArrayEquals(exps,buf);
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}
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@Test
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publicvoidTest2() {
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char[]contents = {'a' ,'d','c','b' };
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reader.setContents(contents);
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intn =2;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =2;
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assertEquals(expected,actual);
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char[]exps = {'a','d' };
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assertArrayEquals(exps,buf);
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}
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@Test
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publicvoidTest3() {
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char[]contents = {'x' ,'y' };
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reader.setContents(contents);
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intn =5;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =2;
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assertEquals(expected,actual);
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char[]exps =newchar[n];
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exps[0] ='x';
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exps[1] ='y';
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assertArrayEquals(exps,buf);
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}
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@Test
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publicvoidTest4() {
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char[]contents = {'a','b','c','d','e'};
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reader.setContents(contents);
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intn =7;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =5;
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assertEquals(expected,actual);
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char[]exps =newchar[n];
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exps[0] ='a';
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exps[1] ='b';
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exps[2] ='c';
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exps[3] ='d';
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exps[4] ='e';
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assertArrayEquals(exps,buf);
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}
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}
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package_157_ReadNCharactersGivenRead4;
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importstaticorg.junit.Assert.*;
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importorg.junit.After;
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importorg.junit.Before;
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importorg.junit.Rule;
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importorg.junit.Test;
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importorg.junit.rules.Timeout;
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publicclassSolutionTest {
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/** Test method for {@link _157_ReadNCharactersGivenRead4.Solution } */
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Solutionreader;
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@Rule
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publicTimeoutglobalTimeout =newTimeout(200);
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@Before
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publicvoidsetUp()throwsException {
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reader =newSolution();
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}
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@After
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publicvoidtearDown()throwsException {
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reader =null;
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}
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@Test
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publicvoidTest1() {
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char[]contents = {'a' };
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reader.setContents(contents);
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intn =1;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =1;
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assertEquals(expected,actual);
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char[]exps = {'a' };
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assertArrayEquals(exps,buf);
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}
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@Test
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publicvoidTest2() {
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char[]contents = {'a' ,'d','c','b' };
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reader.setContents(contents);
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intn =2;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =2;
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assertEquals(expected,actual);
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char[]exps = {'a','d' };
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assertArrayEquals(exps,buf);
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}
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@Test
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publicvoidTest3() {
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char[]contents = {'x' ,'y' };
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reader.setContents(contents);
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intn =5;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =2;
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assertEquals(expected,actual);
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char[]exps =newchar[n];
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exps[0] ='x';
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exps[1] ='y';
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assertArrayEquals(exps,buf);
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}
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@Test
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publicvoidTest4() {
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char[]contents = {'a','b','c','d','e'};
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reader.setContents(contents);
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intn =7;
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char[]buf =newchar[n];
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intactual =reader.read(buf,n);
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intexpected =5;
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assertEquals(expected,actual);
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char[]exps =newchar[n];
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exps[0] ='a';
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exps[1] ='b';
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exps[2] ='c';
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exps[3] ='d';
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exps[4] ='e';
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assertArrayEquals(exps,buf);
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}
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}

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