Tadashi G. Takaoka | 6504675 | 2017-08-01 13:02:59 +0900 | [diff] [blame] | 1 | package com.android.settingslib.inputmethod; |
| 2 | |
| 3 | import static junit.framework.Assert.assertEquals; |
| 4 | import static junit.framework.Assert.assertTrue; |
| 5 | |
| 6 | import android.support.test.InstrumentationRegistry; |
| 7 | import android.support.test.filters.SmallTest; |
| 8 | import android.support.test.runner.AndroidJUnit4; |
| 9 | |
| 10 | import org.junit.Test; |
| 11 | import org.junit.runner.RunWith; |
| 12 | |
| 13 | import java.text.Collator; |
| 14 | import java.util.ArrayList; |
| 15 | import java.util.Arrays; |
| 16 | import java.util.Collection; |
| 17 | import java.util.List; |
| 18 | import java.util.Locale; |
| 19 | import java.util.function.BiConsumer; |
| 20 | import java.util.function.Function; |
| 21 | |
| 22 | @SmallTest |
| 23 | @RunWith(AndroidJUnit4.class) |
| 24 | public class InputMethodSubtypePreferenceTest { |
| 25 | |
| 26 | private static final List<InputMethodSubtypePreference> ITEMS_IN_ASCENDING = Arrays.asList( |
| 27 | // Subtypes that has the same locale of the system's. |
| 28 | createPreference("", "en_US", Locale.US), |
| 29 | createPreference("E", "en_US", Locale.US), |
| 30 | createPreference("Z", "en_US", Locale.US), |
| 31 | // Subtypes that has the same language of the system's. |
| 32 | createPreference("", "en", Locale.US), |
| 33 | createPreference("E", "en", Locale.US), |
| 34 | createPreference("Z", "en", Locale.US), |
| 35 | // Subtypes that has different language than the system's. |
| 36 | createPreference("", "ja", Locale.US), |
| 37 | createPreference("A", "hi_IN", Locale.US), |
| 38 | createPreference("B", "", Locale.US), |
| 39 | createPreference("E", "ja", Locale.US), |
| 40 | createPreference("Z", "ja", Locale.US) |
| 41 | ); |
| 42 | private static final List<InputMethodSubtypePreference> SAME_ITEMS = Arrays.asList( |
| 43 | // Subtypes that has different language than the system's. |
| 44 | createPreference("A", "ja_JP", Locale.US), |
| 45 | createPreference("A", "hi_IN", Locale.US), |
| 46 | // Subtypes that has an empty subtype locale string. |
| 47 | createPreference("A", "", Locale.US) |
| 48 | ); |
| 49 | private static final Collator COLLATOR = Collator.getInstance(Locale.US); |
| 50 | |
| 51 | @Test |
| 52 | public void testComparableOrdering() throws Exception { |
| 53 | onAllAdjacentItems(ITEMS_IN_ASCENDING, |
| 54 | (x, y) -> assertTrue( |
| 55 | x.getKey() + " is less than " + y.getKey(), |
| 56 | x.compareTo(y, COLLATOR) < 0) |
| 57 | ); |
| 58 | } |
| 59 | |
| 60 | @Test |
| 61 | public void testComparableEquality() { |
| 62 | onAllAdjacentItems(SAME_ITEMS, |
| 63 | (x, y) -> assertTrue( |
| 64 | x.getKey() + " is equal to " + y.getKey(), |
| 65 | x.compareTo(y, COLLATOR) == 0) |
| 66 | ); |
| 67 | } |
| 68 | |
| 69 | @Test |
| 70 | public void testComparableContracts() { |
| 71 | final Collection<InputMethodSubtypePreference> items = new ArrayList<>(); |
| 72 | items.addAll(ITEMS_IN_ASCENDING); |
| 73 | items.addAll(SAME_ITEMS); |
| 74 | items.add(createPreference("", "", Locale.US)); |
| 75 | items.add(createPreference("A", "en", Locale.US)); |
| 76 | items.add(createPreference("A", "en_US", Locale.US)); |
| 77 | items.add(createPreference("E", "hi_IN", Locale.US)); |
| 78 | items.add(createPreference("E", "en", Locale.US)); |
| 79 | items.add(createPreference("Z", "en_US", Locale.US)); |
| 80 | |
| 81 | assertComparableContracts( |
| 82 | items, |
| 83 | (x, y) -> x.compareTo(y, COLLATOR), |
| 84 | InputMethodSubtypePreference::getKey); |
| 85 | } |
| 86 | |
| 87 | private static InputMethodSubtypePreference createPreference( |
| 88 | final String subtypeName, |
| 89 | final String subtypeLocaleString, |
| 90 | final Locale systemLocale) { |
| 91 | return new InputMethodSubtypePreference( |
| 92 | InstrumentationRegistry.getTargetContext(), |
| 93 | subtypeName + "-" + subtypeLocaleString + "-" + systemLocale, |
| 94 | subtypeName, |
| 95 | subtypeLocaleString, |
| 96 | systemLocale); |
| 97 | } |
| 98 | |
| 99 | private static <T> void onAllAdjacentItems(final List<T> items, final BiConsumer<T, T> check) { |
| 100 | for (int i = 0; i < items.size() - 1; i++) { |
| 101 | check.accept(items.get(i), items.get(i + 1)); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | @FunctionalInterface |
| 106 | interface CompareTo<T> { |
| 107 | int apply(T t, T u); |
| 108 | } |
| 109 | |
| 110 | private static <T> void assertComparableContracts(final Collection<T> items, |
| 111 | final CompareTo<T> compareTo, final Function<T, String> name) { |
| 112 | for (final T x : items) { |
| 113 | final String nameX = name.apply(x); |
| 114 | assertTrue("Reflective: " + nameX + " is equal to itself", |
| 115 | compareTo.apply(x, x) == 0); |
| 116 | for (final T y : items) { |
| 117 | final String nameY = name.apply(y); |
| 118 | assertEquals("Asymmetric: " + nameX + " and " + nameY, |
| 119 | Integer.signum(compareTo.apply(x, y)), |
| 120 | -Integer.signum(compareTo.apply(y, x))); |
| 121 | for (final T z : items) { |
| 122 | final String nameZ = name.apply(z); |
| 123 | if (compareTo.apply(x, y) > 0 && compareTo.apply(y, z) > 0) { |
| 124 | assertTrue("Transitive: " + nameX + " is greater than " + nameY |
| 125 | + " and " + nameY + " is greater than " + nameZ |
| 126 | + " then " + nameX + " is greater than " + nameZ, |
| 127 | compareTo.apply(x, z) > 0); |
| 128 | } |
| 129 | if (compareTo.apply(x, y) == 0) { |
| 130 | assertEquals("Transitive: " + nameX + " and " + nameY + " is same " |
| 131 | + " then both return the same result for " + nameZ, |
| 132 | Integer.signum(compareTo.apply(x, z)), |
| 133 | Integer.signum(compareTo.apply(y, z))); |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | } |