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StreamToLoop tests grouped

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This commit is contained in:
Tagir Valeev
2017-01-27 17:38:37 +07:00
parent babce0b78c
commit fb6ba726e5
307 changed files with 2749 additions and 4686 deletions
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70
java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeGroupingBy.java
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@@ -1,15 +1,75 @@
// "Replace Stream API chain with loop" "true"
// "Fix all 'Stream API call chain can be replaced with loop' problems in file" "true"
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;
public class Main {
public static Map<Integer, List<String>> test(List<String> strings) {
return strings.stream().col<caret>lect(Collectors.groupingBy(str -> str.length()));
public static Map<Integer, List<String>> testSimple(List<String> strings) {
return strings.stream().co<caret>llect(Collectors.groupingBy(str -> str.length()));
}
public static Map<Integer, List<String>> testVarConflict(List<String> strings, int k) {
return strings.stream().collect(Collectors.groupingBy(String::length));
}
static void testCounting(List<String> list) {
Map<Integer, Long> map = list.stream().collect(Collectors.groupingBy(String::length, Collectors.counting()));
System.out.println(map);
}
private static TreeMap<Integer, LinkedHashSet<String>> testCustomMap(List<String> strings) {
return strings.stream().collect(
Collectors.groupingBy(String::length, () -> new TreeMap<>(Comparator.reverseOrder()), Collectors.toCollection(LinkedHashSet::new)));
}
static void testSummingDouble(List<String> list) {
Map<Integer, Double> map4 = list.stream().collect(Collectors.groupingBy(String::length, Collectors.summingDouble(String::length)));
System.out.println(map4);
}
static void testMappingSummingInt(List<String> list) {
Map<Integer, Integer> map3 = list.stream().collect(Collectors.groupingBy(String::length, Collectors.mapping(String::trim, Collectors.summingInt(String::length))));
System.out.println(map3);
}
public static void testGroupingGroupingToSet(List<String> strings) {
System.out.println(strings.stream().collect(Collectors.groupingBy(String::length, Collectors.groupingBy(s -> s.charAt(0), Collectors.toSet()))));
}
private static TreeMap<Integer, List<Integer>> testMappingToList(List<String> strings) {
return strings.stream().collect(
Collectors.groupingBy(String::length, () -> new TreeMap<>(Comparator.reverseOrder()),
Collectors.mapping(String::length, Collectors.mapping(len -> len*2, Collectors.toList()))));
}
public static void testSummarizingDouble(List<String> strings) {
System.out.println(strings.stream()
.filter(Objects::nonNull)
.collect(Collectors.groupingBy(String::length, Collectors.summarizingDouble(String::length))));
}
public static void testToMap(List<String> strings) {
System.out.println(strings.stream().collect(Collectors.groupingBy(String::length, Collectors.toMap(s -> s.charAt(0), Function.identity()))));
}
public static void testToSet(List<String> strings) {
System.out.println(strings.stream().filter(Objects::nonNull).collect(Collectors.groupingBy(String::length, Collectors.toSet())));
}
public static void main(String[] args) {
System.out.println(test(Arrays.asList()));
System.out.println(test(Arrays.asList("a", "bbb", "cc", "d", "eee")));
System.out.println(testSimple(Arrays.asList()));
System.out.println(testSimple(Arrays.asList("a", "bbb", "cc", "d", "eee")));
System.out.println(testVarConflict(Arrays.asList(), 1));
System.out.println(testVarConflict(Arrays.asList("a", "bbb", "cc", "d", "eee"), 2));
testCounting(Arrays.asList("a", "bbb", "cc", "d", "eee"));
System.out.println(testCustomMap(Arrays.asList("a", "bbb", "cccc", "dddd", "ee", "e")));
testGroupingGroupingToSet(Arrays.asList("a", "bbb", "cccc", "dddd"));
System.out.println(testMappingToList(Arrays.asList("a", "bbb", "cccc", "dddd", "ee", "e")));
testSummingDouble(Arrays.asList("a", "bbb", "cccc", "dddd"));
testMappingSummingInt(Arrays.asList("a", "bbb", "cccc", "dddd"));
testSummarizingDouble(Arrays.asList("a", "bbb", "cccc", "dddd"));
testToMap(Arrays.asList("a", "bbb", "cccc", "dddd"));
testToSet(Arrays.asList("a", "bbb", "cccc", "dddd"));
}
}